CVE-2017-12264 in Meeting Server
Summary
by MITRE
A vulnerability in the Web Admin Interface of Cisco Meeting Server could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to insufficient bound checks performed by the affected software. An attacker could exploit this vulnerability by sending a malicious HTTP packet to the affected system. A successful exploit could allow the attacker to cause a reload of the Web Admin Server. Cisco Bug IDs: CSCve89149.
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Analysis
by VulDB Data Team • 01/15/2021
The vulnerability identified as CVE-2017-12264 resides within the Web Admin Interface of Cisco Meeting Server, representing a critical security flaw that undermines the system's integrity and availability. This issue manifests as a denial of service condition that can be triggered remotely without authentication, making it particularly dangerous for organizations relying on Cisco Meeting Server for their collaborative infrastructure. The vulnerability stems from inadequate input validation mechanisms within the web interface, specifically failing to implement proper boundary checks on incoming HTTP requests. The affected system processes HTTP packets without sufficient sanitization, creating an exploitable entry point for malicious actors seeking to disrupt service availability. This weakness directly impacts the operational continuity of video conferencing and collaboration systems that depend on Cisco Meeting Server for their administrative functions.
The technical exploitation of this vulnerability involves crafting and transmitting specifically formatted HTTP packets to the targeted Cisco Meeting Server instance. The flaw occurs at the input validation layer where the system fails to properly verify the boundaries of incoming data payloads, allowing malformed requests to bypass normal processing constraints. When the system receives these malicious packets, it processes them without adequate boundary checking, leading to a condition where the Web Admin Server undergoes an unintended restart or reload operation. This behavior constitutes a classic denial of service attack pattern where legitimate service availability is compromised through manipulation of system resources. The vulnerability's impact is amplified by its unauthenticated nature, meaning that any remote attacker with network access can potentially trigger the exploit without requiring valid credentials or privileged access to the system. The specific Cisco Bug ID CSCve89149 documents this issue within the vendor's internal tracking system, indicating that this was recognized as a significant security concern requiring immediate attention and remediation.
The operational implications of this vulnerability extend beyond simple service disruption to potentially compromise the entire collaboration infrastructure that organizations depend upon for business continuity. When the Web Admin Server reloads due to exploitation, administrators lose access to critical management functions, including configuration changes, user management, and system monitoring capabilities. This disruption affects not only the immediate availability of the web interface but also impacts the underlying services that the Cisco Meeting Server supports, potentially causing cascading failures in video conferencing operations. Organizations relying on this system for remote collaboration, telepresence solutions, and virtual meetings face significant operational risks when this vulnerability is exploited. The unauthenticated nature of the attack means that threat actors can initiate DoS conditions without detection, making it difficult for security teams to identify and respond to incidents. Furthermore, the vulnerability's exploitation can be automated, allowing attackers to repeatedly trigger the DoS condition and maintain sustained disruption of service availability. This characteristic aligns with attack patterns documented in the MITRE ATT&CK framework under the denial of service category, specifically targeting the availability aspect of the CIA triad.
Mitigation strategies for CVE-2017-12264 should prioritize immediate patch deployment from Cisco, as the vendor has likely released security advisories and software updates addressing the boundary check deficiencies. Network segmentation and access control measures can provide additional protection by limiting direct exposure of the Web Admin Interface to untrusted networks and implementing firewall rules that restrict HTTP traffic to only authorized administrative networks. Implementing intrusion detection systems that monitor for anomalous HTTP packet patterns can help detect exploitation attempts before they succeed in causing service disruption. Organizations should also establish monitoring procedures to detect unexpected Web Admin Server reloads or restarts, as these events can serve as indicators of attempted exploitation. The vulnerability's classification under CWE-129, which addresses insufficient input validation, underscores the need for comprehensive input sanitization practices throughout the application stack. Security teams should conduct regular vulnerability assessments and penetration testing to identify similar boundary check deficiencies in other system components, as this represents a common class of security flaw that can affect various network applications. Additionally, implementing automated backup and failover mechanisms for critical collaboration infrastructure can help maintain service availability during potential exploitation events, while maintaining detailed logging of all administrative access attempts to support incident response activities.