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CVE-2020-27779 Affecting grub2-x86_64-efi package, versions <2.04-9.34.1

0.0
high

Snyk CVSS

    Attack Complexity High
    Privileges Required High
    Scope Changed
    Confidentiality High
    Integrity High
    Availability High
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NVD
7.5 high
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SUSE
7.5 high
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Red Hat
7.5 high

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  • Snyk ID SNYK-SLES152-GRUB2X8664EFI-2687161
  • published 14 Apr 2022
  • disclosed 2 Mar 2021
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Introduced: 2 Mar 2021

CVE-2020-27779 Open this link in a new tab

How to fix?

Upgrade SLES:15.2 grub2-x86_64-efi to version 2.04-9.34.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2-x86_64-efi package and not the grub2-x86_64-efi package as distributed by SLES:15.2. See How to fix? for SLES:15.2 relevant fixed versions and status.

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.