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phpmyadmin/CVE-2016-5734/README.zh-cn.md
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phpmyadmin/CVE-2016-5734/README.zh-cn.md
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# phpMyAdmin 4.0.x—4.6.2 远程代码执行漏洞(CVE-2016-5734)
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phpMyAdmin是一套开源的、基于Web的MySQL数据库管理工具。在其查找并替换字符串功能中,将用户输入的信息拼接进`preg_replace`函数第一个参数中。
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在PHP5.4.7以前,`preg_replace`的第一个参数可以利用\0进行截断,并将正则模式修改为e。众所周知,e模式的正则支持执行代码,此时将可构造一个任意代码执行漏洞。
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以下版本受到影响:
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- 4.0.10.16之前4.0.x版本
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- 4.4.15.7之前4.4.x版本
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- 4.6.3之前4.6.x版本(实际上由于该版本要求PHP5.5+,所以无法复现本漏洞)
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## 环境搭建
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运行如下命令启动PHP 5.3 + Apache + phpMyAdmin 4.4.15.6:
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```
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docker compose up -d
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```
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启动后,访问`http://your-ip:8080`,即可看到phpMyAdmin的登录页面。使用`root`:`root`登录。
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## 漏洞复现
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这个功能需要登录,且能够写入数据。
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因为目标环境使用root,所以我们可以创建一个临时数据库和数据表,进行漏洞利用。这里,我们使用POC https://www.exploit-db.com/exploits/40185/ 来复现漏洞。
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```
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./cve-2016-5734.py -c 'system(id);' -u root -p root -d test http://your-ip:8080/
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```
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-d是已经可以写的数据库,-c是待执行的PHP语句,如果没有指定表名,这个POC会创建一个名为`prgpwn`的表。
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