==========================================================================
Ubuntu Security Notice USN-4269-1
February 05, 2020

systemd vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 19.10
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in systemd.

Software Description:
– systemd: system and service manager

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)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 19.10:
systemd 242-7ubuntu3.6

Ubuntu 18.04 LTS:
systemd 237-3ubuntu10.38

Ubuntu 16.04 LTS:
systemd 229-4ubuntu21.27

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
https://usn.ubuntu.com/4269-1
CVE-2018-16888, CVE-2019-20386, CVE-2019-3843, CVE-2019-3844,
CVE-2020-1712

Package Information:
https://launchpad.net/ubuntu/+source/systemd/242-7ubuntu3.6
https://launchpad.net/ubuntu/+source/systemd/237-3ubuntu10.38
https://launchpad.net/ubuntu/+source/systemd/229-4ubuntu21.27

—–BEGIN PGP SIGNATURE—–
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=V8xb
—–END PGP SIGNATURE—–
—