CVE-2016-6084 in BigFix Platform
Summary
by MITRE
IBM BigFix Platform could allow an attacker on the local network to crash the BES server using a specially crafted XMLSchema request.
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Analysis
by VulDB Data Team • 08/09/2020
The vulnerability identified as CVE-2016-6084 affects the IBM BigFix Platform, a comprehensive endpoint management solution widely deployed in enterprise environments for software deployment, compliance monitoring, and security management. This critical flaw resides within the platform's handling of XMLSchema requests, specifically targeting the BigFix Enterprise Server component that serves as the central management hub for endpoint operations. The vulnerability represents a denial-of-service condition that can be exploited by adversaries positioned within the local network, potentially compromising the integrity of critical enterprise management infrastructure.
The technical root cause of this vulnerability stems from inadequate input validation within the XMLSchema processing functionality of the BES server. When the server receives a malformed or specially crafted XMLSchema request, it fails to properly validate the incoming data structure, leading to a crash condition that terminates the server process. This represents a classic buffer overflow or parsing error scenario where the system does not adequately sanitize user-supplied input before processing. The vulnerability is particularly concerning because it requires minimal privileges to exploit, as the attacker only needs network access to the local network segment where the server operates, making it accessible to insider threats or compromised network devices.
From an operational impact perspective, this vulnerability poses significant risks to enterprise security operations as the BigFix server serves as a critical management component for large-scale endpoint deployments. A successful exploitation could result in complete service disruption, preventing administrators from managing endpoints, deploying security patches, or monitoring compliance status. The attack vector is particularly dangerous because it operates at the network level, allowing attackers to leverage the local network access to target the management infrastructure. This vulnerability directly impacts the availability aspect of the CIA triad and can be classified under CWE-129 as an input validation error that permits processing of improperly validated input, with potential for escalation to more severe attack vectors.
The exploitation of this vulnerability aligns with several tactics described in the MITRE ATT&CK framework, particularly focusing on privilege escalation and defense evasion techniques. Attackers could leverage this weakness as part of a broader attack chain to compromise endpoint management infrastructure, potentially leading to further network infiltration or persistent access. The vulnerability's impact extends beyond simple service disruption as it undermines the trust model of enterprise security management systems. Organizations relying on BigFix for critical security operations face potential exposure to extended attack windows where their endpoint management capabilities are disabled, creating opportunities for additional compromise.
Organizations should implement immediate mitigations including network segmentation to isolate the BigFix server from general network traffic, deploying firewall rules to restrict XMLSchema request handling, and applying the vendor-provided security patches. The recommended approach involves establishing network access controls that limit which systems can communicate with the BES server's XML processing endpoints, while also implementing monitoring solutions to detect anomalous XMLSchema request patterns. Additionally, organizations should conduct thorough vulnerability assessments to identify all instances of the affected platform and ensure proper patch management procedures are in place to prevent similar vulnerabilities from accumulating in the environment.