Use After Free Affecting grub2-i386-pc package, versions <2.04-150300.22.20.2


0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.04% (9th percentile)
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NVD
7.8 high
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SUSE
8.4 high
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Red Hat
7 high

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  • Snyk ID SNYK-SLES153-GRUB2I386PC-2869614
  • published 14 Jun 2022
  • disclosed 13 Jun 2022

How to fix?

Upgrade SLES:15.3 grub2-i386-pc to version 2.04-150300.22.20.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2-i386-pc package and not the grub2-i386-pc package as distributed by SLES. See How to fix? for SLES:15.3 relevant fixed versions and status.

There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2's memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved.