PT-2020-19589 · Freebsd · Freebsd

Published 2020-03-19 · Updated 2020-05-06 · CVE-2020-7453

Positive Technologies (AI Summary)

CVSS v3.1

6.0

Medium

Base vector

AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions FreeBSD versions 12.1-STABLE before r359021 FreeBSD versions 12.1-RELEASE before 12.1-RELEASE-p3 FreeBSD versions 11.3-STABLE before r359020 FreeBSD versions 11.3-RELEASE before 11.3-RELEASE-p7

Description A missing null termination check in the osrelease configuration option of the jail set function 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.

Recommendations For FreeBSD versions 12.1-STABLE before r359021, update to a version after r359021 to resolve the issue. For FreeBSD versions 12.1-RELEASE before 12.1-RELEASE-p3, update to 12.1-RELEASE-p3 or later to resolve the issue. For FreeBSD versions 11.3-STABLE before r359020, update to a version after r359020 to resolve the issue. For FreeBSD versions 11.3-RELEASE before 11.3-RELEASE-p7, update to 11.3-RELEASE-p7 or later to resolve the issue.

Fix

Improper Check for Exceptional Conditions

Weakness Enumeration

CWE-754

Related Identifiers

CVE-2020-7453

FREEBSD-SA-20_08

Affected Products

Freebsd

References · 5

• https://osv.dev/vulnerability/CVE-2020-7453 · Vendor Advisory
• https://security.freebsd.org/advisories/FreeBSD-SA-20:08.jail.asc · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-7453 · Security Note
• https://t.me/cvenotify/3368 · Telegram Post
• https://freebsd.org/security/advisories/FreeBSD-SA-20:08.jail.asc · Note