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Alma Linux: CVE-2020-25647: Moderate: shim security update (ALSA-2021-1734)

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Alma Linux: CVE-2020-25647: Moderate: shim security update (ALSA-2021-1734)

Severity
7
CVSS
(AV:L/AC:L/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. During USB device initialization, descriptors are read with very little bounds checking and assumes the USB device is providing sane values. If properly exploited, an attacker could trigger memory corruption leading to arbitrary code execution allowing a bypass of the Secure Boot mechanism. 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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