| Name | CVE-2023-4001 |
| Description | An authentication bypass flaw was found in GRUB due to the way that GRUB uses the UUID of a device to search for the configuration file that contains the password hash for the GRUB password protection feature. An attacker capable of attaching an external drive such as a USB stick containing a file system with a duplicate UUID (the same as in the "/boot/" file system) can bypass the GRUB password protection feature on UEFI systems, which enumerate removable drives before non-removable ones. This issue was introduced in a downstream patch in Red Hat's version of grub2 and does not affect the upstream package. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| grub2 (PTS) | buster | 2.06-3~deb10u1 | fixed |
| buster (security) | 2.06-3~deb10u4 | fixed |
| bullseye (security), bullseye | 2.06-3~deb11u6 | fixed |
| bookworm, bookworm (security) | 2.06-13+deb12u1 | fixed |
| sid, trixie | 2.12-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| grub2 | source | (unstable) | (not affected) | | | |
Notes
- grub2 <not-affected> (Specific to a downstream patch in Red Hat)
https://bugzilla.redhat.com/show_bug.cgi?id=2224951
https://bugzilla.redhat.com/show_bug.cgi?id=2223437
https://www.openwall.com/lists/oss-security/2024/01/15/3