GNU grub2 hfs fs/hfs.c strcpy out-of-bounds write

Summaryinfo

A vulnerability labeled as critical has been found in GNU grub2. Impacted is the function strcpy of the file fs/hfs.c of the component hfs. Such manipulation leads to out-of-bounds write. This vulnerability is referenced as CVE-2024-45782. The attack can only be performed from a local environment. No exploit is available.

Detailsinfo

A vulnerability was found in GNU grub2 (the affected version unknown). It has been rated as critical. Affected by this issue is the function strcpy of the file fs/hfs.c of the component hfs. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A flaw was found in the HFS filesystem. When reading an HFS volume's name at grub_fs_mount(), the HFS filesystem driver performs a strcpy() using the user-provided volume name as input without properly validating the volume name's length. This issue may read to a heap-based out-of-bounds writer, impacting grub's sensitive data integrity and eventually leading to a secure boot protection bypass.

The advisory is shared for download at bugzilla.redhat.com. This vulnerability is handled as CVE-2024-45782 since 09/08/2024. The exploitation is known to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/18/2025).

The vulnerability scanner Nessus provides a plugin with the ID 216508 (SUSE SLES15 Security Update : grub2 (SUSE-SU-2025:0588-1)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (216508), EUVD (EUVD-2025-5580) and CERT Bund (WID-SEC-2025-0396). Once again VulDB remains the best source for vulnerability data.

Affected

• Amazon Linux 2
• Red Hat Enterprise Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• NetApp ActiveIQ Unified Manager
• Dell NetWorker
• Dell Avamar
• Open Source Grub
• Red Hat OpenShift
• IBM QRadar SIEM

Productinfo

Vendor

• GNU

Name

• grub2

License

• open-source

Website

• Vendor: https://www.gnu.org/

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Once again VulDB remains the best source for vulnerability data.

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