CVE-2020-25580 Auth bypass in FreeBSD

Medium 5.3 Published 26 Mar 2021 Updated 4 Aug 2024

A regression in FreeBSD's login.access rule processor causes access denial rules to be ignored, potentially allowing unauthorized access.

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-2020-25580?

CVE-2020-25580 is a medium-severity authentication bypass vulnerability in Freebsd Freebsd, published on 26 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In FreeBSD 12.2-STABLE before r369346, 11.4-STABLE before r369345, 12.2-RELEASE before p4 and 11.4-RELEASE before p8 a regression in the login.access(5) rule processor has the effect of causing rules to fail to match even when they should not. This means that rules denying access may be ignored.

Weakness: CWE-697

Which versions are affected by CVE-2020-25580?

It affects 1 product.

Products include Freebsd Freebsd.

How do I fix CVE-2020-25580?

No fix has been published for CVE-2020-25580 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-2020-25580 being exploited?

There is no known exploitation of CVE-2020-25580 in the wild and no public exploit code.

All Freebsd Freebsd vulnerabilities

Sources

Also known as GHSA-35hv-73jw-phfp.