CVE-2021-4034 PoC — polkit 缓冲区错误漏洞

Source

https://github.com/codiobert/pwnkit-scanner

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

Check CVE-2021-4034 vulnerability

Readme

# PwnKit Scanner

Check CVE-2021-4034 vulnerability

This test is not 100% reliable, but it helps with a quick scan.

## How to use (Linux Debian based systems):

	wget https://raw.githubusercontent.com/codiobert/pwnkit-scanner/main/pwnkit-scanner-debian.sh -q -O - |bash

## How to use (Linux Red Hat based systems):

	wget https://raw.githubusercontent.com/codiobert/pwnkit-scanner/main/pwnkit-scanner-redhat.sh -q -O - |bash


## Linux Distributions Affected
### Linux Distributions Affected By The Polkit Privilege Escalation Vulnerability (CVE-2021-4034)
The flaw is successfully tested on Ubuntu, Debian, Fedora, and CentOS with default configuration. Since Polkit is part of the default installation package in most of the Linux distributions and all Polkit versions from 2009 onwards are vulnerable., the whole Linux platform is considered vulnerable to the Polkit privilege escalation vulnerability.

## Patch vulnerability
If your operating system is vulnerable you should obtain and apply a patch as quickly as possible from your Linux distributor.
If no patches are available for your operating system, you can remove the SUID-bit from pkexec as a temporary mitigation:

	# chmod 0755 /usr/bin/pkexec

File Snapshot


 [4.0K]  /data/pocs/718fc971296070efd27b9ec8b5e7347b6964eb9c
├── [1.2K]  LICENSE
├── [1.1K]  pwnkit-scanner-debian.sh
├── [7.4K]  pwnkit-scanner-redhat.sh
└── [1.2K]  README.md

0 directories, 4 files

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