CVE-2014-8152 in XML Security
Summary
by MITRE
Apache Santuario XML Security for Java 2.0.x before 2.0.3 allows remote attackers to bypass the streaming XML signature protection mechanism via a crafted XML document.
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Analysis
by VulDB Data Team • 04/11/2022
The vulnerability identified as CVE-2014-8152 affects Apache Santuario XML Security for Java versions 2.0.x prior to 2.0.3, representing a critical flaw in the library's handling of streaming XML signatures. This security issue stems from improper validation of XML documents during the streaming processing phase, which allows malicious actors to craft specially formatted XML content that circumvents the intended security protections. The vulnerability specifically targets the XML signature validation mechanism that is designed to prevent unauthorized modifications to XML documents during processing. When the library processes XML documents in streaming mode, it fails to adequately verify the integrity of the signature structure, enabling attackers to manipulate the document flow in ways that bypass the security checks.
The technical implementation of this vulnerability resides in the XML signature validation logic within the streaming processing pipeline of Apache Santuario. The flaw occurs when the library encounters XML documents that contain maliciously constructed signature elements or improper namespace declarations that confuse the validation process. This particular vulnerability falls under CWE-295, which addresses improper certificate validation, and relates to CWE-347, concerning improper verification of cryptographic signatures. The attack vector involves sending a crafted XML document that exploits the library's insufficient input sanitization during streaming operations, allowing the malicious content to pass through the signature validation without detection. The vulnerability demonstrates a weakness in the library's ability to maintain consistent security policies across different processing modes, particularly when transitioning from standard to streaming XML processing.
The operational impact of CVE-2014-8152 extends beyond simple data integrity concerns, as it potentially enables attackers to perform signature forgery operations against XML documents that are processed through affected systems. This vulnerability could be exploited in scenarios where XML signatures are used to authenticate and validate document integrity in enterprise applications, financial transactions, or secure communications. The bypass of streaming XML signature protection mechanisms means that attackers could manipulate signed documents without detection, undermining the fundamental security assumptions of XML signature validation. Systems that rely on Apache Santuario for XML security operations may experience unauthorized modifications to critical data, potentially leading to data breaches, financial loss, or compromise of sensitive information. The vulnerability affects not only direct users of the library but also applications that depend on it for secure XML processing, creating a cascading security risk across interconnected systems.
Organizations affected by this vulnerability should immediately upgrade to Apache Santuario XML Security for Java version 2.0.3 or later, which contains the necessary patches to address the streaming signature validation flaw. The remediation process should include comprehensive testing of all XML processing workflows to ensure that the upgrade does not introduce compatibility issues with existing applications. Security teams should also implement monitoring mechanisms to detect potential exploitation attempts and consider deploying additional validation layers for XML content that passes through affected systems. This vulnerability aligns with ATT&CK technique T1556.002, which covers credential access through XML external entity processing, and demonstrates the importance of maintaining proper XML security controls in enterprise environments. Organizations should also review their XML processing configurations and ensure that all XML signature validation occurs consistently regardless of the processing mode used, as the vulnerability specifically exploits the differences between standard and streaming processing behaviors.