GNU GRUB up to 2.12-1ubuntu4 on Debian UEFI System Table use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.80

Summaryinfo

A vulnerability was found in GNU GRUB up to 2.12-1ubuntu4 on Debian. It has been rated as critical. This affects an unknown part of the component UEFI System Table. This manipulation causes use after free. This vulnerability is registered as CVE-2024-2312. The attack needs to be launched locally. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in GNU GRUB up to 2.12-1ubuntu4 on Debian. Affected by this vulnerability is an unknown function of the component UEFI System Table. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was published by Mate Kukri. The advisory is shared at bugs.launchpad.net. This vulnerability is known as CVE-2024-2312 since 03/07/2024. The exploitation appears to be easy. An attack has to be approached locally. The exploitation requires an enhanced level of successful authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 300834 (SUSE SLED15 / SLES15 / openSUSE 15 Security Update : shim (SUSE-SU-2026:0741-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.12-1ubuntu5 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (300834). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 6.7
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.7
CNA Vector (Canonical Ltd.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 300834
Nessus Name: SUSE SLED15 / SLES15 / openSUSE 15 Security Update : shim (SUSE-SU-2026:0741-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: GRUB 2.12-1ubuntu5

Timelineinfo

03/07/2024 🔍
04/05/2024 +28 days 🔍
04/05/2024 +0 days 🔍
03/05/2026 +699 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: bugs.launchpad.net
Researcher: Mate Kukri
Status: Confirmed

CVE: CVE-2024-2312 (🔍)
GCVE (CVE): GCVE-0-2024-2312
GCVE (VulDB): GCVE-100-259525

Entryinfo

Created: 04/05/2024 21:53
Updated: 03/05/2026 22:59
Changes: 04/05/2024 21:53 (65), 05/10/2024 08:33 (1), 08/30/2024 11:40 (2), 03/05/2026 22:59 (3)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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