CVE-2024-45780

Grub2: fs/tar: integer overflow causes heap oob write

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.

Remediation

Workaround:

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

Category

6.7
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Third-Party Advisory redhat.com
Affected: Red Hat Red Hat Enterprise Linux 10
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat OpenShift Container Platform 4
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/security/cve/CVE-2024-45780 third party advisory vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2345856 issue tracking
https://lists.gnu.org/archive/html/grub-devel/2025-02/msg00024.html mailing list

Frequently Asked Questions

What is the severity of CVE-2024-45780?
CVE-2024-45780 has been scored as a medium severity vulnerability.
How to fix CVE-2024-45780?
As a workaround for remediating CVE-2024-45780: Do not run grub2 in an untrusted environment, specifically with a tar file system image.
Is CVE-2024-45780 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-45780 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-45780?
CVE-2024-45780 affects Red Hat Red Hat Enterprise Linux 10, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat OpenShift Container Platform 4.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.