CVE-2014-3630 in Play
Summary
by MITRE
XML external entity (XXE) vulnerability in the Java XML processing functionality in Play before 2.2.6 and 2.3.x before 2.3.5 might allow remote attackers to read arbitrary files, cause a denial of service, or have unspecified other impact via crafted XML data.
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Analysis
by VulDB Data Team • 12/18/2019
The CVE-2014-3630 vulnerability represents a critical XML external entity processing flaw within the Java XML parsing capabilities of the Play web framework. This vulnerability specifically affects Play versions prior to 2.2.6 and 2.3.x versions before 2.3.5, creating a significant security risk for applications that process XML data. The flaw stems from insufficient validation of external entity references during XML parsing operations, allowing malicious actors to exploit the framework's XML processing functionality through crafted XML input. The vulnerability is categorized under CWE-611, which addresses improper restriction of XML external entity reference, making it a direct descendant of well-known XML processing security weaknesses that have plagued various software systems. This issue falls within the ATT&CK matrix under technique T1213 - Data from Information Repositories, as it enables attackers to extract sensitive data through manipulated XML entities.
The technical exploitation of this XXE vulnerability occurs when the Play framework processes XML input without proper safeguards against external entity references. Attackers can construct malicious XML payloads that reference external resources or local files on the server, enabling them to read arbitrary files from the filesystem. The vulnerability manifests because the XML parser does not properly restrict access to external entities, allowing attackers to leverage this functionality to access sensitive files such as configuration files, database credentials, or application source code. The impact extends beyond data exfiltration to include potential denial of service conditions, as attackers can craft XML payloads that consume excessive system resources or trigger parsing errors. Additionally, the vulnerability may enable more sophisticated attacks such as server-side request forgery or internal network reconnaissance, where attackers can probe internal systems through the vulnerable XML processing functionality.
The operational impact of CVE-2014-3630 is substantial for organizations running affected Play framework versions, as it provides attackers with a straightforward path to unauthorized data access and system compromise. Applications that accept XML input from untrusted sources become immediately vulnerable, including web services, API endpoints, and any system components that process XML documents. The vulnerability's exploitation requires minimal technical skill, making it particularly dangerous as it can be leveraged by attackers with basic knowledge of XXE exploitation techniques. Organizations may experience data breaches, compliance violations, and system downtime as a result of successful exploitation. The vulnerability also affects the overall security posture of applications, as it demonstrates poor input validation practices and inadequate security controls around XML processing. Security teams face increased incident response burden when this vulnerability exists, as it requires immediate remediation and potentially extensive system auditing to identify affected components.
Mitigation strategies for CVE-2014-3630 focus primarily on upgrading to patched versions of the Play framework, specifically versions 2.2.6 and 2.3.5 or later. Organizations should implement comprehensive patch management procedures to ensure all affected systems receive updates promptly. Additionally, developers should disable external entity processing in XML parsers by configuring appropriate parser settings and implementing strict input validation measures. The use of secure XML parsing libraries and frameworks that properly handle external entity references can significantly reduce the attack surface. Network-level controls such as firewalls and intrusion detection systems can help monitor for suspicious XML traffic patterns, while application-level security measures including XML schema validation and input sanitization provide additional protection layers. Organizations should also conduct thorough security testing of XML processing components and implement security code reviews to identify potential XXE vulnerabilities in custom implementations. Regular security assessments and vulnerability scanning should be performed to ensure ongoing protection against similar threats. The remediation process should include comprehensive testing to verify that patches do not introduce compatibility issues with existing application functionality while ensuring that XML processing security is properly addressed.