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Linux脏牛提权漏洞复现

  • 2026-02-01 08:18:04
Linux脏牛提权漏洞复现

简述

脏牛（DirtyCow）是Linux中的一个提权漏洞。主要产生的原因是Linux系统的内核中Copy-on-Write（COW）机制产生的竞争条件问题导致，攻击者可以破坏私有只读内存映射，并提升为本地管理员权限。

前期准备

攻击机：Kali 192.168.230.128
靶机：vulnhub——Lampiao 192.168.230.217

复现过程

1、对 192.168.230.0/24 这一个网段进行扫描
nmap -sS 192.168.230.0/24
2、扫到靶机的IP为 192.168.230.217，接着对其进行深度的端口扫描
nmap -p 1-65535 -sV 192.168.230.217
3、发现三个开放端口，分别为 22、80、1898 ，访问80端口页面无反应，于是访问1898端口：http://192.168.230.217:1898
成功访问到一个登录页面
4、在该页面最下方有一行 Powered by Drupal
尝试搜索，发现Drupal是一套使用PHP语言开发的CMS
5、通过阿里云漏洞库能搜索到对应的历史漏洞
其中也存在过远程代码执行漏洞 CVE-2018-7600 ，具体内容如下所示：
6、在msf里进行搜索对应的exp
7、选择编号为1的，配置好部分参数，包括rhost，lhost，lport等等
8、输入命令run执行，成功反弹，但getuid得到的结果显示只有一个网站的权限，需要进一步提权到root
9、新建一个终端，使用python建立一个http服务器，并在对应目录下存放 linux-exploit-suggester.sh，然后在靶机这边通过wget命令下载
10、chmod +x 增加执行权限之后，执行该脚本文件
11、通过脚本测试出来的结果，发现存在脏牛提权漏洞
12、在Github上找对应的exp
13、使用同样的方式传输到靶机上面
14、解压后进入到exp对应的目录下，需要先对.cpp文件进行编译（使用make命令），之后才能执行
执行结果成功得到root用户的密码：dirtyCowFun
提权成功！目前用户为root
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  137. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-template/src/template/driver/File.php ( 2.41 KB )
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  139. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/runtime/temp/067d451b9a0c665040f3f1bdd3293d68.php ( 11.98 KB )
  140. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000927s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.002658s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.002812s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000939s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001404s ]
  6. SELECT * FROM `set` [ RunTime:0.001566s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001433s ]
  8. SELECT * FROM `article` WHERE `id` = 461300 LIMIT 1 [ RunTime:0.002694s ]
  9. UPDATE `article` SET `lasttime` = 1770615608 WHERE `id` = 461300 [ RunTime:0.006125s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.000579s ]
  11. SELECT * FROM `article` WHERE `id` < 461300 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.003558s ]
  12. SELECT * FROM `article` WHERE `id` > 461300 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001332s ]
  13. SELECT * FROM `article` WHERE `id` < 461300 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.007560s ]
  14. SELECT * FROM `article` WHERE `id` < 461300 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.006883s ]
  15. SELECT * FROM `article` WHERE `id` < 461300 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.023183s ]
0.214384s