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Red Hat: CVE-2019-18634: Stack based buffer overflow when pwfeedback is enabled (Multiple Advisories)

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Red Hat: CVE-2019-18634: Stack based buffer overflow when pwfeedback is enabled (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
01/29/2020
Created
02/15/2020
Added
02/14/2020
Modified
12/15/2023

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.

Solution(s)

  • redhat-upgrade-sudo
  • redhat-upgrade-sudo-debuginfo
  • redhat-upgrade-sudo-debugsource
  • redhat-upgrade-sudo-devel

References

  • DSA-4614
  • CVE-2019-18634
  • RHSA-2020:0487
  • RHSA-2020:0509
  • RHSA-2020:0540
  • RHSA-2020:0726

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