{"id":1130,"date":"2022-06-03T10:54:00","date_gmt":"2022-06-03T02:54:00","guid":{"rendered":"https:\/\/www.zhiwanyuzhou.com\/?p=1130"},"modified":"2022-06-03T12:50:42","modified_gmt":"2022-06-03T04:50:42","slug":"mrctf2022-iot%e9%a2%98%e7%9b%ae%e4%b9%8bnand%e6%9c%89%e6%95%88%e6%95%b0%e6%8d%ae%e5%88%86%e6%9e%90%ef%bc%881%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.zhiwanyuzhou.com\/index.php\/2022\/06\/03\/mrctf2022-iot%e9%a2%98%e7%9b%ae%e4%b9%8bnand%e6%9c%89%e6%95%88%e6%95%b0%e6%8d%ae%e5%88%86%e6%9e%90%ef%bc%881%ef%bc%89\/","title":{"rendered":"MRCTF2022 IoT\u9898\u76ee\u4e4bNand\u6709\u6548\u6570\u636e\u5206\u6790\uff081\uff09"},"content":{"rendered":"\n

IoT\u9898\u76ee\uff0c\u539f\u9898\u63cf\u8ff0\uff1a<\/p>\n\n\n\n

\u56fa\u4ef6\u7adf\u7136\u52a0\u5bc6\u4e86\uff1f\uff01
\u7f16\u7a0b\u5668\u63d0\u53d6\u51fa\u56fa\u4ef6S34ML02G200BHI00@BGA63_948.BIN\u3002
\u4f60\u80fd\u4ece\u4e2d\u53d1\u73b0\u89e3\u5bc6\u903b\u8f91\u5417\uff1f<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u770b\u5230\u6587\u4ef6\u540d\uff1aS34ML02G200BHI00@BGA63_948.BIN\uff0c\u901a\u8fc7\u7ecf\u9a8c\u53ef\u77e5\u662fRT809\u7cfb\u5217\u7684\u7f16\u7a0b\u5668\u8bfb\u53d6\u7684\u6587\u4ef6\u5f62\u5f0f\uff0c\u8fd9\u91cc\u6709\u610f\u601d\u7684\u5730\u65b9\u5e76\u4e0d\u662f\u62ff\u5230flag\uff0c\u800c\u662f\u5206\u6790\u7f16\u7a0b\u5668\u8bfb\u53d6\u7684\u6570\u636e\uff0c\u90a3\u4e48\u4e0b\u9762\u6211\u4eec\u4e3b\u8981\u8bb2\u89e3\u4e00\u4e0b\u5982\u4f55\u5206\u6790Nand\u7684\u6709\u6548\u6570\u636e\u3002<\/p>\n\n\n\n

\u9996\u5148\uff0c\u6839\u636e\u7b2c\u4e00\u4e2a\u6587\u4ef6\u540d\u53ef\u77e5Flash\u82af\u7247\u7684\u578b\u53f7\u4e3aS34ML02G200BHI00<\/a>\uff0c\u901a\u8fc7\u67e5\u770b\u82af\u7247\u7684datasheet\u6587\u4ef6\uff0c\u53ef\u4ee5\u77e5\u6653\u82af\u7247\u662f2Gbit=256MB\u5927\u5c0f\uff0c\u5b9e\u9645\u7f16\u7a0b\u5668\u63d0\u53d6\u7684\u5927\u5c0f\u4e3a272MB\uff0c\u5176\u4e2d\u6709272MB-256MB=16MB\u7684\u5927\u5c0f\u4e3aspare area\uff0c\u4e5f\u5c31\u662fOOB\u533a\uff0c\u901a\u5e38\u5728OOB\u533a\u5b58\u653e\u574f\u5757\u6807\u8bb0\u3001ECC\u8f83\u9a8c\u7801\u3001\u6587\u4ef6\u7cfb\u7edf\u4fe1\u606f(yaffs)\u7b49<\/em><\/strong>\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u6839\u636eIO\u603b\u7ebf\u7684\u4f4d\u5bbd\u4e0d\u540c\uff0c\u82af\u7247\u7684\u9875\u5927\u5c0f\u3001\u5757\u5927\u5c0f\u3001\u677f\u5757\u5927\u5c0f\u6709\u7740\u4e0d\u4e00\u6837\u7684\u5206\u5e03\uff0c\u4e0b\u9762\u662f256MB\u5b58\u50a8\u60c5\u51b5\u4e0b\uff0cIO\u603b\u7ebf\u4f4d\u5bbd\u4e3a8bits\u7684\u65f6\u5019\u7684\u4fe1\u606f\uff1a<\/p>\n\n\n\n

