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LIN1021-4773 : Security Advisory - grub - CVE-2022-3775

Created: Nov 16, 2022    Updated: Dec 20, 2022
Resolved Date: Dec 1, 2022
Found In Version: 10.21.20.1
Fix Version: 10.21.20.15
Severity: Standard
Applicable for: Wind River Linux LTS 21
Component/s: Userspace

Description

When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.

https://nvd.nist.gov/vuln/detail/CVE-2022-3775

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