frr regression

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)