CVE-2025-1125

medium

Description

When reading data from a hfs filesystem, grub's hfs filesystem module uses user-controlled parameters from the filesystem metadata to calculate the internal buffers size, however it misses to properly check for integer overflows. A maliciouly crafted filesystem may lead some of those buffer size calculation to overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result the hfsplus_open_compressed_real() function will write past of the internal buffer length. This flaw may be leveraged to corrupt grub's internal critical data and may result in arbitrary code execution by-passing secure boot protections.

References

https://www.bleepingcomputer.com/news/security/microsoft-uses-ai-to-find-flaws-in-grub2-u-boot-barebox-bootloaders/

https://lists.gnu.org/archive/html/grub-devel/2025-02/msg00024.html

https://bugzilla.redhat.com/show_bug.cgi?id=2346138

https://access.redhat.com/security/cve/CVE-2025-1125

Details

Source: Mitre, NVD

Published: 2025-03-03

Updated: 2025-03-05

Risk Information

CVSS v2

Base Score: 5.9

Vector: CVSS2#AV:L/AC:H/Au:M/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 6.4

Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Severity: Medium