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Red Hat: CVE-2023-40547: shim: RCE in http boot support may lead to Secure Boot bypass (Multiple Advisories)

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Red Hat: CVE-2023-40547: shim: RCE in http boot support may lead to Secure Boot bypass (Multiple Advisories)

Severity
7
CVSS
(AV:A/AC:H/Au:N/C:C/I:C/A:C)
Published
01/25/2024
Created
04/17/2024
Added
04/17/2024
Modified
04/30/2024

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)

  • redhat-upgrade-mokutil
  • redhat-upgrade-mokutil-debuginfo
  • redhat-upgrade-shim-ia32
  • redhat-upgrade-shim-unsigned-ia32
  • redhat-upgrade-shim-unsigned-x64
  • redhat-upgrade-shim-x64

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