CVE-2015-7559 in ActiveMQ Client
Summary
by MITRE
It was found that the Apache ActiveMQ client before 5.15.5 exposed a remote shutdown command in the ActiveMQConnection class. An attacker logged into a compromised broker could use this flaw to achieve denial of service on a connected client.
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Analysis
by VulDB Data Team • 11/17/2024
The vulnerability identified as CVE-2015-7559 represents a critical security flaw in Apache ActiveMQ client implementations prior to version 5.15.5. This issue stems from an improper access control mechanism within the ActiveMQConnection class that inadvertently exposes a remote shutdown command to authenticated attackers. The flaw exists in the messaging infrastructure that connects clients to message brokers, creating a pathway for malicious actors to exploit legitimate authentication credentials for destructive purposes.
The technical implementation of this vulnerability involves the ActiveMQ client's handling of administrative commands within the connection management layer. When a user authenticates to an ActiveMQ broker, the client maintains a connection that includes mechanisms for remote management operations. The flaw occurs because the shutdown command, which should only be accessible through secure administrative channels, remains exposed through the connection interface. This exposure allows authenticated attackers to send malicious shutdown signals to connected clients, effectively disrupting the messaging services without requiring additional privileges or complex attack vectors.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as it fundamentally undermines the security model of the messaging system. Attackers who gain access to a compromised broker can leverage this flaw to target connected clients across the messaging network, potentially causing cascading failures throughout distributed systems that depend on ActiveMQ for communication. The vulnerability particularly affects environments where multiple clients are connected to a single broker, as a single successful exploitation can compromise numerous endpoints simultaneously. This characteristic makes it especially dangerous in enterprise environments where ActiveMQ serves as a critical component of business-critical messaging infrastructure.
Organizations affected by CVE-2015-7559 should implement immediate mitigation strategies including upgrading to ActiveMQ version 5.15.5 or later, which addresses the vulnerability through proper access control enforcement. Network segmentation and firewall rules should be configured to limit direct access to ActiveMQ broker endpoints from untrusted networks. The principle of least privilege should be enforced by restricting administrative access to broker components and implementing strong authentication mechanisms. Additionally, monitoring solutions should be deployed to detect anomalous shutdown commands or unauthorized connection management operations. This vulnerability aligns with CWE-284, which addresses improper access control in software systems, and maps to ATT&CK technique T1499.004 for network denial of service attacks. Security teams should also consider implementing intrusion detection systems specifically configured to identify patterns associated with shutdown command exploitation attempts.
The broader implications of this vulnerability highlight the importance of proper access control implementation in distributed messaging systems. Organizations should conduct comprehensive security assessments of their messaging infrastructure to identify similar exposure points and ensure that administrative interfaces remain properly secured. Regular security updates and patch management processes should be prioritized to address such vulnerabilities before they can be exploited in production environments. The flaw demonstrates how seemingly minor access control oversights in client libraries can create significant security risks in enterprise messaging architectures.