CVE-2024-6437 Security feature bypass in EOS - BGP Flowspec
Attackers can bypass traffic redirection policies on Arista EOS by sending crafted IPv4 packets with options, causing them to be routed incorrectly.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-6437?
CVE-2024-6437 is a medium-severity vulnerability in Arista Networks EOS - BGP Flowspec, published on 10 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
On affected platforms running Arista EOS with one of the following features configured to redirect IP traffic to a next hop: policy-based routing (PBR), BGP Flowspec, or interface traffic policy -- certain IP traffic such as IPv4 packets with IP options may bypass the feature's set nexthop action and be slow-path forwarded (FIB routed) by the kernel as the packets are trapped to the CPU instead of following the redirect action's destination.
Which versions are affected by CVE-2024-6437?
How do I fix CVE-2024-6437?
No fix has been published for CVE-2024-6437 yet. Limit exposure of the affected software until one is available.
Is CVE-2024-6437 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-6437 exists.
Sources
Also known as GHSA-hfcw-xhvg-j7v5.