Heap-based Buffer Overflow Affecting grub2-pc-modules package, versions <1:2.02-142.el8_7.1
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Test your applications- Snyk ID SNYK-CENTOS8-GRUB2PCMODULES-3121436
- published 16 Nov 2022
- disclosed 15 Nov 2022
How to fix?
Upgrade Centos:8 grub2-pc-modules to version 1:2.02-142.el8_7.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream grub2-pc-modules package and not the grub2-pc-modules package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
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.