#VU26239 Resource management error in FreeBSD - CVE-2020-7453
Published: March 19, 2020
Vulnerability identifier: #VU26239
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-7453
CWE-ID: CWE-399
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
FreeBSD
FreeBSD
Software vendor:
FreeBSD Foundation
FreeBSD Foundation
Description
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a missing NUL-termination check for the jail_set(2) configration option "osrelease" that leads disclosure of additional bytes of kernel memory than was originally set. A local privileges user inside a non-default jail, e.g. setting of children.max > 0 ("nested jails"), can read exposed kernel memory.
Remediation
Install updates from vendor's website.