High [CVE-2023-4692] out-of-bounds write at fs/ntfs.c may lead to unsigned code execution
This high-severity Red Hat Linux advisory covers CVE-2023-4692 affecting Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 7.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
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Summary
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.
This vulnerability is considered as 'Low' severity by Red Hat as the NTFS module is not shipped as part of Red Hat's signed grub2 image. Weakness: CWE-122.
Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7. Red Hat fixing advisory: RHSA-2024:3184, RHSA-2024:2456.
Affected products named by the advisory: Red Hat package: grub2.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 19 days ago·verify at source
- grub2-1:2.02-156.el8
- grub2-1:2.06-77.el9
- RHSA-2024:3184
- RHSA-2024:2456
Official advisory · high-confidence parse· fetched 19 days ago·verify at source
Mitigation
Upgrade to a fixed release: grub2-1:2.02-156.el8, grub2-1:2.06-77.el9, RHSA-2024:3184, RHSA-2024:2456. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 19 days ago·verify at source
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