| Name | CVE-2009-4128 |
| Description | GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with the actual password, which makes it easier for physically proximate attackers to conduct brute force attacks and bypass authentication by submitting a password whose length is 1. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 555195 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| grub (PTS) | buster | 0.97-75 | fixed |
| bullseye | 0.97-77 | fixed |
| bookworm | 0.97-80 | fixed |
| sid, trixie | 0.97-81 | fixed |
| 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 |
| trixie | 2.12-2~deb13u1 | fixed |
| sid | 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 |
|---|
| grub | source | (unstable) | (not affected) | | | |
| grub2 | source | lenny | (not affected) | | | |
| grub2 | source | (unstable) | 1.97+20091115-1 | | | 555195 |
Notes
[lenny] - grub2 <not-affected> (Password authentication not yet present)
- grub <not-affected> (only affects grub2)