Out-of-bounds Write 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

    Threat Intelligence

    EPSS 0.04% (6th percentile)
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NVD
8.2 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-2687418
  • published 14 Apr 2022
  • disclosed 2 Mar 2021

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. 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. Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.