Vulnerability · Published Apr 7, 2021 · Assigned by freebsd

CVE-2020-25584

High 7.5

In plain English

A high-severity security flaw in FreeBSD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS NVD)7.5High

Exploit odds (30 days)0.2%top 91.7% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
n/a	FreeBSD	FreeBSD 12.2-RELEASE before p6, 11.4-RELEASE before p9

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-21:10.jail_mount.asc x_refsource_MISC
https://security.netapp.com/advisory/ntap-20210423-0009/ x_refsource_CONFIRM