CVE-2017-10670 in OSCI Transport Library
Summary
by MITRE
An XML External Entity (XXE) issue exists in OSCI-Transport 1.2 as used in OSCI Transport Library 1.6.1 (Java) and OSCI Transport Library 1.6 (.NET), exploitable by sending a crafted standard-conforming OSCI message from within the infrastructure.
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Analysis
by VulDB Data Team • 10/21/2019
The vulnerability identified as CVE-2017-10670 represents a critical XML External Entity (XXE) flaw within the OSCI-Transport library implementations for both Java and .NET platforms. This issue manifests in versions 1.6.1 and 1.6 respectively, affecting the OSCI Transport Library ecosystem. The vulnerability stems from insufficient input validation and sanitization of XML content within the OSCI message processing framework, creating a pathway for malicious actors to exploit the system through crafted XML payloads.
The technical exploitation of this XXE vulnerability occurs when the OSCI-Transport library processes standard-conforming OSCI messages that contain malicious XML entities. The flaw allows an attacker to inject external entity references within XML documents that are processed by the library, potentially enabling unauthorized access to internal system resources. This vulnerability falls under CWE-611, which specifically addresses Improper Restriction of XML External Entity Reference, and aligns with ATT&CK technique T1213.002 for Data from Information Repositories. The attack vector is particularly concerning as it can be executed from within the trusted infrastructure, making it difficult to detect and prevent through traditional network-based security measures.
The operational impact of this vulnerability extends beyond simple data exposure, as it could potentially enable remote code execution or denial of service conditions depending on the system configuration. An attacker could leverage this vulnerability to access internal network resources, perform server-side request forgery attacks, or extract sensitive information from the system. The fact that this vulnerability exists within a transport library suggests that it could affect multiple applications and services that rely on OSCI messaging protocols, potentially creating a widespread impact across interconnected systems. The vulnerability's exploitation requires minimal privileges since it operates within the infrastructure context, making it particularly dangerous for enterprise environments where internal trust models are commonly assumed.
Mitigation strategies for CVE-2017-10670 should focus on implementing proper XML parser configurations that disable external entity resolution and DTD processing. Organizations should upgrade to patched versions of the OSCI Transport Library where available, or implement application-level safeguards such as XML schema validation, input sanitization, and strict content type controls. Network segmentation and monitoring should be enhanced to detect anomalous XML processing patterns that might indicate exploitation attempts. The implementation of web application firewalls and XML security gateways can provide additional layers of protection. Security teams should also conduct comprehensive vulnerability assessments to identify all systems utilizing affected OSCI Transport Library versions and ensure proper patch management procedures are in place to prevent similar XXE vulnerabilities in other components of the infrastructure stack.