CVE-2013-3185 in Windows
Summary
by MITRE
Microsoft Active Directory Federation Services (AD FS) 1.x through 2.1 on Windows Server 2003 R2 SP2, Windows Server 2008 SP2 and R2 SP1, and Windows Server 2012 allows remote attackers to obtain sensitive information about the service account, and possibly conduct account-lockout attacks, by connecting to an endpoint, aka "AD FS Information Disclosure Vulnerability."
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Analysis
by VulDB Data Team • 12/26/2024
The CVE-2013-3185 vulnerability represents a critical information disclosure weakness in Microsoft Active Directory Federation Services versions 1.x through 2.1 across multiple Windows Server platforms including Windows Server 2003 R2 SP2, Windows Server 2008 SP2 and R2 SP1, and Windows Server 2012. This vulnerability operates at the authentication and authorization layer of federated identity systems, where the service account credentials and operational details become accessible to unauthorized remote attackers. The flaw specifically manifests when adversaries connect to designated endpoints within the AD FS infrastructure, exploiting a design weakness that exposes sensitive service account information. This vulnerability falls under the CWE-200 category of Information Exposure and aligns with ATT&CK technique T1087.001 for Account Discovery, as it provides adversaries with critical information about service accounts that can be leveraged for further compromise. The exposure of service account details creates a pathway for attackers to understand the authentication mechanisms and potentially identify targets for account-lockout attacks.
The technical implementation of this vulnerability stems from insufficient input validation and access control mechanisms within the AD FS endpoint handling processes. When remote connections are established to specific service endpoints, the system fails to properly authenticate or authorize the connection attempts before revealing service account information. This misconfiguration allows attackers to perform reconnaissance activities without proper credentials, effectively bypassing normal security controls that should restrict access to sensitive operational details. The vulnerability operates at the protocol level where authentication requests are processed, and the system's response to these requests inadvertently includes service account metadata. This flaw demonstrates poor separation of concerns in the security architecture where operational information should remain isolated from external access points. The vulnerability is particularly concerning because it affects multiple server versions and operating systems, indicating a widespread architectural weakness rather than a localized issue.
The operational impact of CVE-2013-3185 extends beyond simple information disclosure to create significant security risks for organizations relying on AD FS for federated identity management. Attackers who successfully exploit this vulnerability can gather intelligence about service account configurations, which may include account names, authentication methods, and operational patterns that can be used to plan more sophisticated attacks. The potential for account-lockout attacks represents a particularly dangerous consequence, as adversaries can systematically target service accounts to disrupt legitimate authentication processes and create denial-of-service conditions. Organizations may experience cascading failures in their identity federation systems, with compromised service accounts potentially leading to broader access violations within the enterprise network. The vulnerability also enables attackers to map the authentication infrastructure and identify additional targets for credential harvesting or privilege escalation attacks. This information can be particularly valuable in advanced persistent threat scenarios where attackers seek to maintain long-term access to critical systems.
Mitigation strategies for CVE-2013-3185 should focus on implementing proper access controls and network segmentation around AD FS endpoints. Organizations should ensure that AD FS services are properly isolated within their network infrastructure and that unnecessary endpoints are disabled or restricted. The implementation of network access control lists and firewall rules can help prevent unauthorized connections to sensitive service ports. Microsoft recommends applying the appropriate security updates and patches that address this specific vulnerability, as the fix involves strengthening authentication mechanisms and improving endpoint access controls. Security monitoring should be enhanced to detect unusual connection patterns to AD FS endpoints, particularly those attempting to gather service account information. Additionally, organizations should implement regular security assessments of their federated identity systems to identify similar vulnerabilities in other components of their authentication infrastructure. The mitigation approach should align with NIST SP 800-53 security controls, specifically focusing on access control and system and information integrity measures. Regular account monitoring and implementing account lockout policies can help detect and prevent abuse of this vulnerability, while also reducing the risk of successful account-lockout attacks that could disrupt legitimate business operations.