CVE-2023-4001
An authentication bypass flaw was found in GRUB due to the way that GRUB uses the UUID of a device to search for the configuration file that contains the password hash for the GRUB password protection feature.
Does this matter?
Lower severity and a low EPSS score (0.54%). Track it; it rarely justifies an emergency change on its own.
Description
An authentication bypass flaw was found in GRUB due to the way that GRUB uses the UUID of a device to search for the configuration file that contains the password hash for the GRUB password protection feature. An attacker capable of attaching an external drive such as a USB stick containing a file system with a duplicate UUID (the same as in the "/boot/" file system) can bypass the GRUB password protection feature on UEFI systems, which enumerate removable drives before non-removable ones. This issue was introduced in a downstream patch in Red Hat's version of grub2 and does not affect the upstream package.
- CVSS 3.1
- 6.8 MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.54% probability · 44th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-290
- Affected
- gnu/grub2 · redhat/enterprise linux · fedoraproject/fedora
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2024:0437
- https://access.redhat.com/errata/RHSA-2024:0456
- https://access.redhat.com/errata/RHSA-2024:0468
- https://access.redhat.com/security/cve/CVE-2023-4001Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2224951Issue Tracking, Vendor Advisory
- https://dfir.ru/2024/01/15/cve-2023-4001-a-vulnerability-in-the-downstream-grub-boot-manager/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2024/01/15/3
- https://access.redhat.com/errata/RHSA-2024:0437
- https://access.redhat.com/errata/RHSA-2024:0456
- https://access.redhat.com/errata/RHSA-2024:0468
- https://access.redhat.com/security/cve/CVE-2023-4001Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2224951Issue Tracking, Vendor Advisory
- https://dfir.ru/2024/01/15/cve-2023-4001-a-vulnerability-in-the-downstream-grub-boot-manager/Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3OBADMKHQLJOBA32Q7XPNSYMVHVAFDCB/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CHLZQ47HM64NDOHMHYO7VIJFYD5ZPPYN/
- https://security.netapp.com/advisory/ntap-20240216-0006/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.