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debiancveDebian Security Bug TrackerDEBIANCVE:CVE-2024-2312
HistoryApr 05, 2024 - 8:15 p.m.

CVE-2024-2312

2024-04-0520:15:09
Debian Security Bug Tracker
security-tracker.debian.org
4
grub2
uefi
system table
use-after-free
secure boot bypass
module

6.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

7.2 High

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.5%

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.

6.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

7.2 High

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.5%

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