Buffer Overflow Affecting grub2-efi-x64-cdboot package, versions <1:2.02-123.el8_6.8


Severity

Recommended
0.0
high
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.07% (31st percentile)

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  • Snyk IDSNYK-CENTOS8-GRUB2EFIX64CDBOOT-2931303
  • published9 Jun 2022
  • disclosed7 Jun 2022

Introduced: 7 Jun 2022

CVE-2022-28737  (opens in a new tab)
CWE-120  (opens in a new tab)

How to fix?

Upgrade Centos:8 grub2-efi-x64-cdboot to version 1:2.02-123.el8_6.8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2-efi-x64-cdboot package and not the grub2-efi-x64-cdboot package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables; The handle_image() function takes into account the SizeOfRawData field from each section to be loaded. An attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not discarded in such scenario.

CVSS Scores

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