关联漏洞
标题：
Linux kernel 安全漏洞
(CVE-2022-0847)
描述：Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于新管道缓冲区结构的“flag”变量在 Linux 内核中的 copy_page_to_iter_pipe 和 push_pipe 函数中缺乏正确初始化。非特权本地用户利用该漏洞可以提升权限至root。以下产品和版本受到影响：Linux Kernel 5.8-5.16.11、5.8-5.15.25、5.8-5.10.102。
描述
A “Dirty Pipe” vulnerability with CVE-2022-0847 and a CVSS score of 7.8 has been identified, affecting Linux Kernel 5.8 and higher. The vulnerability allows attackers to overwrite data in read-only files. Threat actors can exploit this vulnerability to privilege themselves with code injection.
介绍
# What is this
This is Max Kellermann's proof of concept for Dirty Pipe, but modified to overwrite root's password field in /etc/passwd and restore after popping a root shell.
**Side Note:** I do not claim any credit for finding this vulnerability or writing the proof of concept. This exploit is merely a small modification of Kellermann's proof of concept to enable quick/easy exploitation. Please read the original article on this extremely interesting vulnerability @ https://dirtypipe.cm4all.com/ when you get the opportunity. It really does deserve your time to understand it.
# How to use this
1. Compile with `./compile.sh` (assumes `gcc` is installed)
2. Run `./exploit` and it'll pop a root shell
# su: must be run from a terminal
If you get this error message:
1. Login as `root` with the password `aaron`.
2. Then, restore `/etc/passwd` by running `mv /tmp/passwd.bak /etc/passwd`
(oops sorry my laptop battery is dying and my charger broke so I don't have time to fix this the right now, sorry)
文件快照
[4.0K] /data/pocs/4f61e0beffc4b53c081b422aced3e76398c0d27d
├── [ 37] compile.sh
├── [5.2K] exploit.c
├── [ 16K] LICENSE.txt
└── [1016] 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 @）。
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