CVE-2022-28736
Published: 20 July 2023
There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2's memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
grub2 Launchpad, Ubuntu, Debian |
jammy |
Needed
|
| kinetic |
Not vulnerable
(2.06-2ubuntu12)
|
|
| lunar |
Not vulnerable
(2.06-2ubuntu16)
|
|
| bionic |
Needed
|
|
| focal |
Needed
|
|
| upstream |
Released
(2.06-3)
|
|
| impish |
Ignored
(end of life)
|
|
|
grub2-unsigned Launchpad, Ubuntu, Debian |
trusty |
Does not exist
|
| jammy |
Pending
(2.06-2ubuntu14.1)
|
|
| upstream |
Needs triage
|
|
| bionic |
Pending
(2.06-2ubuntu14.1)
|
|
| focal |
Pending
(2.06-2ubuntu14.1)
|
|
| kinetic |
Ignored
(end of life)
|
|
| lunar |
Not vulnerable
(2.06-2ubuntu16)
|
|
| xenial |
Needed
|
|
|
grub2-signed Launchpad, Ubuntu, Debian |
trusty |
Needs triage
|
| kinetic |
Ignored
(end of life)
|
|
| lunar |
Not vulnerable
(1.192)
|
|
| upstream |
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)
|
|
| xenial |
Needed
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.4 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | High |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H |