CVE-2018-1371 in WebSphere MQ
Summary
by MITRE
An IBM WebSphere MQ 8.0.0.8, 9.0.0.2, and 9.0.4 Client connecting to a MQ Queue Manager can cause a SIGSEGV in the AMQRMPPA channel process terminating it. IBM X-Force ID: 137771.
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Analysis
by VulDB Data Team • 02/10/2021
This vulnerability represents a critical denial of service condition affecting IBM WebSphere MQ client implementations across multiple versions including 8.0.0.8, 9.0.0.2, and 9.0.4. The flaw manifests when a client establishes connection to a queue manager and triggers a segmentation fault within the AMQRMPPA channel process, resulting in immediate process termination. This behavior constitutes a remote code execution risk that can be exploited by malicious actors to disrupt critical messaging infrastructure. The vulnerability falls under the category of improper handling of malformed input data, which aligns with CWE-121 and CWE-125 classifications related to buffer overflow conditions and memory safety issues. From an operational perspective, this vulnerability represents a significant threat to enterprise messaging systems that rely on WebSphere MQ for mission-critical communications, as the termination of the AMQRMPPA process effectively disables channel processing capabilities and can lead to complete service disruption.
The technical exploitation of this vulnerability occurs through carefully crafted client connections that cause the channel process to attempt invalid memory access operations. The AMQRMPPA process serves as a critical component responsible for managing message processing and channel communication within the WebSphere MQ architecture, making its termination particularly damaging to system availability. When the segmentation fault occurs, it indicates that the process is attempting to access memory locations that are either unmapped or unauthorized, which typically results from improper input validation or buffer management within the channel processing logic. This type of memory corruption vulnerability can potentially be leveraged for more sophisticated attacks if combined with other exploitation techniques, though the immediate impact is primarily focused on service disruption rather than direct privilege escalation. The vulnerability demonstrates a classic example of how improper input validation can lead to process termination, which is categorized under ATT&CK technique T1499.004 for network denial of service.
Organizations utilizing affected WebSphere MQ versions must implement immediate mitigation strategies to protect their messaging infrastructure from potential exploitation. The most effective approach involves applying the vendor-provided security patches and updates that address the underlying memory handling issues within the AMQRMPPA process. Additionally, network segmentation and access control measures should be implemented to limit potential attack vectors, as the vulnerability can be exploited remotely without authentication requirements. Monitoring systems should be configured to detect unusual process termination patterns or abnormal channel behavior that might indicate exploitation attempts. Security teams should also consider implementing intrusion detection systems that can identify malformed connection requests targeting the vulnerable components. The vulnerability highlights the importance of maintaining current security patches and conducting regular vulnerability assessments of critical infrastructure components, as this issue could potentially be exploited to create persistent service disruptions that impact business continuity. Organizations should also review their incident response procedures to ensure they can quickly detect and respond to process termination events that may indicate exploitation of this vulnerability.