CVE-2022-28735
Published: 20 July 2023
The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
grub2 Launchpad, Ubuntu, Debian |
jammy |
Needed
|
| lunar |
Not vulnerable
(2.06-2ubuntu16)
|
|
| bionic |
Needed
|
|
| focal |
Needed
|
|
| kinetic |
Not vulnerable
(2.06-2ubuntu12)
|
|
| 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 | 6.7 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | High |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |