GNU GRUB (aka GRUB2) through 2.12 does not use a constant-time algorithm for grub_crypto_memcmp and thus allows side-channel attacks. — CVE-2024-56738
Date
Source
MSRC
MSRC
Vendor
Microsoft
Microsoft
Threat
medium
medium
CVSS
6.7
6.7
Summary
Advisory CVE-2024-56738. GNU GRUB (aka GRUB2) through 2.12 does not use a constant-time algorithm for grub_crypto_memcmp and thus allows side-channel attacks. Vendor: Microsoft. Source: MSRC. Threat: medium. CVSS 6.7. See the official…
What to do
General, cautious steps (verify details in the official source):
- Review exposure and plan remediation based on risk and environment.
- Identify affected product versions in your inventory and verify whether you are impacted.
- Apply vendor patches/updates or recommended mitigations as soon as available.
- Read the official advisory for exact affected versions and remediation steps.