UUCTF

• websign
• ez_rce -- 闭合
• ezsql -- 输入反向
• ezrce -- 6字符RCE
• • 方法一
  • 方法二
• ez_unser -- 引用绕过wakeup
• ez_upload--apache解析漏洞
• phonecode--mt_rand函数
• uploadandinject--LD_PRELOAD劫持
• ezpop -- 字符串逃逸
• funmd5--对代码的理解
• backdoor--tonyenc加密

websign

无法右键 禁用js后 看源码

ez_rce – 闭合

源码，禁用的东西挺多的 仔细发现 ? <> `没有禁用，闭合标签反引号执行命令

https://blog.csdn.net/bossDDYY/article/details/## 放弃把，小伙子，你真的不会RCE,何必在此纠结呢？？？？？？？？？？？？https://blog.csdn.net/bossDDYY/article/details/ifhttps://blog.csdn.net/bossDDYY/article/details/(https://blog.csdn.net/bossDDYY/article/details/issethttps://blog.csdn.net/bossDDYY/article/details/(https://blog.csdn.net/bossDDYY/article/details/$_GEThttps://blog.csdn.net/bossDDYY/article/details/[https://blog.csdn.net/bossDDYY/article/details/'code'https://blog.csdn.net/bossDDYY/article/details/]https://blog.csdn.net/bossDDYY/article/details/)https://blog.csdn.net/bossDDYY/article/details/)https://blog.csdn.net/bossDDYY/article/details/{    https://blog.csdn.net/bossDDYY/article/details/$codehttps://blog.csdn.net/bossDDYY/article/details/=https://blog.csdn.net/bossDDYY/article/details/$_GEThttps://blog.csdn.net/bossDDYY/article/details/[https://blog.csdn.net/bossDDYY/article/details/'code'https://blog.csdn.net/bossDDYY/article/details/]https://blog.csdn.net/bossDDYY/article/details/;    https://blog.csdn.net/bossDDYY/article/details/if https://blog.csdn.net/bossDDYY/article/details/(https://blog.csdn.net/bossDDYY/article/details/!https://blog.csdn.net/bossDDYY/article/details/preg_matchhttps://blog.csdn.net/bossDDYY/article/details/(https://blog.csdn.net/bossDDYY/article/details/'/sys|pas|read|file|ls|cat|tac|head|tail|more|less|php|base|echo|cp|\$|\*|\+|\^|scan|\.|local|current|chr|crypt|show_source|high|readgzfile|dirname|time|next|all|hex2bin|im|shell/i'https://blog.csdn.net/bossDDYY/article/details/,https://blog.csdn.net/bossDDYY/article/details/$codehttps://blog.csdn.net/bossDDYY/article/details/)https://blog.csdn.net/bossDDYY/article/details/)https://blog.csdn.net/bossDDYY/article/details/{        https://blog.csdn.net/bossDDYY/article/details/echo https://blog.csdn.net/bossDDYY/article/details/'看看你输入的参数！！！不叫样子！！'https://blog.csdn.net/bossDDYY/article/details/;https://blog.csdn.net/bossDDYY/article/details/echo https://blog.csdn.net/bossDDYY/article/details/'
'https://blog.csdn.net/bossDDYY/article/details/;        https://blog.csdn.net/bossDDYY/article/details/evalhttps://blog.csdn.net/bossDDYY/article/details/(https://blog.csdn.net/bossDDYY/article/details/$codehttps://blog.csdn.net/bossDDYY/article/details/)https://blog.csdn.net/bossDDYY/article/details/;    https://blog.csdn.net/bossDDYY/article/details/}    https://blog.csdn.net/bossDDYY/article/details/elsehttps://blog.csdn.net/bossDDYY/article/details/{        https://blog.csdn.net/bossDDYY/article/details/diehttps://blog.csdn.net/bossDDYY/article/details/(https://blog.csdn.net/bossDDYY/article/details/"你想干什么？？？？？？？？？"https://blog.csdn.net/bossDDYY/article/details/)https://blog.csdn.net/bossDDYY/article/details/;    https://blog.csdn.net/bossDDYY/article/details/}https://blog.csdn.net/bossDDYY/article/details/}https://blog.csdn.net/bossDDYY/article/details/elsehttps://blog.csdn.net/bossDDYY/article/details/{    https://blog.csdn.net/bossDDYY/article/details/echo https://blog.csdn.net/bossDDYY/article/details/"居然都不输入参数，可恶!!!!!!!!!"https://blog.csdn.net/bossDDYY/article/details/;    https://blog.csdn.net/bossDDYY/article/details/show_sourcehttps://blog.csdn.net/bossDDYY/article/details/(https://blog.csdn.net/bossDDYY/article/details/__FILE__https://blog.csdn.net/bossDDYY/article/details/)https://blog.csdn.net/bossDDYY/article/details/;https://blog.csdn.net/bossDDYY/article/details/}

[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-wkx4nqjg-1667461598333)(F:/%E7%AC%94%E8%AE%B0%E5%9B%BE%E7%89%87/image-20221102084645846.png)]

[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-L8KGVTDW-1667461598333)(F:/%E7%AC%94%E8%AE%B0%E5%9B%BE%E7%89%87/image-20221102084658608.png)]

nl输出

ezsql – 输入反向

直接给出了查询语句

发现输入 11’)–+ 显示的是 ±-)'11 完全反过来了

首先使用万能密码试试

发现即使输入时正确的账号密码也不会回显flag

找列数 2列

这里过滤了or 双写绕过，查找表名和数据库名

查列名UUCTF

查内容

ezrce – 6字符RCE

hint：这是一个命令执行接口

我知道咯这是六字符 起初我输入>nl 回显命令执行失败 我以为没有运行 所以没写

所以说不可以完全信回显

我们要先找到写文件写的目录 echo 一下，文件写在./tmp/

方法一

>nl* const u_char tonyenc_header[] = {        0x66, 0x88, 0xff, 0x4f,        0x68, 0x86, 0x00, 0x56,        0x11, 0x16, 0x16, 0x18,};const u_char tonyenc_key[] = {        0x9f, 0x49, 0x52, 0x00,        0x58, 0x9f, 0xff, 0x21,        0x3e, 0xfe, 0xea, 0xfa,        0xa6, 0x33, 0xf3, 0xc6,};

在IDA中找到对应的加密头和key

根据github源码写解密py脚本

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解密得到backdoor.php文件内容为

[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-gEwEUhZ0-1667461598351)(F:/%E7%AC%94%E8%AE%B0%E5%9B%BE%E7%89%87/image-20221103154452619.png)]

来源地址：https://blog.csdn.net/bossDDYY/article/details/127671924