CVE-2022-0847 PoC — Linux kernel 安全漏洞

Source

Associated Vulnerability

Title:Linux kernel 安全漏洞 (CVE-2022-0847)
Description:A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe and push_pipe functions in the Linux kernel and could thus contain stale values. An unprivileged local user could use this flaw to write to pages in the page cache backed by read only files and as such escalate their privileges on the system.

Description

exp of CVE-2022-0847

Readme

# CVE-2022-0847(Dirty Pipe) 利用

影响范围 >=5.8, <5.16.11, 5.15.25 and 5.10.102

## exp.c

利用该漏洞，覆盖只读文件

![1](p1.png)  

## exp-root-shell.c

生成执行/bin/sh的shellcode来覆盖有suid且所有者为root的程序，以`passwd`为例，再运行被覆盖的程序就可以拿到shell，实现提权。

（虽然文件的第一个字节不可修改，但只要覆盖的文件与生成的shellcode同为ELF格式，第一个字节就一定是0x7f，不必担心此问题。）

![2](p2.png)

File Snapshot


 [4.0K]  /data/pocs/a83d457bf4b841c3470b06701cb110739df5efb4
├── [3.1K]  exp.c
├── [3.3K]  exp-root-shell.c
├── [175K]  p1.png
├── [ 91K]  p2.png
└── [ 544]  README.md

0 directories, 5 files

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