A FRR security update has been released for Ubuntu Linux 22.04 LTS, 23.04, and 23.10.

[USN-6481-1] FRR vulnerabilities

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Ubuntu Security Notice USN-6481-1
November 15, 2023

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

- Ubuntu 23.10
- Ubuntu 23.04
- Ubuntu 22.04 LTS

Summary:

FRR could be made to crash if it received specially crafted network
traffic.

Software Description:
- frr: FRRouting suite of internet protocols

Details:

It was discovered that FRR incorrectly handled certain malformed NLRI data.
A remote attacker could possibly use this issue to cause FRR to crash,
resulting in a denial of service. (CVE-2023-46752)

It was discovered that FRR incorrectly handled certain BGP UPDATE messages.
A remote attacker could possibly use this issue to cause FRR to crash,
resulting in a denial of service. (CVE-2023-46753)

Update instructions:

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

Ubuntu 23.10:
frr 8.4.4-1.1ubuntu1.1

Ubuntu 23.04:
frr 8.4.2-1ubuntu1.5

Ubuntu 22.04 LTS:
frr 8.1-1ubuntu1.7

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

References:
https://ubuntu.com/security/notices/USN-6481-1
CVE-2023-46752, CVE-2023-46753

Package Information:
https://launchpad.net/ubuntu/+source/frr/8.4.4-1.1ubuntu1.1
https://launchpad.net/ubuntu/+source/frr/8.4.2-1ubuntu1.5
https://launchpad.net/ubuntu/+source/frr/8.1-1ubuntu1.7