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FreeBSD: VID-B4E5F782-442D-11EA-9BA9-206A8A720317 (CVE-2019-18634): sudo -- Potential bypass of Runas user restrictions

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FreeBSD: VID-B4E5F782-442D-11EA-9BA9-206A8A720317 (CVE-2019-18634): sudo -- Potential bypass of Runas user restrictions

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
01/29/2020
Created
02/04/2020
Added
02/01/2020
Modified
02/28/2020

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)

  • freebsd-upgrade-package-sudo

References

  • CVE-2019-18634

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