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High 1 exploited CVE USN-4705-2 1 CVE

sudo vulnerability

Published Jan 27, 2021 · Updated Feb 10, 2026

Ecosystem: Ubuntu

Summary

USN-4705-1 fixed a vulnerability in Sudo. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that Sudo incorrectly handled memory when parsing command
lines. A local attacker could possibly use this issue to obtain unintended
access to the administrator account. (CVE-2021-3156)

Fixed packages 1

ReleasePackageFixed in
Ubuntu · Pro 14.04 LTS Pro:14.04:LTS sudo 1.8.9p5-1ubuntu1.5+esm6

Vulnerabilities 1

  • High 7.8
    CVE-2021-3156 Exploited Public exploit EPSS 100%

    Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privileg…

    sudo sudo sudo Debian Ubuntu Alpine
    KEV Apr 6, 2022

References

  • report
    https://ubuntu.com/security/CVE-2021-3156