fkie_cve-2025-0678
Vulnerability from fkie_nvd
Published
2025-03-03 17:15
Modified
2025-03-25 05:15
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2025-0678Broken Link
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2346118Issue Tracking
Impacted products
Vendor Product Version
gnu grub2 *
redhat openshift_container_platform 4.0
redhat enterprise_linux 7.0
redhat enterprise_linux 8.0
redhat enterprise_linux 9.0


To clipboard 

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      "value": "A flaw was found in grub2. When reading data from a squash4 filesystem, grub\u0027s 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\u0027s internal critical data and may result in arbitrary code execution, by-passing secure boot protections."
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  "lastModified": "2025-03-25T05:15:40.667",
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