CVE-2017-1628 in Business Process Manager
Summary
by MITRE
IBM Business Process Manager 8.6.0.0 allows authenticated users to stop and resume the Event Manager by calling a REST API with incorrect authorization checks.
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Analysis
by VulDB Data Team • 01/25/2021
The vulnerability identified as CVE-2017-1628 resides within IBM Business Process Manager version 8.6.0.0, a comprehensive business process management platform designed for enterprise workflow automation and orchestration. This security flaw represents a critical authorization bypass issue that directly impacts the platform's ability to enforce proper access controls for critical system components. The vulnerability specifically affects the Event Manager functionality, which serves as a core component responsible for monitoring and processing business events within the BPM environment, making it a prime target for malicious actors seeking to disrupt business operations or gain unauthorized access to sensitive process data.
The technical implementation of this vulnerability stems from inadequate authorization checks within the REST API endpoints that control Event Manager operations. When authenticated users interact with the system through the designated API calls, the platform fails to properly validate whether the requesting user possesses the necessary administrative privileges to perform stop and resume operations on the Event Manager service. This authorization flaw allows any authenticated user, regardless of their role or permissions level, to execute these critical system functions through legitimate API interfaces. The issue manifests as a direct violation of the principle of least privilege, where users can perform administrative actions without proper authorization validation, effectively creating a backdoor for unauthorized system manipulation.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it enables attackers to disrupt critical business processes and potentially cause significant operational downtime. By stopping the Event Manager, malicious actors can halt the processing of business events, leading to workflow failures, data inconsistencies, and potential financial losses for organizations relying on these automated processes. The ability to resume the Event Manager after stopping it provides attackers with additional flexibility to conduct prolonged disruption campaigns or to perform malicious activities during the service interruption period. This vulnerability particularly affects organizations that depend heavily on real-time event processing and automated business workflows, where even brief service interruptions can cascade into broader operational failures.
From a cybersecurity perspective, this vulnerability aligns with CWE-285, which addresses improper authorization issues in software systems, and represents a clear violation of the authorization controls that should protect critical system components. The ATT&CK framework categorizes this vulnerability under privilege escalation and defense evasion techniques, as it allows attackers to bypass normal access controls and potentially maintain persistent access to system functions. Organizations should implement immediate mitigations including applying the vendor-provided security patches, reviewing and strengthening access controls for REST API endpoints, and implementing additional monitoring controls to detect unauthorized attempts to manipulate Event Manager services. Network segmentation and API rate limiting should also be considered to reduce the attack surface and prevent abuse of the vulnerable interface.
The broader implications of this vulnerability highlight the importance of proper authorization validation in enterprise software systems, particularly those handling critical business processes. IBM Business Process Manager environments should undergo comprehensive security assessments to identify similar authorization flaws in other API endpoints and system components. Regular security testing, including penetration testing and code reviews, becomes essential to identify and remediate authorization bypass vulnerabilities before they can be exploited by malicious actors. Organizations should also consider implementing additional logging and alerting mechanisms around Event Manager operations to detect unauthorized activities and maintain audit trails for compliance and forensic purposes.