CVE-2014-6271 PoC — GNU Bash 远程代码执行漏洞

Source

https://github.com/cyberharsh/Shellbash-CVE-2014-6271

Associated Vulnerability

Title:GNU Bash 远程代码执行漏洞 (CVE-2014-6271)
Description:GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution, aka "ShellShock." NOTE: the original fix for this issue was incorrect; CVE-2014-7169 has been assigned to cover the vulnerability that is still present after the incorrect fix.

Readme

# Shellshock Remote Command Injection (CVE-2014-6271)

[中文版本(Chinese version)](README.zh-cn.md)

Build and run the vulnerable environment：

```
docker-compose build
docker-compose up -d
```

When you visit `http://your-ip/` you should see two files:

 - safe.cgi
 - victim.cgi

safe.cgi generated by the latest version of bash, and victim.cgi is the page generated by bash4.3 which is vulnerable to shellshock.

We can send include our payload in the user-agent string when visiting victim.cgi and the command is executed successfully:

![](1.png)

The same request sent to safe.cgi is unaffected:

![](2.png)

File Snapshot


 [4.0K]  /data/pocs/b3d15ea52dff037807d9254f645889e5ed22262b
├── [ 22K]  1.png
├── [ 33K]  2.png
├── [ 215]  docker-compose.yml
├── [ 194]  Dockerfile
├── [  13]  flagA
├── [ 620]  README.md
├── [ 515]  README.zh-cn.md
├── [ 299]  safe.cgi
└── [ 320]  victim.cgi

0 directories, 9 files

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