VulnerabilityModified
CVE-2023-4692
An out-of-bounds write flaw was found in grub2's NTFS filesystem driver.
HIGH 7.8EPSS 0.54%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.54%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.54% probability · 44th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-122, CWE-787
- Affected
- gnu/grub2 · redhat/enterprise linux
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2024:2456
- https://access.redhat.com/errata/RHSA-2024:3184
- https://access.redhat.com/security/cve/CVE-2023-4692Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2236613Issue Tracking, Third Party Advisory
- https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/Exploit, Third Party Advisory
- https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.htmlMailing List
- https://seclists.org/oss-sec/2023/q4/37Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2024:2456
- https://access.redhat.com/errata/RHSA-2024:3184
- https://access.redhat.com/security/cve/CVE-2023-4692Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2236613Issue Tracking, Third Party Advisory
- https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00007.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FUU42E7CPYLATXOYVYNW6YTXXULAOV6L/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OIRJ5UZRXX2KLR4IKBJEQUNGOCXMMDLY/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PERFILCHFEUGG3OAMC6W55P6DDIBZK4Q/
- https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.htmlMailing List
- https://seclists.org/oss-sec/2023/q4/37Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202311-14
- https://security.netapp.com/advisory/ntap-20231208-0002/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.