CVE-2022-28735
Publication date 20 July 2023
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
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.
Status
Package | Ubuntu Release | Status |
---|---|---|
grub2 | 24.10 oracular |
Not affected
|
24.04 LTS noble |
Not affected
|
|
22.04 LTS jammy |
Not affected
|
|
20.04 LTS focal |
Not affected
|
|
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial |
Not affected
|
|
14.04 LTS trusty |
Not affected
|
|
grub2-signed | 24.10 oracular |
Not affected
|
24.04 LTS noble |
Not affected
|
|
22.04 LTS jammy |
Fixed 1.187.3~22.04.1
|
|
20.04 LTS focal |
Fixed 1.187.3~20.04.1
|
|
18.04 LTS bionic |
Fixed 1.187.3~18.04.1
|
|
16.04 LTS xenial |
Vulnerable
|
|
14.04 LTS trusty | Ignored end of ESM support, was needs-triage | |
grub2-unsigned | 24.10 oracular |
Not affected
|
24.04 LTS noble |
Not affected
|
|
22.04 LTS jammy |
Fixed 2.06-2ubuntu14.1
|
|
20.04 LTS focal |
Fixed 2.06-2ubuntu14.1
|
|
18.04 LTS bionic |
Fixed 2.06-2ubuntu14.1
|
|
16.04 LTS xenial |
Vulnerable
|
|
14.04 LTS trusty | Not in release |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.7 · Medium |
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 |
References
Related Ubuntu Security Notices (USN)
- USN-6355-1
- GRUB2 vulnerabilities
- 8 September 2023