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Unscored USN-4263-1 1 CVE

sudo vulnerability

Published Feb 3, 2020 · Updated Feb 10, 2026

Summary

Joe Vennix discovered that Sudo incorrectly handled memory operations when
the pwfeedback option is enabled. A local attacker could possibly use this
issue to obtain unintended access to the administrator account.

Fixed packages 2

ReleasePackageFixed in
Ubuntu · 16.04 LTS 16.04:LTS sudo 1.8.16-0ubuntu1.9
Ubuntu · 18.04 LTS 18.04:LTS sudo 1.8.21p2-3ubuntu1.2

Vulnerabilities 1

  • Unscored —
    CVE-2019-18634 Public exploit EPSS 19%

    In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the…

References

  • report
    https://ubuntu.com/security/CVE-2019-18634