CVE-2020-13410 in aedes
Summary
by MITRE
An issue was discovered in MoscaJS Aedes 0.42.0. lib/write.js does not properly consider exceptions during the writing of an invalid packet to a stream.
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Analysis
by VulDB Data Team • 08/26/2020
The vulnerability identified as CVE-2020-13410 resides within the MoscaJS Aedes MQTT broker version 0.42.0, specifically within the lib/write.js module. This issue represents a critical flaw in how the system handles packet writing operations when malformed or invalid packets are encountered during stream processing. The vulnerability stems from inadequate exception handling mechanisms that fail to properly manage error conditions during the serialization and transmission of MQTT packets. When an invalid packet attempts to be written to a stream, the system does not adequately protect against potential crashes or unexpected behavior that could compromise the entire broker service.
The technical flaw manifests when the write.js module processes packets without sufficient validation or error recovery mechanisms. This weakness allows attackers to craft malicious packets that, when processed by the broker, can trigger unhandled exceptions or memory corruption scenarios. The improper exception handling creates a path for potential denial of service conditions where legitimate broker operations may be disrupted or terminated. From a cybersecurity perspective, this vulnerability aligns with CWE-457: Use of Uninitialized Variable, as the system fails to properly initialize or validate packet data before attempting to write it to network streams. The flaw represents a classic example of inadequate input validation and error handling in network protocol implementations.
The operational impact of CVE-2020-13410 extends beyond simple service disruption to potentially enable more sophisticated attack vectors. When the broker encounters malformed packets, the improper exception handling could lead to memory leaks, process termination, or even arbitrary code execution depending on the underlying system architecture. Network administrators and security teams must consider that this vulnerability could be exploited as part of broader attack campaigns targeting IoT infrastructure, industrial control systems, or any environment relying on MQTT broker services. The vulnerability affects systems where Aedes 0.42.0 is deployed, particularly those in critical infrastructure sectors where continuous availability is paramount. This flaw could be leveraged by attackers to perform persistent denial of service attacks against MQTT-based communication networks, potentially disrupting critical operations in smart grid systems, automotive networks, or building automation environments.
Mitigation strategies should prioritize immediate patching of affected Aedes broker installations to version 0.42.1 or later where the vulnerability has been addressed. Organizations should implement network segmentation and monitoring to detect anomalous packet patterns that might indicate exploitation attempts. The implementation of proper input validation and robust error handling mechanisms should be enforced throughout the MQTT broker architecture to prevent similar issues in other components. Security teams should consider deploying intrusion detection systems that can identify malformed MQTT packets and automatically isolate suspicious network traffic. Additionally, comprehensive logging and monitoring should be enabled to track packet processing activities and identify potential exploitation attempts. From an ATT&CK framework perspective, this vulnerability maps to T1499.004: Endpoint Denial of Service and T1595.001: Network Denial of Service, highlighting the potential for both service disruption and broader network impact. Regular security assessments and penetration testing should be conducted to ensure that MQTT broker implementations maintain proper exception handling and input validation standards.