GRUB2 Exit Issue Leads to Use-After-Free Condition and Potential Secure Boot Bypass
CVE-2024-2312

6.7MEDIUM

Key Information:

Vendor

Debian
Status
Debian Based Gnu Grub
Vendor
CVE Published:
5 April 2024

What is CVE-2024-2312?

GRUB2 does not call the module fini functions on exit, leading to Debian/Ubuntu's peimage GRUB2 module leaving UEFI system table hooks after exit. This lead to a use-after-free condition, and could possibly lead to secure boot bypass.

Affected Version(s)

Debian based GNU GRUB Linux 0 < 2.12-1ubuntu5

References

https://bugs.launchpad.net/ubuntu/+source/grub2-unsigned/...
issue-tracking
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-2312
issue-tracking
https://security.netapp.com/advisory/ntap-20240426-0003/

CVSS V3.1

Score:
6.7
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

Credit

Mate Kukri
.