Vulnerability · Published Apr 28, 2020 · Assigned by freebsd

CVE-2020-7453

Medium 6.0

In plain English

A medium-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 0.3% (higher than 28% of all known vulnerabilities).

Severity (CVSS NVD)6.0Medium

Exploit odds (30 days)0.3%top 72.4% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

In FreeBSD 12.1-STABLE before r359021, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r359020, and 11.3-RELEASE before 11.3-RELEASE-p7, a missing null termination check in the jail_set configuration option "osrelease" may return more bytes with a subsequent jail_get system call allowing a malicious jail superuser with permission to create nested jails to read kernel memory.

Affected products (as reported)

Vendor	Product	Versions
n/a	FreeBSD	12.1-STABLE before r359021, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r359020, 11.3-RELEASE before 11.3-RELEASE-p7

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:08.jail.asc x_refsource_CONFIRM