CVE-2020-7453 — MEDIUM (6.0)

Vulnerability 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.

CVSS Score

6.0

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Freebsd	Freebsd	11.3

Related Weaknesses (CWE)

CWE-754

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:08.jail.ascPatchVendor Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:08.jail.ascPatchVendor Advisory

FAQ

What is CVE-2020-7453?

CVE-2020-7453 is a vulnerability with a CVSS score of 6.0 (MEDIUM). 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 config...

How severe is CVE-2020-7453?

CVE-2020-7453 has been rated MEDIUM with a CVSS base score of 6.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-7453?

Check the references section above for vendor advisories and patch information. Affected products include: Freebsd Freebsd.