Alma Linux: CVE-2021-3697: Important: grub2, mokutil, shim, and shim-unsigned-x64 security update (Multiple Advisories)
Description
A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.
Solution(s)
- alma-upgrade-grub2-common
- alma-upgrade-grub2-efi-aa64
- alma-upgrade-grub2-efi-aa64-cdboot
- alma-upgrade-grub2-efi-aa64-modules
- alma-upgrade-grub2-efi-x64
- alma-upgrade-grub2-efi-x64-cdboot
- alma-upgrade-grub2-efi-x64-modules
- alma-upgrade-grub2-pc
- alma-upgrade-grub2-pc-modules
- alma-upgrade-grub2-ppc64le
- alma-upgrade-grub2-ppc64le-modules
- alma-upgrade-grub2-tools
- alma-upgrade-grub2-tools-efi
- alma-upgrade-grub2-tools-extra
- alma-upgrade-grub2-tools-minimal
- alma-upgrade-shim-aa64
- alma-upgrade-shim-unsigned-x64
- alma-upgrade-shim-x64
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