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CVE-2021-3156 — CVE-2021-3156 | Kitploit

GitHub/ph4ntonn/cve-2021-3156

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ph4ntonn/cve-2021-3156

CVE-2021-3156

CVE-2021-3156

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35 years ago

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CVE-2021-3156

Overview

Heap-based buffer overflow in Sudo (CVE-2021-3156)

Heap overflow vulnerability caused by improper escaping of \ in sudo, LPE

Affected Versions

All versions from 1.8.2 to 1.8.31p2

All stable versions from 1.9.0 to 1.9.5p1

Detection Command

sudoedit -s '\' `perl -e 'print "A" x 65536'

If output similar to Segmentation fault (core dumped) appears, the vulnerability exists.

References

https://www.qualys.com/2021/01/26/cve-2021-3156/baron-samedit-heap-based-overflow-sudo.txt

Analysis

Placeholder, currently debugging and analyzing. Link to blog will be posted after analysis is complete.