CVEvulnerability

CVE-2023-40547

8.3 HIGH Published 2024-01-25 Modified 2026-06-26 Official page ↗
Status
Modified
Published
2024-01-25
Last modified
2026-06-26
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.3 HIGH — CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS 3.1 ([email protected])
8.3 HIGH — CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-346, CWE-787

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 configurations

• redhat shim (< 15.8) • redhat enterprise linux 7.0 • redhat enterprise linux 8.0 • redhat enterprise linux 9.0

Related

Weakness · CWE (2)

  • CWE-346 Origin Validation Error weakness
  • CWE-787 Out-of-bounds Write weakness

References