CVE-2023-4911 PoC — glibc 缓冲区错误漏洞

Source

https://github.com/guffre/CVE-2023-4911

Associated Vulnerability

Title:glibc 缓冲区错误漏洞 (CVE-2023-4911)
Description:glibc（GNU C Library）是GNU计划所实现的C标准库。 glibc存在缓冲区错误漏洞，该漏洞源于动态加载程序ld.so存在缓冲区溢出漏洞。

Description

PoC for CVE-2023-4911 LooneyTuneables

Readme

# CVE-2023-4911
This is a PoC for CVE-2023-4911 ("Looney Tunables") that exploits a bug in the glibc dynamic loader's GLIBC_TUNABLES environment variable parsing function parse_tunables().

This is a rewrite of the C PoC's into a pure python approach. I did this to make it easier to customize the exploit for other platforms.
The only requirement is pwntools, which can be installed as follows:

    python3 -m pip install --upgrade pwntools

I got the original C PoC from: https://github.com/leesh3288/CVE-2023-4911

This code was tested on Ubuntu 22.04.3 with glibc version 2.35-0ubuntu3.1

# su offsets

This image shows the Ubuntu `su` executable. This is why `"` is chosen as the directory symbol, and the offset of -20 bytes points to that symbol:

![image](https://github.com/guffre/CVE-2023-4911/assets/21281361/aab8e766-344f-44ea-a2e6-2b5a5cca1730)

You should check the `su` binary on the machine you are targeting to make sure the offset and symbol are correct.

File Snapshot


 [4.0K]  /data/pocs/946909c5741324384f635fe0faea831c3d4c8386
├── [2.8K]  poc.py
└── [ 974]  README.md

0 directories, 2 files

Shenlong Bot has cached this for you

Remarks

1. It is advised to access via the original source first.

2. If the original source is unavailable, please email f.jinxu#gmail.com for a local snapshot (replace # with @).

3. Shenlong has snapshotted the POC code for you. To support long-term maintenance, please consider donating. Thank you for your support.

Goal Reached Thanks to every supporter — we hit 100%!