Description
An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- Canonical Ltd. / Ubuntu EDK II0 – 2023.05-2ubuntu0.1
References
- MISChttps://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137
- CONFIRMhttps://nvd.nist.gov/vuln/detail/CVE-2023-48733
- MAILING_LISThttps://www.openwall.com/lists/oss-security/2024/02/14/4
- MISChttps://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139
- MAILING_LISThttps://lists.debian.org/debian-lts-announce/2024/06/msg00028.html