cve/2022/CVE-2022-2601.md

### [CVE-2022-2601](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-2601)
![](https://img.shields.io/static/v1?label=Product&message=grub2&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-122-%3ECWE-787&color=brighgreen)

### 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