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Heap-based Buffer Overflow Affecting grub2-x86_64-efi package, versions <2.04-9.7.1

0.0
medium

Snyk CVSS

    Attack Complexity High
    Privileges Required High
    Integrity High
    Availability High
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NVD
6 medium
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SUSE
5.7 medium
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Red Hat
5.7 medium

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  • Snyk ID SNYK-SLES152-GRUB2X8664EFI-2707132
  • published 14 Apr 2022
  • disclosed 29 Jul 2020
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Introduced: 29 Jul 2020

CVE-2020-14311 Open this link in a new tab
CWE-122 Open this link in a new tab
CWE-190 Open this link in a new tab

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 is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow.