CVE-2015-5606 in Vordel XML Gateway
Summary
by MITRE
Vordel XML Gateway (acquired by Axway) version 7.2.2 could allow remote attackers to cause a denial of service via a specially crafted request.
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Analysis
by VulDB Data Team • 08/21/2023
The vulnerability identified as CVE-2015-5606 affects Vordel XML Gateway version 7.2.2, a middleware product that serves as an API gateway and integration platform. This particular flaw represents a denial of service vulnerability that can be exploited by remote attackers without requiring authentication or privileged access. The vulnerability stems from insufficient input validation mechanisms within the gateway's processing pipeline, specifically when handling malformed or specially crafted XML requests that are designed to trigger unexpected behavior in the underlying processing engine.
The technical implementation of this vulnerability involves the gateway's failure to properly sanitize and validate incoming XML requests before processing them through its internal parsing and routing mechanisms. When a malicious actor sends a crafted request that exploits memory handling or buffer management flaws within the XML parsing component, the system can become unresponsive or crash entirely. This behavior typically occurs because the gateway's XML parser does not implement proper bounds checking or resource management controls that would prevent excessive memory consumption or stack overflow conditions during the parsing process. The vulnerability manifests as a complete service disruption that prevents legitimate users from accessing the gateway functionality, effectively rendering the system unavailable for business operations.
The operational impact of CVE-2015-5606 extends beyond simple service interruption as it can result in significant business disruption for organizations relying on the Vordel XML Gateway for critical API management and integration services. Attackers can leverage this vulnerability to perform sustained denial of service attacks that may require system restarts or manual intervention to restore normal operations. The vulnerability's remote exploitability means that attackers can target the system from anywhere on the network without requiring physical access or local credentials, making it particularly dangerous in environments where the gateway is exposed to untrusted networks. Organizations using this version of the gateway may experience extended downtime while incident response teams investigate and remediate the vulnerability, potentially affecting multiple downstream services that depend on the gateway's functionality.
Organizations should implement immediate mitigations including applying the vendor-provided security patches that address the input validation deficiencies in the XML processing component. Network segmentation and access control measures should be enforced to limit exposure of the gateway to untrusted networks while monitoring for unusual traffic patterns that may indicate exploitation attempts. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and may also relate to CWE-122 for heap-based buffer overflows that could occur during XML parsing operations. From an ATT&CK framework perspective, this vulnerability maps to the T1499.004 technique related to network denial of service, and could potentially enable further attacks through the subsequent compromise of the gateway's management interfaces. Regular vulnerability scanning and penetration testing should be conducted to identify similar input validation weaknesses in other components of the organization's API management infrastructure, while implementing proper logging and monitoring to detect exploitation attempts. The affected version represents a specific software release that requires immediate attention through vendor advisories and security updates to prevent exploitation by threat actors.