CVE-2022-3775
Published: 19 December 2022
When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
grub2-unsigned Launchpad, Ubuntu, Debian |
trusty |
Does not exist
|
| xenial |
Needs triage
|
|
| bionic |
Pending
(2.06-2ubuntu14)
|
|
| focal |
Pending
(2.06-2ubuntu14)
|
|
| jammy |
Pending
(2.06-2ubuntu14)
|
|
| kinetic |
Ignored
(end of life)
|
|
| lunar |
Released
(2.06-2ubuntu15)
|
|
| upstream |
Needs triage
|
|
|
grub2-signed Launchpad, Ubuntu, Debian |
trusty |
Needs triage
|
| xenial |
Needs triage
|
|
| bionic |
Pending
(1.187.3~18.04.1)
|
|
| focal |
Pending
(1.187.3~20.04.1)
|
|
| jammy |
Pending
(1.187.3~22.04.1)
|
|
| kinetic |
Ignored
(end of life)
|
|
| lunar |
Not vulnerable
(1.192)
|
|
| upstream |
Needs triage
|
|
|
grub2 Launchpad, Ubuntu, Debian |
kinetic |
Ignored
(end of life, was needed)
|
| jammy |
Needed
|
|
| trusty |
Needs triage
|
|
| xenial |
Needs triage
|
|
| upstream |
Released
(2.06-5)
|
|
| bionic |
Needed
|
|
| focal |
Needed
|
|
| lunar |
Released
(2.06-2ubuntu14)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.1 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |