CVE-2019-0283 in NetWeaver Process Integration
Summary
by MITRE
SAP NetWeaver Process Integration (Adapter Engine), fixed in versions 7.10 to 7.11, 7.30, 7.31, 7.40, 7.50; is vulnerable to Digital Signature Spoofing. It is possible to spoof XML signatures and send arbitrary requests to the server via PI Axis adapter. These requests will be accepted by the PI Axis adapter even if the payload has been altered, especially when the signed element is the body of the xml document.
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Analysis
by VulDB Data Team • 05/28/2020
SAP NetWeaver Process Integration presents a critical digital signature spoofing vulnerability that undermines the integrity of XML-based communications within enterprise integration environments. This vulnerability affects multiple versions of the Adapter Engine component, specifically those ranging from 7.10 through 7.11, 7.30, 7.31, 7.40, and 7.50, creating a widespread security risk across numerous organizational deployments. The flaw resides in the improper validation of XML signatures within the PI Axis adapter, which allows malicious actors to manipulate signed XML documents without detection. The vulnerability specifically targets scenarios where the XML signature covers the document body, making it particularly dangerous for enterprise integration workflows that rely on signed messages for authentication and integrity verification.
The technical exploitation of this vulnerability occurs through manipulation of XML signature structures that are processed by the PI Axis adapter. When an XML document contains a signature that covers the body element, the system fails to properly validate that the signed content matches the actual payload being processed. This weakness enables attackers to alter the message content while maintaining a valid signature, effectively bypassing security controls designed to prevent unauthorized modifications. The vulnerability stems from inadequate cryptographic validation mechanisms that do not properly verify the integrity of the entire message structure, particularly when the signature scope includes the document body rather than just specific elements or headers.
The operational impact of this vulnerability extends beyond simple message tampering, as it fundamentally compromises the trust model within SAP NetWeaver Process Integration environments. Organizations relying on signed messages for secure communication between systems become vulnerable to man-in-the-middle attacks where malicious actors can inject unauthorized commands or data into integration workflows. The implications are severe for enterprise environments where integration points serve as critical pathways for business-critical data exchange, potentially allowing attackers to execute unauthorized processes, access sensitive information, or disrupt business operations through manipulated integration messages. This vulnerability particularly affects scenarios involving secure web services, enterprise application integration, and cross-system data exchange where XML signatures are used to ensure message integrity.
Organizations should implement immediate mitigations including applying the vendor-provided patches for affected SAP NetWeaver Process Integration versions, implementing additional validation layers beyond the default XML signature verification, and monitoring integration logs for suspicious activity patterns. The vulnerability aligns with CWE-347, which addresses improper validation of cryptographic signatures, and maps to ATT&CK technique T1556.001 for credential harvesting through manipulation of signed communications. Security teams should also consider implementing network segmentation to limit access to integration points, deploying additional message inspection tools, and establishing enhanced monitoring for signature validation failures. The remediation process requires careful coordination between security operations and integration teams to ensure that patching activities do not disrupt critical business processes while maintaining the integrity of the integration infrastructure.
This vulnerability demonstrates the critical importance of proper cryptographic implementation in enterprise integration platforms and highlights the risks associated with insufficient signature validation mechanisms. The attack vector represents a sophisticated bypass of security controls that can have cascading effects throughout integrated enterprise systems, making it essential for organizations to conduct comprehensive security assessments of their integration environments. The vulnerability also underscores the need for continuous security monitoring and validation of cryptographic implementations within complex enterprise integration architectures where multiple systems interact through standardized protocols and message formats.