CVE-2020-36282 in JMS Client for RabbitMQ
Summary
by MITRE • 03/12/2021
JMS Client for RabbitMQ 1.x before 1.15.2 and 2.x before 2.2.0 is vulnerable to unsafe deserialization that can result in code execution via crafted StreamMessage data.
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Analysis
by VulDB Data Team • 03/31/2021
The vulnerability identified as CVE-2020-36282 affects the JMS Client for RabbitMQ versions 1.x prior to 1.15.2 and 2.x prior to 2.2.0, representing a critical unsafe deserialization flaw that exposes systems to remote code execution. This vulnerability resides within the message processing mechanisms of the RabbitMQ JMS client implementation, where the system fails to properly validate and sanitize incoming StreamMessage data before deserializing it into Java objects. The flaw stems from the client's inability to distinguish between legitimate and malicious serialized data streams, creating an attack surface where adversaries can craft specifically formatted StreamMessage payloads designed to exploit the deserialization process.
The technical exploitation of this vulnerability occurs when a malicious actor sends a crafted StreamMessage to a RabbitMQ broker that is being monitored by an affected JMS client. The client receives the message and attempts to deserialize the embedded data without proper validation, allowing the attacker to inject malicious Java objects that execute arbitrary code on the target system. This type of vulnerability maps directly to CWE-502, which specifically addresses unsafe deserialization patterns in software systems. The attack vector is particularly dangerous because it leverages the legitimate messaging infrastructure of RabbitMQ, making it difficult to detect and distinguish from normal operational traffic.
The operational impact of this vulnerability extends beyond simple code execution to encompass complete system compromise and potential lateral movement within network environments. An attacker who successfully exploits this vulnerability can gain full control over systems running affected JMS clients, potentially leading to data exfiltration, privilege escalation, and persistence mechanisms. The vulnerability affects organizations using RabbitMQ in enterprise messaging scenarios where JMS compatibility is required, particularly in financial services, healthcare, and government sectors where message queue systems handle sensitive data flows. According to ATT&CK framework, this vulnerability maps to T1059.007 for command and scripting interpreter and T1021.001 for remote services, as the exploitation enables remote code execution through legitimate messaging protocols.
Organizations should immediately implement mitigation strategies including updating to patched versions of the RabbitMQ JMS client, implementing network segmentation to limit access to message brokers, and deploying monitoring solutions that can detect anomalous deserialization patterns. The recommended remediation involves upgrading to JMS Client for RabbitMQ version 1.15.2 or 2.2.0, which includes proper input validation and deserialization safeguards. Additional protective measures include implementing application whitelisting policies, enabling secure deserialization practices through configuration changes, and conducting comprehensive security assessments of message queue infrastructure to identify other potential vulnerabilities in related components. Security teams should also establish incident response procedures specifically addressing message queue security incidents and maintain detailed audit logs of all message processing activities for forensic analysis.