| Name | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3190-1, DLA-3190-2, DSA-5280-1, ELA-760-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| grub2 (PTS) | jessie, jessie (lts) | 2.02~beta2-22+deb8u2 | vulnerable |
| stretch (lts), stretch | 2.02~beta3-5+deb9u3 | fixed | |
| buster (security), buster, buster (lts) | 2.06-3~deb10u4 | fixed | |
| bullseye (security), bullseye | 2.06-3~deb11u6 | fixed | |
| bookworm (security), bookworm | 2.06-13+deb12u1 | fixed | |
| sid, trixie | 2.12-5 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| grub2 | source | stretch | 2.02~beta3-5+deb9u3 | ELA-760-1 | ||
| grub2 | source | buster | 2.06-3~deb10u3 | DLA-3190-2 | ||
| grub2 | source | bullseye | 2.06-3~deb11u4 | DSA-5280-1 | ||
| grub2 | source | (unstable) | 2.06-5 |
https://lists.gnu.org/archive/html/grub-devel/2022-11/msg00059.html
[jessie] - grub2 <ignored> (Newer GCC version required, patches partly applied in ELA-763-1)