Ubuntu: Security Advisory for systemd (USN-4269-1)

Published: 2020-02-06 04:00:14
CVE Author: NIST National Vulnerability Database (NVD)

CVSS Base Vector:
AV:L/AC:L/Au:N/C:P/I:P/A:P

Summary:
The remote host is missing an update for the 'systemd' Linux Distribution Package(s) announced via the USN-4269-1 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
It was discovered that systemd incorrectly handled certain PIDFile files. A local attacker could possibly use this issue to trick systemd into killing privileged processes. This issue only affected Ubuntu 16.04 LTS. (CVE-2018-16888) It was discovered that systemd incorrectly handled certain udevadm trigger commands. A local attacker could possibly use this issue to cause systemd to consume resources, leading to a denial of service. (CVE-2019-20386) Jann Horn discovered that systemd incorrectly handled services that use the DynamicUser property. A local attacker could possibly use this issue to access resources owned by a different service in the future. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-3843, CVE-2019-3844) Tavis Ormandy discovered that systemd incorrectly handled certain Polkit queries. A local attacker could use this issue to cause systemd to crash, resulting in a denial of service, or possibly execute arbitrary code and escalate privileges. (CVE-2020-1712)

Affected Versions:
'systemd' Linux Distribution Package(s) on Ubuntu 19.10, Ubuntu 18.04 LTS, Ubuntu 16.04 LTS.

Recommendations:
Please install the updated Linux Distribution Package(s).

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2018-16888
https://nvd.nist.gov/vuln/detail/CVE-2019-20386
https://nvd.nist.gov/vuln/detail/CVE-2019-3843
https://nvd.nist.gov/vuln/detail/CVE-2019-3844
https://nvd.nist.gov/vuln/detail/CVE-2020-1712

References:

https://lists.ubuntu.com/archives/ubuntu-security-announce/2020-February/005316.html

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Severity
Medium
CVSS Score
4.6

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