\u5206\u7c7b<\/td>\u5355\u4e2a\u5206\u7c7b\u5927\u5c0f (bytes)<\/td>\u6709\u6548\u6570\u636e\u5927\u5c0f (bytes)<\/td>OOB\u5927\u5c0f (bytes)<\/td>\u5907\u6ce8<\/td><\/tr>
\u9875<\/td>2048+64<\/td>2048<\/td>128<\/td>\u6700\u5c0f\u5b58\u50a8\u5f62\u5f0f<\/td><\/tr>
\u5757<\/td>128*1024 + 8*1024<\/td>128*1024<\/td>8*1024<\/td>1\u5757=64\u9875<\/td><\/tr>
\u677f\u5757<\/td>128*1024*1024 + 8*1024*1024<\/td>128*1024*1024<\/td>8*1024*1024<\/td>1\u677f\u5757=1024\u5757<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u5bf9\u4e8eS34ML02G200BHI00\u8fd9\u6b3e\u82af\u7247\u7684\u82af\u7247\u7ed3\u6784\u56fe\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

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\"\"<\/figure>\n\n\n\n

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\u6211\u4eec\u4f7f\u752816\u8fdb\u5236\u5de5\u5177\u67e5\u770b\uff0c\u53d1\u73b00x210\u5f00\u59cb\u7684\u6570\u636e\u5757\u7684\u4e0a\u65b9\u4e0e\u4e0b\u65b9\u8fd8\u662f\u6709\u592a\u5927\u7684\u533a\u522b\u7684\uff0c\u6bd4\u5982\u6700\u660e\u663e\u7684\u53f3\u8fb9\u7684OD\u4e0a\u9762\u662fFD\uff0c\u4e0b\u9762\u4e5f\u662fFD\uff0c\u662f\u4e0d\u662f\u6709\u4e9b\u4e0d\u5bf9\u5e94\u7684\u611f\u89c9\uff08\u8fd9\u91cc\u53ea\u662f\u731c\u6d4b\uff09\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u540c\u6837\uff0c\u57280x410\u5f00\u59cb\u7684\u6570\u636e\u5757\u7684\u4e0a\u65b9\u4e0e\u4e0b\u4e5f\u662f\u6709\u592a\u5927\u7684\u533a\u522b\u7684\uff08\u8fd9\u91cc\u53ea\u662f\u731c\u6d4b\uff09\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u7531\u4e8eBootLoader\u7684\u6587\u4ef6\u7ed3\u6784\u6ca1\u6709\u7edf\u4e00\u7684\u683c\u5f0f\uff0c\u8fd9\u91cc\u4e5f\u65e0\u6cd5\u901a\u8fc7\u8fd9\u70b9\u4fe1\u606f\u8fdb\u884c\u5206\u6790\uff0c\u90a3\u4e48\u6211\u4eec\u518d\u5411\u6587\u4ef6\u540e\u9762\u7684\u533a\u57df\u8fdb\u884c\u5206\u6790\uff0c\u80fd\u591f\u627e\u5230\u6709\u89c4\u5f8b\u7684\u6570\u636e\u5757\u662f\u6700\u597d\u7684\uff0c\u5982\u5168\u662f00\u7684\u6570\u636e\u5757\u3001\u8fde\u7eed\u5b57\u7b26\u4e32\u7684\u6570\u636e\u5757\u3001\u7279\u6b8a\u6587\u4ef6\u7684\u6570\u636e\u5757\u7b49\u7b49\u3002<\/p>\n\n\n\n

\u8fd9\u91cc\u6211\u4eec\u627e\u5230\u4e86\u4e00\u4e2aBootLoader\u7684\u914d\u7f6e\u4fe1\u606f\uff0c\u6839\u636ebootcmd\u3001bootm\u7b49\u5b57\u7b26\u4e32\u53ef\u4ee5\u77e5\u9053\u6b64BootLoader\u4e3aU-BOOT\u7684\uff0c\u8fd9\u5757\u6570\u636e\u521a\u597d\u662fU-BOOT\u7684\u914d\u7f6e\u4fe1\u606f\uff08\u53ef\u4ee5\u53c2\u8003\u4e4b\u524d\u7684\u6587\u7ae0\u300aU-BOOT\u547d\u4ee4\u793a\u4f8b<\/a>\u300b\uff09\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u901a\u5e38U-BOOT\u7684\u914d\u7f6e\u4fe1\u606f\u662f\u5148\u6e050\u518d\u5b58\u50a8\u7684\uff0c\u4e14\u914d\u7f6e\u533a\u95f4\u7684\u5927\u5c0f\u662f\u6bd4\u8f83\u5145\u8db3\u7684\uff0c\u90a3\u4e48\u5e94\u8be5\u53ef\u4ee5\u627e\u5168\u662f00\u7684\u6570\u636e\u5757\uff0c\u518d\u8fdb\u884c\u5206\u6790OOB\u5c31\u6bd4\u8f83\u5bb9\u6613\u4e86\uff0c\u8fd9\u91cc\u6211\u4eec\u622a\u53d6\u4e860x89980-0x8A1FF\u8fd9\u4e2a\u533a\u95f4\uff080x880\u5927\u5c0f\uff09\u3002<\/p>\n\n\n\n

