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CVE-2022-0847 PoC — Linux kernel 安全漏洞

Source
Associated Vulnerability
Title:Linux kernel 安全漏洞 (CVE-2022-0847)
Description: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。
Readme
# CVE-2022-0847 POC

> 来源:https://www.exploit-db.com/exploits/50808

1. 编译

   在linux中 `gcc -o dirty dirty.c`编译POC程序

2. 使用

   `./dirty SUID`执行程序。其中,SUID是指具有SUID的程序的路径

   一般可以用 `/usr/bin/passwd`,也就是执行`./dirty /usr/bin/passwd`

   ![image-20220315163100154](README.assets/image-20220315163100154.png)

   可以获取root的shell
   
3. 可以使用`find / -perm /4000`查询具有SUID的程序。

   ![image-20220315164326855](README.assets/image-20220315164326855.png)

   ![image-20220315164346358](README.assets/image-20220315164346358.png)

4. 别忘了删除 `/tmp/sh`

   ![image-20220315165450528](README.assets/image-20220315165450528.png)



File Snapshot

[4.0K] /data/pocs/0bd2cc47e5d12aaee27e31083bb7d2dd30301293 ├── [7.1K] dirty.c ├── [4.0K] README.assets │   ├── [ 25K] image-20220315163100154.png │   ├── [ 19K] image-20220315164326855.png │   ├── [ 12K] image-20220315164346358.png │   └── [9.3K] image-20220315165450528.png └── [ 738] README.md 1 directory, 6 files
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