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 |
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)
|
|
noble |
Not vulnerable
(does not affect Secure Boot)
|
|
trusty |
Not vulnerable
(does not affect Secure Boot)
|
|
upstream |
Released
(2.06-3)
|
|
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)
|
|
noble |
Not vulnerable
(1.193)
|
|
trusty |
Needs triage
|
|
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)
|
|
noble |
Not vulnerable
(2.06-2ubuntu17)
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
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 |