\u7531\u4e8e\u8fd9\u4e2a\u533a\u95f4\u6bb5\u6709\u6548\u6570\u636e\u5e94\u8be5\u5168\u662f00\uff0c\u90a3\u4e48\u4e0d\u662f00\u7684\u5c31\u662fOOB\u533a\u4e86\uff0c\u901a\u8fc7\u5199\u811a\u672c\u6216\u8089\u773c\u89c2\u5bdf\u5c31\u80fd\u7b80\u5355\u7684\u5f97\u5230\u60f3\u8981\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u901a\u8fc7\u89c2\u5bdf\u53ef\u4ee5\u6e05\u9664\u7684\u770b\u52300x89D90\u5f00\u59cb\u768414\u4e2a\u5b57\u8282\u7684\u6570\u636e\uff08\u57571\uff09\u30010x8A170\u5f00\u59cb\u76842\u5b57\u8282\u6570\u636e\uff08\u57572\uff09\u4ee5\u53ca\u4ece0x8A190\u5f00\u59cb\u7684112\u5b57\u8282\u7684\u6570\u636e\uff08\u57573\uff09\u662f\u6bd4\u8f83\u53ef\u7591\u7684\uff0c\u800c\u57573\u91cc\u9762\u5305\u542b00\u662f\u5426\u662f\u6709\u6548\u6570\u636e\u7684\u4e00\u90e8\u5206\u5462\uff1f<\/p>\n\n\n\n

\u5176\u5b9e\u57571+\u57572+\u57573\u5927\u5c0f=128\u5b57\u8282\uff0c\u662f\u6ee1\u8db3\u4e8e\u6bcf\u9875\u7684OOB\u5927\u5c0f\u4e3a128\u5b57\u8282\u7684\uff0c\u518d\u6839\u636e\u5176\u4ed6\u9875\u7684\u89c4\u5f8b\u53ef\u4ee5\u770b\u51fa\u57573\u768400\u90fd\u5b58\u5728\uff0c\u57fa\u672c\u53ef\u4ee5\u65ad\u5b9a\u6211\u4eec\u7684\u731c\u60f3\u662f\u6b63\u786e\u7684\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u77e5\u9053\u4e86OOB\u533a\u7684\u89c4\u5f8b\u4e4b\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u7f16\u5199\u811a\u672c\uff08python\u7248\uff09\uff1a<\/p>\n\n\n\n

#!\/usr\/bin\/python3\n\ndata = open(\"S34ML02G200BHI00@BGA63_948.BIN\", \"rb\").read()\n\nf = open(\"fix.bin\", \"wb\")\np = 0x880\nfor i in range(len(data)\/\/p):\n    f.write(data[i*p:i*p+0x410] + data[i*p+0x41E:i*p+0x800] + data[i*p+0x802:i*p+0x810])\nf.close()<\/code><\/pre>\n\n\n\n
\u6700\u7ec8\u7528binwalk\u5c31\u80fd\u89e3\u5f00\u4fee\u590d\u7684\u56fa\u4ef6fix.bin\uff08\u547d\u4ee4\uff1abinwalk -Me fix.bin\uff09\uff1a<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u80fd\u591f\u89e3\u5f00\u76ee\u5f55\u7684\u901a\u5e38\u90fd\u662f\u5305\u542b\u6587\u4ef6\u7cfb\u7edf\u7684\uff0c\u5176\u4e2dBFRS_HISV_rootfs.ext2\u662fext2\u683c\u5f0f\u7684\u6587\u4ef6\u7cfb\u7edf\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528mount\u6302\u8f7d\uff0c\u53c2\u8003\u4e4b\u524d\u7684\u6587\u7ae0\u300amount\u547d\u4ee4\u6280\u5de7\u4e4b\u5de7\u89e3\u6587\u4ef6\u7cfb\u7edf<\/a>\u300b\uff1a<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
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\u53c2\u8003\u94fe\u63a5\uff1a<\/strong><\/p>\n\n\n\n
https:\/\/2022.mrctf.fun<\/a><\/p>\n\n\n\n
http:\/\/www.ctfiot.com\/37681.html<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
IoT\u9898\u76ee\uff0c\u539f\u9898\u63cf\u8ff0\uff1a \u56fa\u4ef6\u7adf\u7136\u52a0\u5bc6\u4e86\uff1f\uff01\u7f16\u7a0b\u5668\u63d0\u53d6\u51fa\u56fa\u4ef6S34ML02G200BHI00@BGA63_948.BIN\u3002\u4f60\u80fd\u4ece\u4e2d\u53d1\u73b0\u89e3\u5bc6\u903b\u8f91\u5417\uff1f \u770b\u5230\u6587\u4ef6\u540d\uff1aS34ML02G200BHI00@BGA6\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\/1130"}],"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=1130"}],"version-history":[{"count":23,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/posts\/1130\/revisions"}],"predecessor-version":[{"id":1214,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/posts\/1130\/revisions\/1214"}],"wp:attachment":[{"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/media?parent=1130"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/categories?post=1130"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/tags?post=1130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}