CVE-2021-3697
Published: 6 July 2022
A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
grub2 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(does not affect Secure Boot)
|
| focal |
Not vulnerable
(does not affect Secure Boot)
|
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Not vulnerable
(does not affect Secure Boot)
|
|
| kinetic |
Not vulnerable
(does not affect Secure Boot)
|
|
| lunar |
Not vulnerable
(does not affect Secure Boot)
|
|
| mantic |
Not vulnerable
(does not affect Secure Boot)
|
|
| trusty |
Not vulnerable
(does not affect Secure Boot)
|
|
| upstream |
Needs triage
|
|
| xenial |
Not vulnerable
(does not affect Secure Boot)
|
|
|
grub2-signed Launchpad, Ubuntu, Debian |
bionic |
Released
(1.187.3~18.04.1)
|
| focal |
Released
(1.187.3~20.04.1)
|
|
| jammy |
Released
(1.187.3~22.04.1)
|
|
| kinetic |
Ignored
(end of life)
|
|
| lunar |
Not vulnerable
(1.192)
|
|
| mantic |
Not vulnerable
(1.193)
|
|
| trusty |
Needed
|
|
| upstream |
Needs triage
|
|
| xenial |
Needed
|
|
|
grub2-unsigned Launchpad, Ubuntu, Debian |
bionic |
Released
(2.06-2ubuntu14.1)
|
| focal |
Released
(2.06-2ubuntu14.1)
|
|
| jammy |
Released
(2.06-2ubuntu14.1)
|
|
| kinetic |
Ignored
(end of life)
|
|
| lunar |
Not vulnerable
(2.06-2ubuntu16)
|
|
| mantic |
Not vulnerable
(2.06-2ubuntu17)
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Needed
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.0 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |