=========================================================================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