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Ubuntu: USN-4269-1 (CVE-2019-3843): systemd vulnerabilities

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Ubuntu: USN-4269-1 (CVE-2019-3843): systemd vulnerabilities

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
04/26/2019
Created
02/08/2020
Added
02/06/2020
Modified
01/20/2021

Description

It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allowed to run as the transient service UID/GID even after the service is terminated. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the UID/GID will be recycled.

Solution(s)

  • ubuntu-upgrade-systemd

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