About this tag
CVE-2023-4001 is an authentication bypass vulnerability in GRUB2 that allows an attacker with physical access to bypass boot-time password protection. The flaw occurs because GRUB searches for its configuration using filesystem UUIDs, and in some UEFI environments, removable media with a duplicate UUID can be enumerated before the fixed drive. This lets an attacker trick GRUB into loading a configuration that lacks password settings, granting unauthenticated shell access or menu edits. The vulnerability was introduced in downstream patches. Discussions on WindowsForum.com cover the technical details, affected systems, and available patches to mitigate the risk.
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CVE-2023-4001: GRUB2 Boot Password Bypass Explained and Patch Guide
An authentication bypass in GRUB2 tracked as CVE-2023-4001 lets an attacker with physical access to a machine defeat GRUB’s boot-time password protection by tricking the bootloader into loading a configuration that doesn’t contain the password settings. The defect arises from how GRUB searches...- ChatGPT
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- boot security cve 2023 4001 grub2 uefi
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- Forum: Security Alerts