Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2024-43639
CVE-2024-43639:
vulnerability analysis and mitigation
Overview
CVE-2024-43639 is a critical Windows KDC Proxy Remote Code Execution Vulnerability discovered and disclosed on November 12, 2024. This vulnerability affects Windows Server products when configured as a Kerberos Key Distribution Center (KDC) Proxy Protocol server, while domain controllers are not affected. The vulnerability has been assigned a critical CVSS severity score of 9.8 (Censys).
Technical details
The vulnerability exists in the Windows Kerberos authentication protocol, specifically affecting servers configured as KDC Proxy Protocol servers. KDC Proxy encapsulates Kerberos protocol messages inside HTTPS requests, relaying Kerberos traffic between the client and the backed KDC server. The service typically operates over HTTPS with URLs structured as https:///KdcProxy. The vulnerability affects multiple Windows Server versions including Server 2012, 2016, 2019, 2022, and 2025, each with specific build number requirements (Censys).
Impact
When exploited, this vulnerability allows unauthenticated attackers to execute remote code on affected systems by sending specially crafted requests to a vulnerable system. The attacker can leverage a cryptographic protocol vulnerability in Windows Kerberos to gain unauthorized access and execute arbitrary code with potentially full system access (Censys).
Mitigation and workarounds
Microsoft has released security updates to address this vulnerability across all affected Windows Server versions. System administrators should apply the appropriate patches based on their specific Windows Server version and build number. The patches are available through Microsoft's standard update channels (Censys).
Additional resources
Source: This report was generated using AI
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