CVE-2021-28504 Security feature bypass in EOS
Attackers can bypass IPv4 access-list rules on Arista Strata devices when TCAM profile is enabled and VXLAN protocol is matched.
- 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-2021-28504?
CVE-2021-28504 is a high-severity vulnerability in Arista Networks EOS, published on 1 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
On Arista Strata family products which have “TCAM profile” feature enabled when Port IPv4 access-list has a rule which matches on “vxlan” as protocol then that rule and subsequent rules ( rules declared after it in ACL ) do not match on IP protocol field as expected.
Which versions are affected by CVE-2021-28504?
It affects 1 product.
Products include Arista Eos.
How do I fix CVE-2021-28504?
No fix has been published for CVE-2021-28504 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-28504 being exploited?
There is no known exploitation of CVE-2021-28504 in the wild and no public exploit code.
Other vulnerabilities in Arista Networks EOS
Sources
Also known as GHSA-2pcc-vj7h-7frv.