vulnerability

Amazon Linux AMI 2: CVE-2023-40547: Security patch for shim (ALAS-2024-2484)

Severity
8
CVSS
(AV:A/AC:M/Au:N/C:C/I:C/A:C)
Published
Jan 25, 2024
Added
Mar 5, 2024
Modified
Jan 28, 2025

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)

amazon-linux-ami-2-upgrade-shim-unsigned-aa64amazon-linux-ami-2-upgrade-shim-unsigned-aa64-debuginfoamazon-linux-ami-2-upgrade-shim-unsigned-x64amazon-linux-ami-2-upgrade-shim-unsigned-x64-debuginfo
Title
NEW

Explore Exposure Command

Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.