CVE-2023-49721

Summary

An insecure default to allow UEFI Shell in EDK2 was left enabled in LXD. This allows an OS-resident attacker to bypass Secure Boot.

Affected Software

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

• https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139
• https://nvd.nist.gov/vuln/detail/CVE-2023-48733
• https://www.openwall.com/lists/oss-security/2024/02/14/4
• https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137

CISA ADP Vulnrichment

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

References

• https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139
• https://nvd.nist.gov/vuln/detail/CVE-2023-48733
• https://www.openwall.com/lists/oss-security/2024/02/14/4
• https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137

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