CVE-2019-4208 in TRIRIGA Application Platform
Summary
by MITRE
IBM TRIRIGA Application Platform 3.5.3 and 3.6.0 is vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources. IBM X-Force ID: 159129.
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Analysis
by VulDB Data Team • 09/12/2023
The vulnerability identified as CVE-2019-4208 affects IBM TRIRIGA Application Platform versions 3.5.3 and 3.6.0, representing a critical XML External Entity Injection flaw that exposes the system to remote exploitation. This vulnerability falls under the Common Weakness Enumeration category CWE-611, which specifically addresses improper restriction of XML external entity references. The flaw exists in the platform's XML processing capabilities where the application fails to properly validate or sanitize external entity references during XML data parsing operations. Attackers can leverage this weakness by crafting malicious XML payloads that reference external resources, potentially leading to information disclosure or denial of service conditions.
The technical implementation of this XXE vulnerability allows remote attackers to manipulate the XML parser within the TRIRIGA platform to resolve external entities and access internal system resources. When the platform processes malformed XML data containing external entity declarations, it can inadvertently fetch and process resources from external servers or internal network locations. This behavior enables attackers to perform server-side request forgery attacks, access local files through file URI schemes, or consume excessive memory resources through entity expansion attacks. The vulnerability is particularly dangerous because it operates at the XML parsing layer, which is fundamental to many data processing operations within the application platform.
From an operational perspective, this vulnerability presents significant risks to organizations using IBM TRIRIGA Application Platform as it can be exploited without authentication, making it particularly attractive to threat actors. The potential impact includes unauthorized data access where sensitive information could be exfiltrated through external entity references, system resource exhaustion leading to denial of service conditions, and possible escalation to more severe attacks depending on the system configuration. Organizations utilizing this platform may face regulatory compliance issues if sensitive data is compromised, and the vulnerability could be leveraged as a stepping stone for further network penetration attempts. The attack surface is broad as any application functionality that accepts XML input or processes XML data is potentially vulnerable to this exploitation vector.
Organizations should implement immediate mitigations including disabling external entity resolution in XML parsers, implementing proper input validation and sanitization for all XML processing operations, and applying the vendor-provided security patches as soon as they become available. Network segmentation and monitoring should be enhanced to detect suspicious XML traffic patterns that may indicate exploitation attempts. The mitigation strategy should align with established security frameworks and best practices, including implementing the principle of least privilege for XML processing components and conducting regular security assessments of XML handling code. Additionally, organizations should consider implementing web application firewalls and XML validation rules to prevent malformed XML from reaching the vulnerable parsing components, as this vulnerability represents a classic example of how improper input handling can lead to severe security consequences.