USN-5395-2: networkd-dispatcher regression
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Ubuntu Security Notice USN-5395-2
May 04, 2022
networkd-dispatcher regression
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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:
USN-5395-1 introduced a regression in networkd-dispatcher.
Software Description:
- 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 LTS:
networkd-dispatcher 2.1-2ubuntu0.22.04.2
Ubuntu 21.10:
networkd-dispatcher 2.1-2ubuntu0.21.10.2
Ubuntu 20.04 LTS:
networkd-dispatcher 2.1-2~ubuntu20.04.3
Ubuntu 18.04 LTS:
networkd-dispatcher 1.7-0ubuntu3.5
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5395-2
https://ubuntu.com/security/notices/USN-5395-1
https://launchpad.net/bugs/1971550
Package Information:
https://launchpad.net/ubuntu/+source/networkd-dispatcher/2.1-2ubuntu0.22.04.2
https://launchpad.net/ubuntu/+source/networkd-dispatcher/2.1-2ubuntu0.21.10.2
https://launchpad.net/ubuntu/+source/networkd-dispatcher/2.1-2~ubuntu20.04.3
https://launchpad.net/ubuntu/+source/networkd-dispatcher/1.7-0ubuntu3.5
A networkd-dispatcher regression update has been released for Ubuntu 18.04 LTS, 20.04 LTS, 21.10, and 22.04 LTS.
