[USN-7396-1] OVN vulnerability

[Marc Deslauriers]

==========================================================================
Ubuntu Security Notice USN-7396-1
March 31, 2025

ovn vulnerability
==========================================================================

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

- Ubuntu 24.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

OVN would allow unintended access to the network.

Software Description:
- ovn: system to support virtual network abstraction

Details:

Marius Berntsberg, Trygve Vea, Tore Anderson, Rodolfo Alonso, Jay Faulkner,
and Brian Haley discovered that OVN incorrectly handled certain crafted UDP
packets. A remote attacker could possibly use this issue to bypass egress
ACL rules.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 24.10
   ovn-central                     24.09.0-1ubuntu0.1
   ovn-common                      24.09.0-1ubuntu0.1
   ovn-docker                      24.09.0-1ubuntu0.1
   ovn-host                        24.09.0-1ubuntu0.1
   ovn-ic                          24.09.0-1ubuntu0.1

Ubuntu 24.04 LTS
   ovn-central                     24.03.2-0ubuntu0.24.04.2
   ovn-common                      24.03.2-0ubuntu0.24.04.2
   ovn-docker                      24.03.2-0ubuntu0.24.04.2
   ovn-host                        24.03.2-0ubuntu0.24.04.2
   ovn-ic                          24.03.2-0ubuntu0.24.04.2

Ubuntu 22.04 LTS
   ovn-central                     22.03.3-0ubuntu0.22.04.5
   ovn-common                      22.03.3-0ubuntu0.22.04.5
   ovn-docker                      22.03.3-0ubuntu0.22.04.5
   ovn-host                        22.03.3-0ubuntu0.22.04.5
   ovn-ic                          22.03.3-0ubuntu0.22.04.5

Ubuntu 20.04 LTS
   ovn-central                     20.03.2-0ubuntu0.20.04.6
   ovn-common                      20.03.2-0ubuntu0.20.04.6
   ovn-docker                      20.03.2-0ubuntu0.20.04.6
   ovn-host                        20.03.2-0ubuntu0.20.04.6
   ovn-ic                          20.03.2-0ubuntu0.20.04.6

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

References:
   https://ubuntu.com/security/notices/USN-7396-1
   CVE-2025-0650

Package Information:
   https://launchpad.net/ubuntu/+source/ovn/24.09.0-1ubuntu0.1
   https://launchpad.net/ubuntu/+source/ovn/24.03.2-0ubuntu0.24.04.2
   https://launchpad.net/ubuntu/+source/ovn/22.03.3-0ubuntu0.22.04.5
   https://launchpad.net/ubuntu/+source/ovn/20.03.2-0ubuntu0.20.04.6

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