USN-5395-2: networkd-dispatcher regression

USN-5395-2: networkd-dispatcher regression

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)
Source: USN-5395-2: networkd-dispatcher regression