CVE-2021-28507 Auth bypass in EOS
Attackers can bypass service ACLs on OpenConfig interfaces in Arista EOS, allowing unauthorized requests to reach the agent.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-28507?
CVE-2021-28507 is a medium-severity authentication bypass vulnerability in Arista Networks EOS, published on 14 Jan 2022. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
An issue has recently been discovered in Arista EOS where, under certain conditions, the service ACL configured for OpenConfig gNOI and OpenConfig RESTCONF might be bypassed, which results in the denied requests being forwarded to the agent.
Weakness: CWE-284
Which versions are affected by CVE-2021-28507?
It affects 1 product.
Products include Arista Eos.
How do I fix CVE-2021-28507?
No fix has been published for CVE-2021-28507 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-28507 being exploited?
There is no known exploitation of CVE-2021-28507 in the wild and no public exploit code.
Other vulnerabilities in Arista Networks EOS
Sources
Also known as GHSA-4j73-jx76-fgw8.