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Alma Linux: CVE-2020-27779: Moderate: shim security update (ALSA-2021-1734)

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Alma Linux: CVE-2020-27779: Moderate: shim security update (ALSA-2021-1734)

Severity
7
CVSS
(AV:L/AC:M/Au:N/C:C/I:C/A:C)
Published
03/03/2021
Created
05/05/2022
Added
05/04/2022
Modified
10/28/2022

Description

A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Solution(s)

  • alma-upgrade-shim-aa64
  • alma-upgrade-shim-ia32
  • alma-upgrade-shim-unsigned-aarch64
  • alma-upgrade-shim-unsigned-x64
  • alma-upgrade-shim-x64

References

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