CVE-2017-3969 in Network Security Management
Summary
by MITRE
Abuse of communication channels vulnerability in the server in McAfee Network Security Management (NSM) before 8.2.7.42.2 allows man-in-the-middle attackers to decrypt messages via an inadequate implementation of SSL.
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Analysis
by VulDB Data Team • 02/26/2023
The vulnerability identified as CVE-2017-3969 represents a critical security flaw in McAfee Network Security Management (NSM) server implementations prior to version 8.2.7.42.2. This weakness falls under the category of communication channel abuse, specifically targeting the secure socket layer implementation that governs encrypted communications between network security components. The vulnerability stems from an inadequate SSL implementation that fails to properly establish secure communication channels, creating exploitable conditions for malicious actors to intercept and decrypt sensitive network traffic.
The technical flaw manifests in the server's insufficient handling of SSL/TLS cryptographic protocols, which allows attackers to perform man-in-the-middle attacks against the communication infrastructure. This inadequate implementation likely involves weak cryptographic parameters, improper certificate validation mechanisms, or flawed key exchange processes that enable adversaries to establish unauthorized communication channels. The vulnerability specifically affects the server component of NSM, meaning that while client-side systems may be protected, the central management server becomes a prime target for attackers seeking to compromise network security data flows. This weakness directly violates the fundamental principles of secure communication as outlined in industry standards such as CWE-310 and CWE-326, which address cryptographic implementation flaws and weak encryption practices.
The operational impact of this vulnerability extends beyond simple data interception, potentially enabling attackers to access sensitive network security information, manipulate security policies, and compromise the integrity of network monitoring data. Organizations using affected NSM versions face significant risks including unauthorized access to network traffic analysis, potential exposure of security event data, and the possibility of undetected malicious activity within their network infrastructure. The man-in-the-middle attack vector allows adversaries to not only decrypt communications but also to inject malicious data or modify existing traffic, potentially leading to complete compromise of the network security management system. This vulnerability particularly impacts organizations relying on McAfee NSM for centralized network security management, as it undermines the trust model that security administrators depend upon for effective network monitoring and threat detection.
Mitigation strategies for CVE-2017-3969 should prioritize immediate deployment of the vendor-provided security patches released for NSM version 8.2.7.42.2 and subsequent releases. Organizations must also implement additional network-level protections including enhanced monitoring for suspicious communication patterns, deployment of network segmentation measures, and implementation of alternative encryption protocols where feasible. The vulnerability demonstrates the critical importance of maintaining up-to-date security software and highlights the necessity of regular vulnerability assessments and penetration testing to identify similar cryptographic implementation flaws. Security teams should also consider implementing network intrusion detection systems that can identify man-in-the-middle attack patterns and establish baseline network communication behaviors to detect anomalous activity that may indicate exploitation attempts. This vulnerability aligns with ATT&CK technique T1041, which covers data compression and encryption, and represents a classic example of how cryptographic weakness can undermine the security posture of enterprise network management systems.