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Ubuntu Security Notice USN-5395-1
April 28, 2022

networkd-dispatcher vulnerabilities

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

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

Summary:

Several security issues were fixed in networkd-dispatcher.

Software Description:

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

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 LTS:
networkd-dispatcher 2.1-2ubuntu0.22.04.1

Ubuntu 21.10:
networkd-dispatcher 2.1-2ubuntu0.21.10.1

Ubuntu 20.04 LTS:
networkd-dispatcher 2.1-2~ubuntu20.04.2

Ubuntu 18.04 LTS:
networkd-dispatcher 1.7-0ubuntu3.4

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

References:
https://ubuntu.com/security/notices/USN-5395-1
CVE-2022-29799, CVE-2022-29800

Package Information:

https://launchpad.net/ubuntu/+source/networkd-dispatcher/2.1-2ubuntu0.22.04.1

https://launchpad.net/ubuntu/+source/networkd-dispatcher/2.1-2ubuntu0.21.10.1

https://launchpad.net/ubuntu/+source/networkd-dispatcher/2.1-2~ubuntu20.04.2
https://launchpad.net/ubuntu/+source/networkd-dispatcher/1.7-0ubuntu3.4