CVE-2014-3603 in Identity Provider
Summary
by MITRE
The (1) HttpResource and (2) FileBackedHttpResource implementations in Shibboleth Identity Provider (IdP) before 2.4.1 and OpenSAML Java 2.6.2 do not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.
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Analysis
by VulDB Data Team • 12/16/2024
The vulnerability described in CVE-2014-3603 represents a critical SSL/TLS certificate validation flaw affecting Shibboleth Identity Provider versions prior to 2.4.1 and OpenSAML Java library versions before 2.6.2. This issue stems from insufficient hostname verification during SSL/TLS handshake processes, creating a significant security gap that undermines the fundamental purpose of certificate-based authentication. The vulnerability specifically impacts the HttpResource and FileBackedHttpResource implementations, which are core components responsible for handling HTTP communications and resource management within the Shibboleth identity federation framework. These components are widely deployed in enterprise environments for single sign-on (SSO) and identity management solutions, making the vulnerability particularly dangerous as it affects systems that authenticate and authorize users across multiple applications and services.
The technical flaw manifests in the absence of proper hostname validation against X.509 certificate fields during SSL/TLS connections. When establishing secure communications, the affected implementations fail to verify that the server certificate's Common Name (CN) field or Subject Alternative Name (SAN) extension contains a domain name that matches the hostname being connected to. This omission allows attackers to perform man-in-the-middle attacks by presenting any valid SSL certificate, regardless of whether it was issued for the target server. The vulnerability directly relates to CWE-295, which describes "Improper Certificate Validation," and specifically addresses the lack of hostname verification in certificate validation processes. According to the ATT&CK framework, this vulnerability maps to technique T1552.001, "Unsecured Credentials," as it enables attackers to bypass authentication mechanisms through certificate spoofing, and T1046, "Network Service Scanning," as it facilitates the exploitation of SSL/TLS connections without proper authentication.
The operational impact of this vulnerability extends far beyond simple communication issues, as it fundamentally compromises the security posture of systems relying on Shibboleth for identity management. Attackers can exploit this weakness to intercept and manipulate sensitive authentication data, potentially gaining unauthorized access to protected applications and services within the federation. The vulnerability affects organizations that depend on Shibboleth for SSO implementations, particularly those in government, financial services, and healthcare sectors where identity verification and data protection are paramount. The consequences include potential data breaches, unauthorized access to sensitive systems, and the compromise of user credentials that flow through the Shibboleth infrastructure. Organizations using these vulnerable versions may experience unauthorized access to their identity federation services, leading to potential regulatory violations and significant reputational damage. The vulnerability also impacts the integrity of the authentication process, as it allows attackers to impersonate legitimate servers and potentially redirect users to malicious endpoints while maintaining the appearance of secure communication.
Mitigation strategies for CVE-2014-3603 primarily involve upgrading to patched versions of both the Shibboleth Identity Provider and OpenSAML Java libraries, with the specific recommended versions being Shibboleth IdP 2.4.1 and OpenSAML Java 2.6.2 or later. Organizations should conduct comprehensive inventory assessments to identify all systems running vulnerable versions and prioritize immediate upgrades to prevent exploitation. Additional protective measures include implementing network-level controls such as firewall rules that restrict access to identity federation endpoints, deploying intrusion detection systems to monitor for suspicious SSL/TLS connection patterns, and conducting regular security assessments of authentication infrastructure. Security teams should also consider implementing certificate pinning mechanisms where possible, though this approach requires careful consideration of maintenance overhead and potential service disruption. Organizations should review their certificate management practices and ensure that all SSL/TLS certificates are properly validated against hostname requirements, following best practices outlined in RFC 6125 for certificate verification. The vulnerability serves as a reminder of the critical importance of proper certificate validation in secure communications and highlights the need for continuous security monitoring and timely patch management across all components of identity and access management systems.