vulnerability

Huawei EulerOS: CVE-2025-0678: grub2 security update

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
Mar 3, 2025
Added
May 13, 2025
Modified
May 14, 2025

Description

A flaw was found in grub2. When reading data from a squash4 filesystem, grub's squash4 fs module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciously crafted filesystem may lead some of those buffer size calculations to overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result, the direct_read() will perform a heap based out-of-bounds write during data reading. This flaw may be leveraged to corrupt grub's internal critical data and may result in arbitrary code execution, by-passing secure boot protections.

Solution(s)

huawei-euleros-2_0_sp10-upgrade-grub2-commonhuawei-euleros-2_0_sp10-upgrade-grub2-efi-aa64huawei-euleros-2_0_sp10-upgrade-grub2-efi-aa64-moduleshuawei-euleros-2_0_sp10-upgrade-grub2-toolshuawei-euleros-2_0_sp10-upgrade-grub2-tools-extrahuawei-euleros-2_0_sp10-upgrade-grub2-tools-minimal
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