A flaw was found in grub2. When reading tar files, grub2 allocates an internal buffer for the file name. However, it fails to properly verify the allocation against possible integer overflows. It's possible to cause the allocation length to overflow with a crafted tar file, leading to a heap out-of-bounds write. This flaw eventually allows an attacker to circumvent secure boot protections.
Fixes

Solution

No solution given by the vendor.


Workaround

Do not run grub2 in an untrusted environment, specifically with a tar file system image.

History

Fri, 03 Oct 2025 11:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhivos
CPEs cpe:/o:redhat:rhivos:1
Vendors & Products Redhat rhivos

Sat, 05 Jul 2025 07:45:00 +0000

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:10

Wed, 05 Mar 2025 21:00:00 +0000

Type Values Removed Values Added
References

Tue, 04 Mar 2025 03:45:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Mon, 03 Mar 2025 14:30:00 +0000

Type Values Removed Values Added
Title grub2: fs/tar: Integer Overflow causes Heap OOB Write Grub2: fs/tar: integer overflow causes heap oob write
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

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

Type Values Removed Values Added
Description A flaw was found in grub2. When reading tar files, grub2 allocates an internal buffer for the file name. However, it fails to properly verify the allocation against possible integer overflows. It's possible to cause the allocation length to overflow with a crafted tar file, leading to a heap out-of-bounds write. This flaw eventually allows an attacker to circumvent secure boot protections.
Title grub2: fs/tar: Integer Overflow causes Heap OOB Write
Weaknesses CWE-190
CWE-787
References
Metrics threat_severity

None

cvssV3_1

{'score': 6.7, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Moderate


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-10-03T11:39:51.678Z

Reserved: 2024-09-08T01:57:12.948Z

Link: CVE-2024-45780

cve-icon Vulnrichment

Updated: 2025-03-03T15:07:40.419Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-03-03T15:15:14.950

Modified: 2025-03-05T21:15:19.167

Link: CVE-2024-45780

cve-icon Redhat

Severity : Moderate

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

Links: CVE-2024-45780 - Bugzilla

cve-icon OpenCVE Enrichment

No data.