Integer Overflow or Wraparound Affecting grub2-x86_64-efi package, versions <2.04-9.7.1



    Attack Complexity High
    Privileges Required High
    Integrity High
    Availability High
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6.7 medium
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Red Hat
6.7 medium
Expand this section
5.7 medium

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  • Snyk ID SNYK-SLES152-GRUB2X8664EFI-2706831
  • published 14 Apr 2022
  • disclosed 29 Jul 2020

How to fix?

Upgrade SLES:15.2 grub2-x86_64-efi to version 2.04-9.7.1 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.

There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data.