EDK2 vulnerabilities

EDK2 contains a vulnerability in BIOS where an attacker with local access may cause 'Improper Input Validation'. Successful exploitation could alter control flow unexpectedly, potentially allowing arbitrary command execution and impacting Confidentiality, Integrity, and Availability.

EDK2 contains a vulnerability in BIOS where an attacker may cause 'Exposure of Sensitive Information to an Unauthorized Actor' by local access. Successful exploitation may lead to information disclosure or privilege escalation and impact confidentiality.

The Ubuntu edk2 UEFI firmware packages accidentally allowed the UEFI Shell to be accessed in Secure Boot environments, possibly allowing bypass of Secure Boot constraints. Versions 2024.05-2ubuntu0.3 and 2024.02-2ubuntu0.3 disable the Shell; some previous versions inserted a secure-boot-based decision to continue running inside the Shell itself, which is believed to be sufficient to enforce Secure Boot restrictions. This is an additional repair on top of the incomplete fix for CVE-2023-48733.