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Alma Linux: CVE-2023-40547: Important: shim bug fix update (ALSA-2024-1903)

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Alma Linux: CVE-2023-40547: Important: shim bug fix update (ALSA-2024-1903)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
01/25/2024
Created
05/13/2024
Added
05/13/2024
Modified
05/22/2024

Description

A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability successfully.

Solution(s)

  • alma-upgrade-shim-aa64
  • alma-upgrade-shim-x64

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