Buffer Overflow Affecting grub2-powerpc-ieee1275 package, versions <2.04-9.7.1


0.0
high

Snyk CVSS

    Attack Complexity Low
    Privileges Required High
    Scope Changed
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.07% (29th percentile)
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NVD
8.2 high
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SUSE
8.2 high
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Red Hat
8.2 high

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  • Snyk ID SNYK-SLES152-GRUB2POWERPCIEEE1275-2705463
  • published 14 Apr 2022
  • disclosed 29 Jul 2020

How to fix?

Upgrade SLES:15.2 grub2-powerpc-ieee1275 to version 2.04-9.7.1 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. See How to fix? for SLES:15.2 relevant fixed versions and status.

A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to load an untrusted or modified kernel, an attacker would first need to establish access to the system such as gaining physical access, obtain the ability to alter a pxe-boot network, or have remote access to a networked system with root access. With this access, an attacker could then craft a string to cause a buffer overflow by injecting a malicious payload that leads to arbitrary code execution within GRUB. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

References