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Alerts This Week
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Ubuntu 5226-1: Systemd Crash Advisory and Fix Instructions

ubuntu
Calendar Grey January 13, 2022
Dist Ubuntu Esm H88
Ubuntu Security Alert USN-5226-1 tackles a systemd flaw that can cause failures. Ensure your systems are updated immediately!
systemd-tmpfiles could be made to crash or have other unspecified impacts.

Summary

systemd-tmpfiles could be made to crash or have other unspecified impacts.

Software Description:

- 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.

Topics%20covered

Topics Covered

security advisory Ubuntu system crash systemd service manager

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 LTS:
  systemd                         245.4-4ubuntu3.15

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

References

https://ubuntu.com/security/notices/USN-5226-1

CVE-2021-3997

Severity
critical
Lowest
Low
Medium
High
Critical

January 13, 2022

Topics%20covered

Topics Covered

security advisory Ubuntu system crash systemd service manager

Package Information

https://launchpad.net/ubuntu/+source/systemd/248.3-1ubuntu8.2
https://launchpad.net/ubuntu/+source/systemd/247.3-3ubuntu3.7
https://launchpad.net/ubuntu/+source/systemd/245.4-4ubuntu3.15

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