Out-of-bounds Write Affecting grub2-powerpc-ieee1275 package, versions <2.04-150200.9.68.1


0.0
medium

Snyk CVSS

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

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  • Snyk ID SNYK-SLES152-GRUB2POWERPCIEEE1275-3148221
  • published 26 Nov 2022
  • disclosed 25 Nov 2022

How to fix?

Upgrade SLES:15.2 grub2-powerpc-ieee1275 to version 2.04-150200.9.68.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2-powerpc-ieee1275 package and not the grub2-powerpc-ieee1275 package as distributed by SLES:15.2. See How to fix? for SLES:15.2 relevant fixed versions and status.

When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.