CVE-2021-28505 Security feature bypass in EOS
Attackers can bypass IP protocol restrictions in access lists containing VXLAN rules on Arista EOS devices, potentially allowing unauthorized traffic.
- 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-2021-28505?
CVE-2021-28505 is a high-severity vulnerability in Arista Networks EOS, published on 14 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol.
Which versions are affected by CVE-2021-28505?
It affects 1 product.
Products include Arista Eos.
How do I fix CVE-2021-28505?
No fix has been published for CVE-2021-28505 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-28505 being exploited?
There is no known exploitation of CVE-2021-28505 in the wild and no public exploit code.
Other vulnerabilities in Arista Networks EOS
Sources
Also known as GHSA-3p5w-c6fg-w249.