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LIN1021-4772 : Security Advisory - grub - CVE-2022-2601

Created: Nov 16, 2022    Updated: Dec 18, 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

A buffer overflow was found in grub_font_construct_glyph(). A malicious crafted pf2 font can lead to an overflow when calculating the max_glyph_size value, allocating a smaller than needed buffer for the glyph, this further leads to a buffer overflow and a heap based out-of-bounds write. An attacker may use this vulnerability to circumvent the secure boot mechanism.

https://nvd.nist.gov/vuln/detail/CVE-2022-2601

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