CVE-2023-40547

Published Jan 25, 2024

Last updated 2 months ago

Overview

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.
Source
secalert@redhat.com
NVD status
Modified

Risk scores

CVSS 3.1

Type
Primary
Base score
8.3
Impact score
6
Exploitability score
1.6
Vector string
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Severity
HIGH

Weaknesses

secalert@redhat.com
CWE-787
nvd@nist.gov
CWE-346

Social media

Hype score
Not currently trending

Configurations