ALBA-2022:0355 frr bug fix update
An attacker can cause a denial of service by triggering crashes in the FRRouting daemon through invalid BFD configurations or specific network conditions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is ALBA-2022:0355?
ALBA-2022:0355 is a denial of service vulnerability in frr, published on 1 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
FRRouting is free software that manages TCP/IP based routing protocols. It takes a multi-server and multi-threaded approach to resolve the current complexity of the Internet. FRRouting supports BGP4, OSPFv2, OSPFv3, ISIS, RIP, RIPng, PIM, NHRP, PBR, EIGRP, and BFD.
Bug Fix(es):
FRR reloader generating invalid BFD configurations, exits with error (BZ#2031077)
Bfdd crash in metallb CI (BZ#2037200)
Which versions are affected by ALBA-2022:0355?
Linux distribution packages (1)
frr AlmaLinux:8 | All versions | 7.5-4.el8_5.2 |
How do I fix ALBA-2022:0355?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is ALBA-2022:0355 being exploited?
There is no known exploitation of ALBA-2022:0355 in the wild and no public exploit code.