CVE-2023-4692
grub2 - security update
7.8
HIGH
CVSS 3.1
EPSS 0.00%
Description
An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub's heap metadata corruption. In some circumstances, the attack may also corrupt the UEFI firmware heap metadata. As a result, arbitrary code execution and secure boot protection bypass may be achieved.
How to fix CVE-2023-4692
To remediate CVE-2023-4692, upgrade the affected package to a fixed version below.
- —upgrade to 2.06-3~deb11u6 or later
- —upgrade to 2.06-3~deb10u4 or later
- —upgrade to 2.06-3~deb11u6 or later
Is CVE-2023-4692 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 2.06-3~deb11u6
- from 0, < 2.06-3~deb10u4
- from 0, < 2.06-3~deb11u6
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |