USN-5395-2: networkd-dispatcher regression

Releases

• Ubuntu 22.04 LTS
• Ubuntu 21.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• networkd-dispatcher - Dispatcher service for systemd-networkd connection status changes

Details

USN-5395-1 fixed vulnerabilities in networkd-dispatcher. Unfortunately
that update was incomplete and could introduce a regression. This update
fixes the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that networkd-dispatcher incorrectly handled internal
scripts. A local attacker could possibly use this issue to cause a race
condition, escalate privileges and execute arbitrary code.
(CVE-2022-29799, CVE-2022-29800)

Update instructions

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

Ubuntu 22.04

• networkd-dispatcher - 2.1-2ubuntu0.22.04.2

Ubuntu 21.10

• networkd-dispatcher - 2.1-2ubuntu0.21.10.2

Ubuntu 20.04

• networkd-dispatcher - 2.1-2~ubuntu20.04.3

Ubuntu 18.04

• networkd-dispatcher - 1.7-0ubuntu3.5

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

References

• https://launchpad.net/bugs/1971550