cve/2022/CVE-2022-2601.md

CVE-2022-2601

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.

POC

Reference

No PoCs from references.

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/EuroLinux/shim-review
• https://github.com/Jurij-Ivastsuk/WAXAR-shim-review
• https://github.com/NaverCloudPlatform/shim-review
• https://github.com/Rodrigo-NR/shim-review
• https://github.com/coreyvelan/shim-review
• https://github.com/ctrliq/ciq-shim-build
• https://github.com/ctrliq/shim-review
• https://github.com/denis-jdsouza/wazuh-vulnerability-report-maker
• https://github.com/lenovo-lux/shim-review
• https://github.com/neppe/shim-review
• https://github.com/rhboot/shim-review
• https://github.com/seal-community/patches
• https://github.com/vathpela/shim-review