CVE-2023-4001
Grub2: bypass the grub password protection feature
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Red Hat Enterprise Linux 9 Red Hat grub2
https://access.redhat.com/downloads/content/package-browser/ |
≥ 1:2.06-70.el9_3.2; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.0 Extended Update Support Red Hat grub2
https://access.redhat.com/downloads/content/package-browser/ |
≥ 1:2.06-27.el9_0.16; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.2 Extended Update Support Red Hat grub2
https://access.redhat.com/downloads/content/package-browser/ |
≥ 1:2.06-61.el9_2.2; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8 Red Hat grub2
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 6.8 medium |
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CNA: redhat |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://access.redhat.com/errata/RHSA-2024:0437CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2024:0456CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2024:0468CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2023-4001CNA: redhat · vdb-entry, x_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2224951CNA: redhat · issue-tracking, x_refsource_REDHAT
- https://dfir.ru/2024/01/15/cve-2023-4001-a-vulnerability-in-the-downstream-grub-boot-manager/CNA: redhat
- http://www.openwall.com/lists/oss-security/2024/01/15/3ADP: CVE · x_transferred
- https://access.redhat.com/errata/RHSA-2024:0437ADP: CVE · vendor-advisory, x_refsource_REDHAT, x_transferred
- https://access.redhat.com/errata/RHSA-2024:0456ADP: CVE · vendor-advisory, x_refsource_REDHAT, x_transferred
- https://access.redhat.com/errata/RHSA-2024:0468ADP: CVE · vendor-advisory, x_refsource_REDHAT, x_transferred
- https://access.redhat.com/security/cve/CVE-2023-4001ADP: CVE · vdb-entry, x_refsource_REDHAT, x_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=2224951ADP: CVE · issue-tracking, x_refsource_REDHAT, x_transferred
- https://dfir.ru/2024/01/15/cve-2023-4001-a-vulnerability-in-the-downstream-grub-boot-manager/ADP: CVE · x_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/3OBADMKHQLJOBA32Q7XPNSYMVHVAFDCB/ADP: CVE · x_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/CHLZQ47HM64NDOHMHYO7VIJFYD5ZPPYN/ADP: CVE · x_transferred
- https://security.netapp.com/advisory/ntap-20240216-0006/ADP: CVE · x_transferred
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