CVE-2005-1982 in Windows
Summary
by MITRE
Unknown vulnerability in the PKINIT Protocol for Microsoft Windows 2000, Windows XP, and Windows Server 2003 could allow a local user to obtain information and spoof a server via a man-in-the-middle (MITM) attack between a client and a domain controller when PKINIT smart card authentication is being used.
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Analysis
by VulDB Data Team • 06/30/2025
The vulnerability described in CVE-2005-1982 represents a critical security flaw within the PKINIT protocol implementation on Microsoft Windows operating systems including Windows 2000, Windows XP, and Windows Server 2003. This weakness specifically manifests when PKINIT smart card authentication is employed, creating a significant attack surface that adversaries can exploit to compromise the integrity of the authentication process. The PKINIT protocol serves as a crucial component in establishing secure communication channels between clients and domain controllers by leveraging public key infrastructure for authentication purposes. When smart cards are utilized for authentication, the system relies on the proper implementation of certificate validation and trust mechanisms to maintain secure connections.
The technical flaw within the PKINIT implementation stems from insufficient validation of certificate chains and potential weaknesses in the certificate trust verification process during smart card authentication scenarios. This vulnerability enables a local attacker to manipulate the certificate validation sequence, potentially allowing them to present forged certificates that appear legitimate to the authentication system. The attack mechanism operates through a man-in-the-middle position where the malicious actor can intercept and modify certificate exchanges between the client and domain controller. The vulnerability's classification as a certificate validation weakness aligns with CWE-295 which addresses improper certificate validation and certificate chain validation issues. This flaw essentially undermines the fundamental security guarantees that PKINIT should provide, allowing attackers to bypass the normal authentication controls that smart card-based systems are designed to enforce.
The operational impact of this vulnerability extends beyond simple information disclosure to encompass complete authentication bypass capabilities that could enable attackers to impersonate legitimate users or systems within the domain. A successful exploitation could allow an attacker to gain unauthorized access to domain resources, potentially escalating privileges and moving laterally within the network environment. The local user requirement for exploitation suggests that the attack vector may involve either a compromised local account or privilege escalation from a lower-privileged position. However, the implications remain severe as domain controller compromise can lead to widespread access to enterprise resources and sensitive data. This vulnerability particularly affects environments heavily reliant on smart card authentication, where the trust model between clients and domain controllers is paramount for maintaining security boundaries.
Mitigation strategies for CVE-2005-1982 should prioritize immediate implementation of Microsoft security patches and updates to address the underlying certificate validation issues in the PKINIT protocol. Organizations should consider implementing additional network monitoring to detect unusual certificate exchange patterns that might indicate MITM activity. The deployment of enhanced certificate validation mechanisms and proper certificate trust management should be prioritized alongside regular security assessments of authentication infrastructure. From an ATT&CK framework perspective, this vulnerability maps to techniques involving credential access and defense evasion, specifically targeting the authentication process through certificate manipulation. Network segmentation and additional authentication layers should be considered as compensating controls while awaiting full patch deployment. Security teams should also implement certificate monitoring solutions to detect potential certificate forgery attempts and maintain updated knowledge of the certificate authorities trusted by their systems. The vulnerability serves as a reminder of the critical importance of proper certificate validation in PKI-based authentication systems and the potential consequences when these validation mechanisms are compromised.