CVE-2006-2371 in Windows
Summary
by MITRE
Buffer overflow in the Remote Access Connection Manager service (RASMAN) service in Microsoft Windows 2000 SP4, XP SP1 and SP2, and Server 2003 SP1 and earlier allows remote unauthenticated or authenticated attackers to execute arbitrary code via certain crafted "RPC related requests," that lead to registry corruption and stack corruption, aka the "RASMAN Registry Corruption Vulnerability."
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Analysis
by VulDB Data Team • 01/20/2025
The CVE-2006-2371 vulnerability represents a critical buffer overflow flaw within the Remote Access Connection Manager service component of Microsoft Windows operating systems. This vulnerability specifically affects Windows 2000 Service Pack 4, Windows XP Service Packs 1 and 2, and Windows Server 2003 Service Pack 1 and earlier versions. The flaw resides in the RASMAN service which manages remote access connections and handles various rpc related requests that are processed through the windows rpc infrastructure. The vulnerability stems from inadequate input validation and memory management within the service's processing of remote procedure calls, creating an exploitable condition that can be triggered through malformed network requests.
The technical implementation of this vulnerability involves a classic buffer overflow scenario where crafted rpc requests containing excessive data can overwrite adjacent memory locations in the RASMAN service process. When the service processes these malformed requests, it fails to properly validate the size of incoming data before copying it into fixed-size buffers, leading to stack corruption and potential registry corruption as mentioned in the vulnerability description. The buffer overflow occurs during the processing of registry-related operations that are part of the remote access connection management functionality. This corruption can result in arbitrary code execution with the privileges of the RASMAN service, which typically runs with system-level privileges. The vulnerability is particularly dangerous because it can be exploited by unauthenticated attackers over the network, making it a remote code execution vulnerability that does not require prior access credentials.
The operational impact of this vulnerability extends beyond simple privilege escalation as it provides attackers with a pathway to gain complete system control without requiring authentication. The RASMAN service is designed to handle remote access connections and typically listens on network ports for incoming rpc requests, making it a prime target for network-based attacks. Successful exploitation can result in full system compromise, allowing attackers to install malware, modify system configurations, steal sensitive data, or establish persistent backdoors. The vulnerability affects organizations running the affected operating systems and can be exploited by automated scanning tools that identify vulnerable systems. The registry corruption aspect of the vulnerability adds additional complexity as it can potentially damage system configuration data, leading to system instability or complete system failure. This makes the vulnerability particularly attractive to attackers seeking to cause maximum disruption while maintaining persistent access.
Mitigation strategies for this vulnerability should focus on immediate patch deployment as Microsoft released security updates addressing this specific flaw in their regular security bulletins. Organizations should prioritize patching all affected systems with the appropriate service packs and security updates, particularly those running the vulnerable Windows versions mentioned in the vulnerability description. Network segmentation and firewall rules should be implemented to restrict rpc traffic to only necessary systems, reducing the attack surface. The principle of least privilege should be enforced by ensuring that the RASMAN service runs with minimal required permissions and that remote access capabilities are restricted to authorized users only. System monitoring should be enhanced to detect unusual rpc activity or registry modifications that might indicate exploitation attempts. Additionally, organizations should implement network intrusion detection systems that can identify and alert on malformed rpc requests that match the patterns associated with this vulnerability. Compliance with industry standards such as those outlined in the CWE catalog under buffer overflow categories and ATT&CK techniques related to privilege escalation and remote code execution should be maintained. Regular vulnerability assessments and penetration testing should be conducted to identify and remediate similar vulnerabilities in other system components, ensuring comprehensive security posture maintenance across the organization's IT infrastructure.