CVE-2023-40547

Updated: 2024-04-18 03:51:07.525691

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.


Links NIST CIRCL RHEL Ubuntu

Severity

Severity Score
CVSS Version 2.x 0
CVSS Version 3.x HIGH 8.3

Status

OS name Project name Version Score Severity Status Errata Last updated
CentOS 8.4 ELS shim 15-15 8.3 HIGH Released CLSA-2024:1711036007 2024-03-21 14:10:00
CentOS 8.5 ELS shim 15-15 8.3 HIGH Released CLSA-2024:1711036383 2024-03-21 14:09:59