CVE-2023-4001 Grub2: bypass the grub password protection feature

What is CVE-2023-4001?

CVE-2023-4001 is a medium-severity vulnerability in Fedoraproject Fedora, published on 15 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-290

Which versions are affected by CVE-2023-4001?

It affects 3 products.

Products include Fedoraproject Fedora, Gnu Grub2, Redhat Enterprise Linux.

How do I fix CVE-2023-4001?

Apply the vendor's patch.

Is CVE-2023-4001 being exploited?

There is no known exploitation of CVE-2023-4001 in the wild and no public exploit code.

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All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALSA-2024:0468, CLSA-2024-1712672279, GHSA-rr4v-xrwq-7rhx, RHSA-2024:0437, RHSA-2024:0456, RHSA-2024:0468 and 1 more.