CVE-2022-0847 PoC — Linux kernel 安全漏洞

Source

https://github.com/mutur4/CVE-2022-0847

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

This is a repo to showcase the dirty pipe Linux Kernel Vulnerability.

Readme

## DIRTY PIPE `CVE-2022-0847`

This is a kernel vulnerability that allows overwriting of data in
arbitrary read-only files, which can therefore lead to privilege escalation since an unprivileged 
process can write into a privileged process. All credits go to 🥇[Max Kellermann](https://dirtypipe.cm4all.com/) for finding the vulnerability and his good explanation/description of the vulnerability.

![profile](dirty_pipe.png)


#### 👻 IMPORTANT NOTICE

This proof of concept code is based on `Max Kellermann's` poc, that has been modified to explore some different 
ways on how this vulnerability can be used to gain higher privileges. The exploit code includes a check  to check if the kernel version is vulnerable and using the vulnerability to overwrite `/etc/passwd` file to gain root privileges. [exploit.c](dpipe.c)

### Usage

> You can download the already compiled binary or using `make` compile the binary locally and run it to gain `root`.

File Snapshot


 [4.0K]  /data/pocs/4854ed6d15b1c001b41e549a543fd67234dbb036
├── [301K]  dirty_pipe.png
├── [ 18K]  dpipe
├── [3.9K]  dpipe.c
├── [ 137]  Makefile
└── [ 956]  README.md

0 directories, 5 files

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