A flaw was found in grub2. When performing a symlink lookup from a reiserfs filesystem, grub's reiserfs fs module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciouly 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 grub_reiserfs_read_symlink() will call grub_reiserfs_read_real() with a overflown length parameter, leading to a heap based out-of-bounds write during data reading. This flaw may be leveraged to corrupt grub's internal critical data and can result in arbitrary code execution, by-passing secure boot protections.
History

Tue, 04 Mar 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 03 Mar 2025 17:30:00 +0000

Type Values Removed Values Added
Title grub2: reiserfs: Integer overflow when handling symlinks may lead to heap based out-of-bounds write when reading data Grub2: reiserfs: integer overflow when handling symlinks may lead to heap based out-of-bounds write when reading data
First Time appeared Redhat
Redhat enterprise Linux
Redhat openshift
CPEs cpe:/a:redhat:openshift:4
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat openshift
References

Thu, 20 Feb 2025 02:45:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE. A flaw was found in grub2. When performing a symlink lookup from a reiserfs filesystem, grub's reiserfs fs module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciouly 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 grub_reiserfs_read_symlink() will call grub_reiserfs_read_real() with a overflown length parameter, leading to a heap based out-of-bounds write during data reading. This flaw may be leveraged to corrupt grub's internal critical data and can result in arbitrary code execution, by-passing secure boot protections.

Wed, 19 Feb 2025 14:00:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE.
Title grub2: reiserfs: Integer overflow when handling symlinks may lead to heap based out-of-bounds write when reading data
Weaknesses CWE-787
References
Metrics threat_severity

None

cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Moderate


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2025-03-03T17:14:07.911Z

Updated: 2025-03-04T16:14:41.428Z

Reserved: 2025-01-23T19:05:34.260Z

Link: CVE-2025-0684

cve-icon Vulnrichment

Updated: 2025-03-04T16:14:37.158Z

cve-icon NVD

Status : Received

Published: 2025-03-03T18:15:30.537

Modified: 2025-03-03T18:15:30.537

Link: CVE-2025-0684

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-02-18T18:00:00Z

Links: CVE-2025-0684 - Bugzilla