Buffer overflow in FreeBSD - CVE-2021-29632
Published: January 11, 2022
Vulnerability identifier: #VU59468
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-29632
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: FreeBSD Foundation
Affected software:
FreeBSD
FreeBSD
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in vt console when processing the highlight buffer while text is scrolling on the console. A local user can trigger buffer overflow and overwrite data structures, associated with the system console or other kernel memory.
How to mitigate CVE-2021-29632
Install updates from vendor's website.