CVE-2014-3242 in SOAPpy
Summary
by MITRE
SOAPpy 0.12.5 allows remote attackers to read arbitrary files via a SOAP request containing an external entity declaration in conjunction with an entity reference, related to an XML External Entity (XXE) issue.
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Analysis
by VulDB Data Team • 03/04/2025
The vulnerability identified as CVE-2014-3242 represents a critical XML External Entity (XXE) flaw within SOAPpy version 0.12.5, a Python library used for handling SOAP protocol communications. This weakness stems from the library's insufficient validation of XML input, specifically when processing SOAP requests that contain external entity declarations. The flaw enables malicious actors to craft specially formatted SOAP messages that exploit the XML parser's handling of external entities, creating a pathway for unauthorized file access on the server hosting the vulnerable SOAP service.
The technical mechanism of this vulnerability operates through the exploitation of XML parsing behavior where external entity declarations can reference local files on the server filesystem. When SOAPpy processes a SOAP request containing an external entity declaration such as <!ENTITY xxe SYSTEM "file:///etc/passwd"> followed by an entity reference like &xxe;, the XML parser resolves the entity by reading the specified file and embedding its contents into the response. This occurs because the library fails to properly configure the XML parser to disable external entity resolution or to restrict access to local resources during SOAP request processing. The vulnerability is classified under CWE-611 as "Improper Restriction of XML External Entity Reference" and aligns with ATT&CK technique T1213.002 for "Data from Information Repositories" through exploitation of XML parsing vulnerabilities.
The operational impact of this vulnerability is severe and multifaceted, as remote attackers can leverage this XXE flaw to access sensitive files on the server that should remain protected. Attackers can potentially read system configuration files, database credentials, application source code, and other confidential information stored on the server filesystem. The vulnerability affects any system running SOAPpy 0.12.5 that processes SOAP requests from untrusted sources, making it particularly dangerous in enterprise environments where SOAP services often handle sensitive business data. The remote nature of the attack means that adversaries can exploit this vulnerability from anywhere on the network without requiring local system access or authentication, significantly expanding the attack surface and potential damage scope.
Organizations affected by this vulnerability should prioritize immediate mitigation through patching the SOAPpy library to a version that properly validates and sanitizes XML input. The recommended remediation involves upgrading to a patched version of SOAPpy that implements proper XML parser configuration to disable external entity resolution or employs strict input validation mechanisms. Additionally, network segmentation and firewall rules should be implemented to restrict access to SOAP services from untrusted networks, while input validation should be strengthened at multiple layers including API gateways and application firewalls. Security monitoring should be enhanced to detect anomalous SOAP request patterns that might indicate XXE exploitation attempts, and regular security assessments should be conducted to identify other potential XXE vulnerabilities in legacy systems. Organizations should also consider implementing Web Application Firewalls (WAFs) with XXE detection capabilities as an additional protective measure, while ensuring that all XML processing components are configured with secure default settings that prevent unauthorized file access through external entity references.