CVE-2016-6085 in BigFix Platform
Summary
by MITRE
IBM BigFix Platform could allow an attacker on the local network to crash the BES and relay servers.
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Analysis
by VulDB Data Team • 08/09/2020
The vulnerability identified as CVE-2016-6085 affects the IBM BigFix Platform, a comprehensive endpoint management solution widely deployed across enterprise environments for security monitoring and compliance enforcement. This critical weakness resides within the platform's server components, specifically impacting both BigFix Enterprise Server (BES) and BigFix Relay servers that form the backbone of the BigFix management infrastructure. The vulnerability stems from insufficient input validation and authentication mechanisms within the communication protocols used by these servers to process incoming requests from managed endpoints.
The technical flaw manifests as a lack of proper authentication checks and input sanitization in the server response handling mechanisms. When malicious actors on the local network send specially crafted requests to the BES or Relay servers, they can exploit this weakness to trigger denial-of-service conditions that cause the affected servers to crash or become unresponsive. The vulnerability does not require elevated privileges to exploit, making it particularly dangerous as it can be leveraged by attackers who have already gained access to the local network through various means such as network sniffing, man-in-the-middle attacks, or compromised endpoints. The attack vector operates through the standard BigFix communication protocols that are designed to facilitate management operations between the central servers and distributed endpoint agents.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise the entire endpoint management infrastructure. When BES and Relay servers crash, organizations lose visibility into their managed endpoints, preventing security policies from being enforced and disabling critical monitoring capabilities. This creates a window of opportunity for attackers to move laterally within the network undetected while security teams lose the ability to respond to emerging threats through their BigFix platform. The cascading effects can be particularly severe in large enterprise environments where the BigFix platform serves as the primary mechanism for security patch deployment, compliance auditing, and real-time threat detection. Organizations may find themselves unable to maintain control over their endpoint security posture during the period when servers are down, potentially allowing persistent threats to establish deeper footholds within the network.
Mitigation strategies for CVE-2016-6085 should focus on both immediate defensive measures and long-term architectural improvements to secure the BigFix platform. Organizations should implement network segmentation to isolate BigFix servers from general network traffic, utilizing firewalls and access control lists to restrict communication to only trusted endpoints. Applying the official IBM security patches released to address this vulnerability represents the primary remediation approach, though organizations should also consider implementing additional authentication layers and monitoring solutions to detect anomalous behavior patterns that might indicate exploitation attempts. The vulnerability aligns with CWE-284, which addresses improper access control in software systems, and maps to ATT&CK technique T1071.004 for application layer protocol, highlighting the importance of securing communication protocols and implementing robust authentication mechanisms. Network administrators should also establish continuous monitoring of BigFix server performance and implement automated alerting systems to detect server crashes or unusual network traffic patterns that could indicate exploitation attempts.