CVE-2014-0225 in Spring Framework
Summary
by MITRE
When processing user provided XML documents, the Spring Framework 4.0.0 to 4.0.4, 3.0.0 to 3.2.8, and possibly earlier unsupported versions did not disable by default the resolution of URI references in a DTD declaration. This enabled an XXE attack.
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Analysis
by VulDB Data Team • 12/22/2024
The vulnerability identified as CVE-2014-0225 represents a critical security flaw in the Spring Framework that affected multiple versions from 3.0.0 through 4.0.4. This weakness stems from the framework's insufficient handling of XML external entity processing, specifically within Document Type Definition (DTD) declarations. The vulnerability enables an attacker to exploit XML External Entity (XXE) attack vectors by manipulating user-provided XML documents that are processed through the affected Spring components. The flaw exists because the Spring Framework failed to disable URI reference resolution in DTD declarations by default, creating an unintended pathway for malicious actors to access local resources or perform server-side request forgery attacks.
The technical implementation of this vulnerability occurs during XML parsing operations within the Spring Framework's XML processing capabilities. When the framework encounters XML documents containing DTD declarations with URI references, it attempts to resolve these references without proper safeguards. This behavior allows attackers to craft malicious XML payloads that reference external resources, potentially enabling them to read local files, perform port scanning, or even execute server-side requests to internal systems. The vulnerability specifically affects the XML parsing mechanisms used in Spring's web applications, particularly those handling user input through XML-based web services or configuration files. According to CWE classification, this represents a CWE-611 Improper Restriction of XML External Entity Reference, which directly maps to the XXE attack pattern that has been extensively documented in cybersecurity literature and represents one of the most common XML processing vulnerabilities.
The operational impact of CVE-2014-0225 extends beyond simple data exposure, as it can enable attackers to perform a range of malicious activities including unauthorized file access, internal network reconnaissance, and potential privilege escalation within affected systems. Attackers can leverage this vulnerability to read sensitive files from the server filesystem, potentially accessing configuration files, database credentials, or application source code. The vulnerability is particularly dangerous in web applications that process user-supplied XML data, as it allows for server-side request forgery attacks where the application may make unintended requests to internal services. This flaw aligns with ATT&CK technique T1068, which describes the use of remote code execution capabilities through XML external entity processing, and can be exploited as part of broader attack chains targeting web application infrastructure. The vulnerability affects not just the immediate XML processing functionality but also impacts the overall security posture of applications that rely on Spring Framework for their web services and data handling capabilities.
Organizations affected by this vulnerability should implement immediate mitigations including upgrading to patched versions of the Spring Framework where available, or applying manual configuration changes to disable external entity resolution in XML parsers. The recommended approach involves setting appropriate parser configurations to disable DTD processing entirely or to restrict URI resolution in DTD declarations. Security teams should also review their XML processing code to ensure that user input is properly validated and sanitized before being processed through XML parsers. Additional mitigations include implementing web application firewalls to detect and block suspicious XML content, conducting thorough code reviews to identify all XML parsing operations, and establishing proper input validation mechanisms for all user-supplied data. The vulnerability underscores the importance of secure coding practices in XML processing and the necessity of following security guidelines such as those provided by OWASP for preventing XXE attacks. Organizations should also consider implementing monitoring and logging for XML processing activities to detect potential exploitation attempts and maintain comprehensive incident response procedures for handling such security vulnerabilities.