CVE-2022-28735 is a high-severity vulnerability affecting GRUB2, specifically its shim_lock verifier, which permits the loading of unverified non-kernel files on secure boot systems. This flaw allows malicious code to bypass secure boot protections, potentially compromising the system's integrity. With a CVSS score of 7.8, it signifies a local attack vector with low complexity, leading to high impacts on confidentiality, integrity, and availability. Currently, there is no public exploit code available, nor is it listed in CISA's KEV catalog, and it has garnered minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2.00, < 2.06-3CPE matchmatch criteria | cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
CVE-2022-28735
Jun 11, 2024The 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.
Jul 11, 2023grub2: shim_lock verifier allows non-kernel files to be loaded
Jun 7, 2022