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CVE-2023-4692

Public on 2023-10-06
Modified on 2024-02-01
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.

Severity
Low
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CVSS v3 Base Score
2.5
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core grub2 2023-10-12 15:08 ALAS2-2023-2292
Amazon Linux 2023 grub2 2023-10-30 23:44 ALAS2023-2023-409
Amazon Linux 2023 grub2 2023-10-30 23:44 ALAS2023-2023-408

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 2.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:N
NVD CVSSv3 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

References

Red Hat: CVE-2023-4692 Mitre: CVE-2023-4692 FAQs regarding Amazon Linux ALAS/CVE Severity