USN-5226-1: systemd vulnerability

Releases

• Ubuntu 21.10
• Ubuntu 21.04
• Ubuntu 20.04 LTS

Packages

• systemd - system and service manager

Details

It was discovered that systemd-tmpfiles employed uncontrolled recursion
when removing deeply nested directory hierarchies. A local attacker could
exploit this to cause systemd-tmpfiles to crash or have other unspecified
impacts.

Update instructions

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

Ubuntu 21.10

• systemd - 248.3-1ubuntu8.2

Ubuntu 21.04

• systemd - 247.3-3ubuntu3.7

Ubuntu 20.04

• systemd - 245.4-4ubuntu3.15

In general, a standard system update will make all the necessary changes.

References

• CVE-2021-3997