USN-7230-3: FRR regression

Publication date

5 November 2026

Overview

USN-7230-2 introduced a regression in FRR


Packages

  • frr - FRRouting suite of internet protocols

Details

USN-7230-2 fixed vulnerabilities in FRR. Unfortunately, the fix for
CVE-2024-55553 introduced a regression in RPKI support, causing FRR to stop
processing RPKI updates after the first one, so routes were not revalidated
when RPKI data changed. In Ubuntu 20.04 LTS, the BGP daemon also failed to
start when the RPKI module was enabled. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Iggy Frankovic discovered that FRR incorrectly handled certain BGP
messages. A remote attacker could possibly use this issue to cause FRR to
crash, resulting in a denial of service. This issue only affected Ubuntu
20.04 LTS. (CVE-2024-44070)

It was discovered that FRR re-validated all routes in certain instances
when the internal socket's buffer size overflowed. A remote attacker could
possibly use this issue to...

USN-7230-2 fixed vulnerabilities in FRR. Unfortunately, the fix for
CVE-2024-55553 introduced a regression in RPKI support, causing FRR to stop
processing RPKI updates after the first one, so routes were not revalidated
when RPKI data changed. In Ubuntu 20.04 LTS, the BGP daemon also failed to
start when the RPKI module was enabled. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Iggy Frankovic discovered that FRR incorrectly handled certain BGP
messages. A remote attacker could possibly use this issue to cause FRR to
crash, resulting in a denial of service. This issue only affected Ubuntu
20.04 LTS. (CVE-2024-44070)

It was discovered that FRR re-validated all routes in certain instances
when the internal socket's buffer size overflowed. A remote attacker could
possibly use this issue to impact the performance of FRR, resulting in a
denial of service. (CVE-2024-55553)


Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
24.04 LTS noble frr-rpki-rtrlib –  8.4.4-1.1ubuntu6.8
22.04 LTS jammy frr-rpki-rtrlib –  8.1-1ubuntu1.17
20.04 LTS focal frr –  7.2.1-1ubuntu0.2+esm5  
frr-rpki-rtrlib –  7.2.1-1ubuntu0.2+esm5  

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