CVE-2020-7453

MEDIUM

FreeBSD Kernel Memory Disclosure via Jail osrelease Configuration

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References
Patch, Vendor Advisory x_refsource_confirm
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:08.jail.asc

Scores

CVSS v3 6.0
EPSS 0.0006
EPSS Percentile 19.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Details

CWE
CWE-754
Status published
Products (2)
freebsd/freebsd 11.3 (7 CPE variants)
freebsd/freebsd 12.1 (3 CPE variants)
Published Apr 29, 2020
Tracked Since Feb 18, 2026