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Ubuntu Security Notice USN-5395-2

Ubuntu Security Notice USN-5395-2
Posted May 4, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5395-2 - USN-5395-1 fixed vulnerabilities in networkd-dispatcher. Unfortunately that update was incomplete and could introduce a regression. This update fixes the problem. 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.

tags | advisory, arbitrary, local, vulnerability
systems | linux, ubuntu
SHA-256 | 58fe6e09901d65da7bbfb1aa330e18a95af76b41553f7b19884769fb5ddd04cf

Ubuntu Security Notice USN-5395-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5395-2
May 04, 2022

networkd-dispatcher regression
==========================================================================

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
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