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。
介绍
# CVE-2021-4034
This is an exploit created for CVE-2021-4034 meant as a POC. It is based off the info at [https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt](https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt).
### How to use it:
- Download the exploit folder. Compile prog.c with `gcc prog.c`
- Go to the GCONV_PATH=. folder and ensure that the "code" file is executable (chmod +x code).
- Go to the "code" folder and compile payload.c with `gcc payload.c -o payload.so -shared -fPIC`
- Note: You'll probably want to change "YOUR_USERNAME" in payload.c if you actually want to see if it works.
- After all of this is set, go back to the main folder, and run the program with `./a.out`.
Note: You can rename this file, a.out is simply the default name from GCC.
文件快照
[4.0K] /data/pocs/303a32cbbe8b9271427066491531a9c83675cd5c
├── [4.0K] exploit
│ ├── [4.0K] code
│ │ ├── [ 68] gconv-modules
│ │ └── [ 166] payload.c
│ ├── [4.0K] GCONV_PATH=.
│ │ └── [ 104] code
│ └── [ 233] prog.c
└── [ 781] README.md
3 directories, 5 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。