grub2: modules built in on EFI builds that allow loading arbitrary code, circumventing secure boot

It was discovered that grub2 builds for EFI systems contained modules that were not suitable to be loaded in a Secure Boot environment. An attacker could use this flaw to circumvent the Secure Boot mechanisms and load non-verified code. Attacks could use the boot menu if no password was set, or t...

PT-2015-7636

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to the fixed version Description The issue allows local users to bypass intended securelevel/secureboot restrictions. This is achieved by leveraging improper handling of the secure boot flag across kexec reboot when...

BIOS implementations permit unsafe SMM function calls to memory locations outside of SMRAM

Overview Multiple BIOS implementations permit unsafe System Management Mode SMM function calls to memory locations outside of SMRAM. Description Multiple BIOS implementations permit unsafe System Management Mode SMM function calls to memory locations outside of SMRAM. According to Corey Kallenber...

Multiple Product UEFI System Local Security Bypass Vulnerabilities

UEFI is a standard that details a type of interface. This interface is used to automatically load the operating system from a pre-booted operating environment onto an operating system. A local security bypass vulnerability exists in multiple product UEFI systems where a boot script is used to...