CVE-2008-2246 in Windows
Summary
by MITRE
Microsoft Windows Vista through SP1 and Server 2008 do not properly import the default IPsec policy from a Windows Server 2003 domain to a Windows Server 2008 domain, which prevents IPsec rules from being enforced and allows remote attackers to bypass intended access restrictions.
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Analysis
by VulDB Data Team • 05/31/2025
This vulnerability exists in Microsoft Windows Vista through Service Pack 1 and Windows Server 2008 systems when transitioning from Windows Server 2003 domains to Windows Server 2008 domains. The core issue lies in the improper handling of IPsec policy imports during domain migration processes, creating a critical security gap that undermines network access controls. The flaw stems from the failure of Windows Server 2008 to correctly interpret and apply the default IPsec policies that were established in Windows Server 2003 environments, resulting in a complete breakdown of IPsec enforcement mechanisms.
The technical implementation of this vulnerability involves the Windows IPsec policy management system failing to properly translate or migrate IPsec policy configurations from legacy domain controllers to newer domain controllers. When a Windows Vista or Server 2008 system joins a Windows Server 2008 domain that was previously managed by a Windows Server 2003 domain controller, the system does not inherit the appropriate IPsec security policies that would normally enforce network access restrictions. This creates a scenario where IPsec rules that should prevent unauthorized network access are effectively disabled, allowing attackers to bypass intended security controls.
From an operational perspective, this vulnerability presents a significant risk to organizations migrating their domain infrastructure from Windows Server 2003 to Windows Server 2008. Attackers can exploit this weakness to gain unauthorized access to network resources that should be protected by IPsec policies, potentially leading to lateral movement within networks, data exfiltration, or privilege escalation attacks. The vulnerability specifically impacts the integrity of network security policies and undermines the trust model that IPsec is designed to establish between network entities.
The impact of this vulnerability aligns with CWE-284 Access Control Issues, where improper access control mechanisms allow unauthorized users to bypass security restrictions. This weakness directly relates to the ATT&CK technique T1071.004 Application Layer Protocol: DNS, as attackers could potentially leverage the bypassed IPsec controls to establish covert communication channels or exfiltrate data through DNS tunneling. Organizations experiencing this vulnerability may see a complete breakdown in their network access control policies, potentially allowing attackers to establish persistent access to network resources without proper authentication or authorization.
Mitigation strategies for this vulnerability require careful planning during domain migration processes and involve several key approaches. Administrators should implement manual IPsec policy configuration on Windows Vista and Server 2008 systems to ensure proper enforcement of security policies. The recommended approach includes creating explicit IPsec policies that mirror the intended security controls from the legacy Windows Server 2003 environment, rather than relying on automatic policy imports. Additionally, organizations should conduct thorough testing of IPsec policies before and after domain migration to verify that security controls remain effective.
Organizations should also consider implementing alternative access control mechanisms to compensate for the IPsec policy gaps during the transition period. This includes strengthening authentication controls, implementing network segmentation, and deploying additional monitoring solutions to detect unauthorized access attempts. Regular security assessments should be conducted to verify that IPsec policies are functioning correctly and that network access controls remain intact. The vulnerability demonstrates the importance of thorough testing during infrastructure migrations and highlights the need for comprehensive security policy management during system transitions. Organizations should also review their domain controller configurations and ensure that proper IPsec policy replication occurs between domain controllers to maintain consistent security enforcement across the network infrastructure.