CVE-2021-26928 Missing authorization in n/a
BIRD lacks BGP peer password authentication, allowing attackers to redirect routes for denial of service or information disclosure.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-26928?
CVE-2021-26928 is a medium-severity missing authorization vulnerability in n/a, published on 4 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
BIRD through 2.0.7 does not provide functionality for password authentication of BGP peers. Because of this, products that use BIRD (which may, for example, include Tigera products in some configurations, as well as products of other vendors) may have been susceptible to route redirection for Denial of Service and/or Information Disclosure. NOTE: a researcher has asserted that the behavior is within Tigera’s area of responsibility; however, Tigera disagrees
Weakness: CWE-306
Which versions are affected by CVE-2021-26928?
It affects 1 product.
Products include Nic Bird.
How do I fix CVE-2021-26928?
No fix has been published for CVE-2021-26928 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-26928 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-26928 exists.
Sources
Also known as GHSA-cx5r-6jgc-m635.