Gentoo Linux Security Advisory 202104-5 - Multiple vulnerabilities have been found in GRUB, the worst might allow for circumvention of UEFI Secure Boot. Versions less than 2.06_rc1 are affected.
299d3aa5f1947d880973d356a72e943ce929b133f553e466d411763947ccd7a7Ubuntu Security Notice 4432-2 - USN-4432-1 fixed vulnerabilities in GRUB2 affecting Secure Boot environments. Unfortunately, the update introduced regressions for some BIOS systems , preventing them from successfully booting. This update addresses the issue. Users with BIOS systems that installed GRUB2 versions from USN-4432-1 should verify that their GRUB2 installation has a correct understanding of their boot device location and installed the boot loader correctly. Various other issues were also addressed.
0724dbcf0130cfe1e7185b866f7f79202a090407d4509716ab0a310cc9031e47Red Hat Security Advisory 2020-3274-01 - The grub2 packages provide version 2 of the Grand Unified Boot Loader, a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices. The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments. The fwupdate packages provide a service that allows session software to update device firmware. Issues addressed include buffer overflow, code execution, integer overflow, and use-after-free vulnerabilities.
144bbd79ffcbfffe93acfa603f4d913fb593155ea1a5321f40f37fb8fa61f025Red Hat Security Advisory 2020-3276-01 - The grub2 packages provide version 2 of the Grand Unified Boot Loader, a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices. The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments. Issues addressed include buffer overflow, code execution, integer overflow, and use-after-free vulnerabilities.
197b0d3e9e5eb14812b23bed10cf9474e30c65c53e0f2ec81dcbce0b0cb9d863Red Hat Security Advisory 2020-3271-01 - The grub2 packages provide version 2 of the Grand Unified Boot Loader, a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices. The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments. The fwupdate packages provide a service that allows session software to update device firmware. Issues addressed include buffer overflow, code execution, integer overflow, and use-after-free vulnerabilities.
b3bf571485b358a2434b6042dc22556c9f139dd122fad7da04702eb958284484Red Hat Security Advisory 2020-3275-01 - The grub2 packages provide version 2 of the Grand Unified Boot Loader, a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices. The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments. The fwupdate packages provide a service that allows session software to update device firmware. Issues addressed include buffer overflow, code execution, integer overflow, and use-after-free vulnerabilities.
2b41ed000071cbda794590471814d6e108611955697108378e26aaa6a96b2291Red Hat Security Advisory 2020-3273-01 - The grub2 packages provide version 2 of the Grand Unified Boot Loader, a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices. The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments. Issues addressed include buffer overflow, code execution, integer overflow, and use-after-free vulnerabilities.
47bfe35d5b45522fcb69078dabbdb6694c53947ba83cbdb8ecfe62cbd0a4c145Red Hat Security Advisory 2020-3227-01 - The grub2 packages provide version 2 of the Grand Unified Boot Loader, a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices. The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments. The fwupd packages provide a service that allows session software to update device firmware. Issues addressed include buffer overflow, code execution, integer overflow, and use-after-free vulnerabilities.
02bb599d5c930a28ff39fd83bd07305a20029bdd880ba0f33e78536686a873b6Red Hat Security Advisory 2020-3223-01 - The grub2 packages provide version 2 of the Grand Unified Boot Loader, a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices. The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments. The fwupd packages provide a service that allows session software to update device firmware. Issues addressed include buffer overflow, code execution, integer overflow, and use-after-free vulnerabilities.
853c8e6c7fd90e574532c678b43f0666aa050b001aa9278f07ba2f218a87698fRed Hat Security Advisory 2020-3217-01 - The grub2 packages provide version 2 of the Grand Unified Boot Loader, a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices. The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments. The fwupdate packages provide a service that allows session software to update device firmware. Issues addressed include buffer overflow, code execution, integer overflow, and use-after-free vulnerabilities.
05b381f567de5c663580937c24b12d2dc62a25e2d9855d3b4aef8f9ed69b2f13Ubuntu Security Notice 4432-1 - Jesse Michael and Mickey Shkatov discovered that the configuration parser in GRUB2 did not properly exit when errors were discovered, resulting in heap-based buffer overflows. A local attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. Chris Coulson discovered that the GRUB2 function handling code did not properly handle a function being redefined, leading to a use-after-free vulnerability. A local attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. Various other issues were also addressed.
0c2f4e760d316daa33896d841ba13f6fdee44676870003aaa34fa0d83a8f70afRed Hat Security Advisory 2020-3216-01 - The grub2 packages provide version 2 of the Grand Unified Boot Loader, a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices. The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments. The fwupd packages provide a service that allows session software to update device firmware. Issues addressed include buffer overflow, code execution, integer overflow, and use-after-free vulnerabilities.
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