CVE-2020-25584 Race condition in FreeBSD
A superuser in a FreeBSD jail with non-default mount permissions can exploit a race condition to escape the jail and access the host filesystem.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-25584?
CVE-2020-25584 is a high-severity vulnerability in Freebsd Freebsd, published on 7 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In FreeBSD 13.0-STABLE before n245118, 12.2-STABLE before r369552, 11.4-STABLE before r369560, 13.0-RC5 before p1, 12.2-RELEASE before p6, and 11.4-RELEASE before p9, a superuser inside a FreeBSD jail configured with the non-default allow.mount permission could cause a race condition between the lookup of ".." and remounting a filesystem, allowing access to filesystem hierarchy outside of the jail.
Weakness: CWE-362
Which versions are affected by CVE-2020-25584?
It affects 1 product.
Products include Freebsd Freebsd.
How do I fix CVE-2020-25584?
No fix has been published for CVE-2020-25584 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-25584 being exploited?
There is no known exploitation of CVE-2020-25584 in the wild and no public exploit code.
Other vulnerabilities in Freebsd Freebsd
Sources
Also known as GHSA-54rh-2mjp-cvmq.