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Red Hat: CVE-2020-15706: CVE-2020-15706 grub2: Use-after-free redefining a function whilst the same function is already executing (Multiple Advisories)

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Red Hat: CVE-2020-15706: CVE-2020-15706 grub2: Use-after-free redefining a function whilst the same function is already executing (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
07/29/2020
Created
07/31/2020
Added
07/30/2020
Modified
12/15/2023

Description

GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.

Solution(s)

  • redhat-upgrade-fwupd
  • redhat-upgrade-fwupd-debuginfo
  • redhat-upgrade-fwupd-debugsource
  • redhat-upgrade-fwupdate
  • redhat-upgrade-fwupdate-debuginfo
  • redhat-upgrade-fwupdate-devel
  • redhat-upgrade-fwupdate-efi
  • redhat-upgrade-fwupdate-libs
  • redhat-upgrade-grub2
  • redhat-upgrade-grub2-common
  • redhat-upgrade-grub2-debuginfo
  • redhat-upgrade-grub2-debugsource
  • redhat-upgrade-grub2-efi-aa64-modules
  • redhat-upgrade-grub2-efi-ia32
  • redhat-upgrade-grub2-efi-ia32-cdboot
  • redhat-upgrade-grub2-efi-ia32-modules
  • redhat-upgrade-grub2-efi-x64
  • redhat-upgrade-grub2-efi-x64-cdboot
  • redhat-upgrade-grub2-efi-x64-modules
  • redhat-upgrade-grub2-pc
  • redhat-upgrade-grub2-pc-modules
  • redhat-upgrade-grub2-ppc-modules
  • redhat-upgrade-grub2-ppc64-modules
  • redhat-upgrade-grub2-ppc64le-modules
  • redhat-upgrade-grub2-tools
  • redhat-upgrade-grub2-tools-debuginfo
  • redhat-upgrade-grub2-tools-efi
  • redhat-upgrade-grub2-tools-efi-debuginfo
  • redhat-upgrade-grub2-tools-extra
  • redhat-upgrade-grub2-tools-extra-debuginfo
  • redhat-upgrade-grub2-tools-minimal
  • redhat-upgrade-grub2-tools-minimal-debuginfo
  • redhat-upgrade-mokutil
  • redhat-upgrade-mokutil-debuginfo
  • redhat-upgrade-shim-ia32
  • redhat-upgrade-shim-unsigned-aa64-debuginfo
  • redhat-upgrade-shim-unsigned-ia32
  • redhat-upgrade-shim-unsigned-ia32-debuginfo
  • redhat-upgrade-shim-unsigned-x64
  • redhat-upgrade-shim-unsigned-x64-debuginfo
  • redhat-upgrade-shim-x64

References

  • DSA-4735
  • CVE-2020-15706
  • RHSA-2020:3216
  • RHSA-2020:3217
  • RHSA-2020:3223
  • RHSA-2020:3271
  • RHSA-2020:3274
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