CVE-2023-40547

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.

Affected packages (1)

• Debian/shimfrom 0, < 15.8-1~deb11u1

CVSS scores

References (1)

• ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2023-40547