CVE-2016-9563

What is this vulnerability?

CVE-2016-9563 is categorized as a medium XML External Entity (XXE) flaw with a CVSS base score of 6.5. Based on our vulnerability intelligence, this issue occurs when the application fails to securely handle untrusted data boundaries.

BC-BMT-BPM-DSK in SAP NetWeaver AS JAVA 7.5 allows remote authenticated users to conduct XML External Entity (XXE) attacks via the sap.comtcbpemhimuwlconnproviderweb/bpemuwlconn URI, aka SAP Security Note 2296909.

This architectural defect enables adversaries to bypass intended security controls, directly manipulating the application's execution state or data layer. Immediate strategic intervention is required.

Risk Assessment

Impact on Systems

✅ Data Exfiltration: Attackers can extract sensitive data from backend databases, configuration files, or internal services.

✅ Authentication Bypass: Exploiting this flaw may allow unauthorized access to protected resources and administrative interfaces.

✅ Lateral Movement: Once initial access is gained, attackers can pivot to internal systems and escalate privileges.

How to Fix and Mitigate CVE-2016-9563

1. Apply Vendor Patches Immediately: This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog. