CVE-2023-4001

Summary

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.

Affected Software

VendorProductVersion RangeStatus
Red HatRed Hat Enterprise Linux 91:2.06-70.el9_3.2 < *unaffected
Red HatRed Hat Enterprise Linux 9.0 Extended Update Support1:2.06-27.el9_0.16 < *unaffected
Red HatRed Hat Enterprise Linux 9.2 Extended Update Support1:2.06-61.el9_2.2 < *unaffected

Weaknesses

  • CWE-290: Authentication Bypass by Spoofing

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References