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Out-of-bounds Write The advisory has been revoked - it doesn't affect any version of package shim-x64  (opens in a new tab)

Threat Intelligence

EPSS
0.61% (46th percentile)

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  • Snyk IDSNYK-ROCKY8-SHIMX64-3215505
  • published5 Jan 2023
  • disclosed3 Mar 2021
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Introduced: 3 Mar 2021

CVE-2021-20233  (opens in a new tab)
CWE-787  (opens in a new tab)

Amendment

The Rocky-Linux security team deemed this advisory irrelevant for Rocky-Linux:8.

NVD Description

Note: Versions mentioned in the description apply only to the upstream shim-x64 package and not the shim-x64 package as distributed by Rocky-Linux.

A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.