| Name | CVE-2021-20225 |
| Description | A flaw was found in grub2 in versions prior to 2.06. The option parser allows an attacker to write past the end of a heap-allocated buffer by calling certain commands with a large number of specific short forms of options. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-4867-1 |
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 |
| 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 |
|---|
| grub2 | source | buster | 2.02+dfsg1-20+deb10u4 | | DSA-4867-1 | |
| grub2 | source | (unstable) | 2.04-16 | | | |
Notes
[stretch] - grub2 <ignored> (No SecureBoot support in stretch)