What is CVE-2020-7453?

CVE-2020-7453 is a medium-severity vulnerability in Freebsd, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 6.0/10. Published 2020-04-29.

How severe is CVE-2020-7453?

Medium severity. CVSS v3 base score is 6.0 out of 10.

Vulnerability in Freebsd

CVE-2020-7453

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.

EPSS: 0.003 (26.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

Affected products

Freebsd — versions 11.3, 12.1
N/a Freebsd — versions 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

Weakness classification (CWE)

CWE-754 — Improper Check for Unusual or Exceptional Conditions

References

secteam@freebsd.org (x_refsource_CONFIRM, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2020-7453?: CVE-2020-7453 is a medium-severity vulnerability in Freebsd, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 6.0/10. Published 2020-04-29.
How severe is CVE-2020-7453?: Medium severity. CVSS v3 base score is 6.0 out of 10.