Grub2: out-of-bounds write at fs/ntfs.c may lead to unsigned code execution
CVE-2023-4692

7.8HIGH

Key Information:

Vendor

Red Hat
Status
grub2
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Vendor
CVE Published:
25 October 2023

What is CVE-2023-4692?

An out-of-bounds write flaw was identified in the NTFS filesystem driver of GRUB2. This vulnerability could enable an attacker to present a specially crafted NTFS filesystem image, resulting in potential corruption of GRUB's heap metadata. In certain scenarios, this may also affect the UEFI firmware heap metadata, which could lead to arbitrary code execution and a bypass of secure boot protections.

References

https://access.redhat.com/security/cve/CVE-2023-4692
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2236613
issue-trackingx_refsource_REDHAT
https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vu...

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.