CVE-2006-3252 in Privatewire Gateway
Summary
by MITRE
Buffer overflow in the Online Registration Facility for Algorithmic Research PrivateWire VPN software up to 3.7 allows remote attackers to execute arbitrary code via a long GET request.
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Analysis
by VulDB Data Team • 09/20/2017
The vulnerability identified as CVE-2006-3252 represents a critical buffer overflow flaw within the Online Registration Facility component of Algorithmic Research PrivateWire VPN software versions 3.7 and earlier. This vulnerability resides in the software's handling of HTTP GET requests during the registration process, creating a pathway for remote attackers to exploit the system. The buffer overflow occurs when the application fails to properly validate the length of incoming GET parameters, allowing an attacker to craft malicious requests that exceed the allocated buffer space. Such flaws typically arise from inadequate input validation and memory management practices within the application's network processing components, making them particularly dangerous as they can be exploited over the network without requiring local system access or authentication.
The technical implementation of this vulnerability stems from improper bounds checking within the registration facility's HTTP request parsing logic. When a GET request is received, the software attempts to store the parameter data in a fixed-size buffer without sufficient validation of the input length. This classic buffer overflow condition allows attackers to overwrite adjacent memory locations, potentially including return addresses, function pointers, or other critical program state information. The vulnerability specifically affects the registration process where user credentials and system information are submitted, making it particularly attractive to threat actors seeking to gain unauthorized access to the VPN infrastructure. According to CWE classification, this maps to CWE-121: Stack-based Buffer Overflow, which is categorized under the broader weakness type of buffer overflow vulnerabilities that can lead to arbitrary code execution.
The operational impact of CVE-2006-3252 extends beyond simple code execution capabilities, as it provides attackers with potential access to the underlying VPN infrastructure and associated systems. Remote exploitation of this vulnerability could enable attackers to execute arbitrary commands with the privileges of the affected service, potentially leading to complete system compromise. The implications are particularly severe in enterprise environments where VPN software serves as a gateway to internal networks, as successful exploitation could provide unauthorized access to sensitive corporate data, internal systems, and network resources. Attackers could leverage this vulnerability to establish persistent access, install backdoors, or conduct further reconnaissance within the compromised network. The vulnerability's remote exploitability means that attackers do not require physical access to the system, significantly increasing the attack surface and potential impact.
Mitigation strategies for CVE-2006-3252 should prioritize immediate software updates and patches from Algorithmic Research, as the vendor would have released a fixed version addressing the buffer overflow in the registration facility. Organizations should implement network segmentation to limit access to the affected VPN services and deploy intrusion detection systems to monitor for suspicious GET requests that exceed normal parameter lengths. Input validation measures should be strengthened at the network perimeter using web application firewalls and proxy servers that can filter malicious requests before they reach the vulnerable application. Security teams should also conduct thorough vulnerability assessments to identify other potentially affected systems and ensure that all instances of the PrivateWire VPN software are updated to versions that contain the necessary security patches. The remediation process should include comprehensive testing to verify that the patch does not introduce compatibility issues with existing VPN configurations and user authentication processes. Organizations should also consider implementing network monitoring solutions that can detect anomalous traffic patterns consistent with buffer overflow exploitation attempts, aligning with ATT&CK framework techniques that target memory corruption vulnerabilities in network services.