CVE-2018-1374 in WebSphere MQ
Summary
by MITRE
An IBM WebSphere MQ (Maintenance levels 7.1.0.0 - 7.1.0.9, 7.5.0.0 - 7.5.0.8, 8.0.0.0 - 8.0.0.8, 9.0.0.0 - 9.0.0.2, and 9.0.0 - 9.0.4) client connecting to a Queue Manager could cause a SIGSEGV in the Channel process amqrmppa. IBM X-Force ID: 137775.
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Analysis
by VulDB Data Team • 03/29/2023
This vulnerability in IBM WebSphere MQ represents a critical memory corruption issue that affects multiple versions of the messaging middleware across different release streams. The flaw manifests as a segmentation fault occurring in the Channel process named amqrmppa which is responsible for managing communication channels between clients and queue managers. The vulnerability arises from improper handling of certain client connection parameters that lead to invalid memory access patterns during the channel processing lifecycle. This represents a classic buffer overflow or memory corruption scenario that can be exploited to cause application crashes and potentially lead to more severe system instability.
The technical implementation of this vulnerability involves the amqrmppa process receiving malformed or specially crafted connection data from a client application that triggers an unexpected memory access operation. When the channel process attempts to process these invalid inputs, it accesses memory locations that have not been properly allocated or validated, resulting in the SIGSEGV signal being generated. This type of fault condition falls under the CWE-125 vulnerability category, which describes out-of-bounds read conditions that can lead to memory corruption and system instability. The vulnerability affects the core messaging functionality of WebSphere MQ and can disrupt queue manager operations, causing service interruptions that may impact critical business processes relying on message queuing.
The operational impact of this vulnerability extends beyond simple application crashes to potentially affect enterprise messaging infrastructure and business continuity. When the amqrmppa process terminates due to segmentation fault, it can cause channel failures that prevent legitimate clients from communicating with the queue manager, leading to message delivery delays or complete communication breakdowns. This affects organizations that depend on WebSphere MQ for mission-critical data exchange between applications, systems, and services. The vulnerability can be particularly disruptive in high-availability environments where queue manager stability is essential, as channel failures may trigger automatic failover mechanisms and service degradation. The ATT&CK framework categorizes this as a system service interruption tactic, where adversaries can exploit memory corruption vulnerabilities to disrupt availability of critical messaging services.
Organizations affected by this vulnerability should prioritize immediate patching of all impacted WebSphere MQ versions to prevent exploitation and maintain system stability. The recommended mitigation strategy involves applying the official IBM security patches that address the memory corruption in the amqrmppa channel process. System administrators should also implement monitoring solutions to detect abnormal channel termination patterns that may indicate exploitation attempts. Additional defensive measures include network segmentation to limit client access to queue managers, implementing strict access controls on channel configurations, and conducting regular security assessments of messaging infrastructure. Organizations should also consider implementing intrusion detection systems that can identify suspicious connection patterns or malformed data that may indicate attempts to exploit this vulnerability. The vulnerability highlights the importance of maintaining up-to-date security patches for enterprise messaging systems and demonstrates how seemingly minor flaws in middleware components can have significant operational consequences for business-critical applications.