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Race Condition Affecting grub2 package, versions <2.04-9.7.1

0.0
medium

Snyk CVSS

    Attack Complexity High
    Privileges Required High
    Confidentiality High
    Integrity High
    Availability High
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NVD
6.4 medium
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SUSE
6.4 medium
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Red Hat
6.4 medium

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  • Snyk ID SNYK-SLES152-GRUB2-2706065
  • published 14 Apr 2022
  • disclosed 29 Jul 2020
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Introduced: 29 Jul 2020

CVE-2020-15706 Open this link in a new tab
CWE-362 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade SLES:15.2 grub2 to version 2.04-9.7.1 or higher.

NVD Description

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

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.