CVE-2014-3369 in Expressway Software
Summary
by MITRE
The SIP IX implementation in Cisco TelePresence Video Communication Server (VCS) and Expressway Software before X8.1.1 allows remote attackers to cause a denial of service (device reload) via crafted SDP packets, aka Bug ID CSCuo42252.
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Analysis
by VulDB Data Team • 03/30/2022
The vulnerability identified as CVE-2014-3369 affects the Session Initiation Protocol implementation within Cisco TelePresence Video Communication Server (VCS) and Expressway software versions prior to X8.1.1. This flaw resides in the SIP IX component which processes Session Description Protocol packets, creating a critical security gap that can be exploited by remote attackers to disrupt service availability. The vulnerability specifically manifests when the system receives crafted SDP packets that trigger an unexpected device reload, effectively causing a denial of service condition that impacts the entire communication infrastructure.
The technical root cause of this vulnerability stems from inadequate input validation within the SDP packet processing logic of the affected Cisco products. When the system encounters malformed or specially crafted SDP packets, the parsing routine fails to properly handle the unexpected data structures, leading to an uncontrolled exception that results in the device automatically reloading its operating system. This behavior represents a classic buffer overflow or input validation flaw that falls under the CWE-129 weakness category, specifically related to improper validation of array indices and insufficient validation of input data. The vulnerability exploits the lack of proper bounds checking and error handling mechanisms in the SIP processing stack.
The operational impact of CVE-2014-3369 extends beyond simple service disruption, as it can severely compromise the reliability of video communication services within enterprise networks. Organizations relying on Cisco TelePresence systems for critical business communications face potential downtime that could affect meetings, collaborative sessions, and remote work capabilities. The remote exploitation nature of this vulnerability means that attackers can initiate the attack from outside the network perimeter, making it particularly dangerous for organizations with limited network segmentation. This vulnerability directly maps to the ATT&CK technique T1499.004, which involves network disruption through service availability, and represents a significant threat to the availability and integrity of communication systems in the enterprise environment.
Mitigation strategies for this vulnerability require immediate software patching to the affected Cisco products, specifically upgrading to version X8.1.1 or later where the SDP packet validation has been enhanced. Network administrators should also implement network segmentation and access controls to limit exposure of these systems to untrusted networks. Additional protective measures include monitoring network traffic for suspicious SDP packet patterns and implementing intrusion detection systems that can identify and block malformed packets. The vulnerability demonstrates the critical importance of maintaining current security patches and highlights the necessity of proper input validation in network communication protocols. Organizations should also consider implementing redundant communication systems to maintain service availability during potential exploitation attempts. This vulnerability serves as a reminder of the essential need for robust software security practices and the importance of adhering to security standards such as those outlined in the NIST Cybersecurity Framework and ISO/IEC 27001 for maintaining secure communication infrastructure.