#VU69394 Out-of-bounds write in grub - CVE-2022-2601
Published: November 16, 2022 / Updated: October 5, 2023
Vulnerability identifier: #VU69394
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2022-2601
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
grub
grub
Software vendor:
GNU
GNU
Description
The vulnerability allows an attacker to bypass implemented security restrictions.
The vulnerability exists due to a boundary error within the grub_font_construct_glyph() function when handling pf2 font. An attacker with physical access to the affected system can trigger an out-of-bounds write and bypass secure boot restrictions.
Remediation
Install update from vendor's website.