CVE-2012-5769 in SPSS Modeler
Summary
by MITRE
IBM SPSS Modeler 14.0, 14.1, 14.2 through FP3, and 15.0 before FP2 allows remote attackers to read arbitrary files, and possibly send HTTP requests to intranet servers or cause a denial of service (CPU and memory consumption), via an XML external entity declaration in conjunction with an entity reference.
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Analysis
by VulDB Data Team • 02/07/2018
The vulnerability identified as CVE-2012-5769 affects IBM SPSS Modeler versions 14.0 through 14.2 FP3 and 15.0 before FP2, representing a critical security flaw that enables remote attackers to exploit XML external entity processing mechanisms. This vulnerability specifically targets the application's handling of XML data structures, where the software fails to properly validate and sanitize external entity declarations. The flaw exists within the XML parser implementation that processes input files and data streams, creating an opportunity for malicious actors to manipulate the parsing process through crafted XML content. The vulnerability is categorized under CWE-611, which addresses Improper Restriction of XML External Entity Reference, a well-documented weakness in XML processing systems that has been exploited across numerous applications and platforms.
The technical exploitation of this vulnerability involves crafting malicious XML content containing external entity declarations that reference arbitrary files on the system or network resources. When the vulnerable SPSS Modeler application processes such XML input, it attempts to resolve these external entities, potentially leading to unauthorized file access, information disclosure, and in some cases, the ability to send HTTP requests to internal network services. The attack vector leverages the standard XML processing behavior where external entities are resolved by default, but the application fails to implement proper restrictions or validation mechanisms. This allows attackers to reference local files that should remain protected, potentially exposing sensitive data, configuration files, or system information through the XML parsing process.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can enable more sophisticated attacks including internal network reconnaissance and potential denial of service conditions. Attackers can craft XML payloads that cause excessive CPU and memory consumption during entity resolution, leading to resource exhaustion and system instability. The vulnerability's ability to send HTTP requests to intranet servers represents a particular concern as it can facilitate lateral movement within network environments, potentially allowing attackers to probe internal services, gather additional information, or even establish command and control channels. This capability aligns with attack patterns described in the MITRE ATT&CK framework under T1071.004 for Application Layer Protocol: DNS and T1018 for Remote System Discovery, demonstrating how this vulnerability can serve as a foundation for broader attack campaigns.
Organizations using affected IBM SPSS Modeler versions should implement immediate mitigations including applying the vendor-provided security patches and updates, configuring proper XML parser restrictions to disable external entity resolution, and implementing network segmentation to limit access to affected systems. Additional defensive measures include monitoring for unusual XML processing patterns, implementing input validation controls, and conducting security assessments to identify any potential exploitation attempts. The vulnerability highlights the importance of proper XML processing security measures and demonstrates how seemingly simple parsing functionality can become a critical attack surface when proper validation and restriction mechanisms are not implemented. Security teams should also consider implementing network-based intrusion detection systems to monitor for patterns consistent with XML external entity exploitation attempts.