CVE-2011-3169 in TCP-IP Services
Summary
by MITRE
Unspecified vulnerability in the SMTP service implementation in HP TCP/IP Services 5.6 and 5.7 for OpenVMS allows remote attackers to cause a denial of service via unknown vectors.
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Analysis
by VulDB Data Team • 01/16/2018
The vulnerability identified as CVE-2011-3169 represents a critical security flaw within the SMTP service implementation of HP TCP/IP Services versions 5.6 and 5.7 running on OpenVMS operating systems. This unspecified weakness in the mail transfer agent implementation creates a potential attack surface that remote adversaries can exploit to disrupt normal service operations. The vulnerability specifically targets the Simple Mail Transfer Protocol functionality that forms the backbone of email communication systems, making it particularly concerning for organizations relying on email infrastructure for business operations.
The technical nature of this vulnerability manifests as a denial of service condition that can be triggered through unspecified attack vectors, suggesting that the flaw may involve memory corruption, buffer overflow conditions, or improper input validation within the SMTP service processing logic. Such vulnerabilities typically arise from inadequate error handling mechanisms or insufficient validation of incoming network data that could cause the service to crash or become unresponsive. The lack of specific details in the original CVE description indicates that the exact technical mechanism remains undisclosed, which is common for vulnerabilities that have not been fully analyzed or for which the vendor has not provided complete technical details.
From an operational perspective, this vulnerability poses significant risks to organizations utilizing OpenVMS systems with HP TCP/IP Services, as it can result in complete disruption of email services and potentially impact broader business operations that depend on mail communication. The remote attack vector means that adversaries can exploit this weakness from outside the network perimeter without requiring local access or authentication, making it particularly dangerous for enterprise environments. The impact extends beyond simple service interruption, as email systems often serve as critical communication channels for business processes, system alerts, and user notifications, making this vulnerability a potential catalyst for operational disruptions and security incidents.
Organizations should implement immediate mitigation strategies including applying available vendor patches and updates, implementing network segmentation to limit exposure, and establishing monitoring procedures to detect potential exploitation attempts. The vulnerability aligns with CWE-119 which addresses weaknesses in memory handling and buffer management, and may also relate to ATT&CK technique T1499 which covers network denial of service attacks. Security teams should also consider implementing intrusion detection systems to monitor for suspicious SMTP traffic patterns and establish incident response procedures for potential exploitation events. The vulnerability demonstrates the importance of maintaining up-to-date security patches for specialized operating systems and network services, particularly in mission-critical environments where email availability is essential for business continuity.