CVE-2019-18634 PoC — Sudo 缓冲区错误漏洞

Source

https://github.com/Plazmaz/CVE-2019-18634

Associated Vulnerability

Title:Sudo 缓冲区错误漏洞 (CVE-2019-18634)
Description:In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.

Description

A functional exploit for CVE-2019-18634, a BSS overflow in sudo's pwfeedback feature that allows for for privesc

Readme

# CVE-2019-18634

**:warning: This code has only been tested on sudo 1.8.25. The bug impacts <1.8.30, but there are differences in character handling that prevent this PoC from executing (this does not mitigate the exploitability of the bug). See [#1](https://github.com/Plazmaz/CVE-2019-18634/issues/1) :warning:**  
  
Functional exploit for CVE-2019-18634, a heap buffer overflow that leads to privilege escalation on sudo <=1.8.30 if pwfeedback is enabled.  
[https://dylankatz.com/Analysis-of-CVE-2019-18634/](https://dylankatz.com/Analysis-of-CVE-2019-18634/)  
This repo contains both a single-file script (`self-contained.sh`), and the scripts used to generate it (under `src`)  
Thanks to yuu and Anonymous_ for help in developing this exploit and these scripts.  
Credit to Joe Vennix and William Bowling for the original discovery of the bug and the information on exploiting through 1.8.30.

File Snapshot


 [4.0K]  /data/pocs/1dca040d9f0fa9c4039abb41df6b44f7a4336031
├── [ 905]  README.md
├── [1.3K]  self-contained.sh
└── [4.0K]  src
    ├── [ 554]  exec.c
    ├── [ 346]  run.sh
    └── [ 440]  xpl.pl

1 directory, 5 files

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