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.
Details
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| enterprise-linux-eus | — | — |
| enterprise-linux-for-power-little-endian-eus | — | — |
| enterprise-linux-server-aus | — | — |
| enterprise-linux-server-for-power-little-endian-update-services-for-sap-solutions | — | — |
| enterprise-linux-server-tus | — | — |
| enterprise-linux-server-update-services-for-sap-solutions | — | — |
| fedora | — | — |
| grub2 | — | 2.06 |
References
Similar Threats
- Medium CVE-2022-24805
- Medium CVE-2022-24806
- Medium CVE-2022-24807
- Medium CVE-2022-24808
- Medium CVE-2022-24809
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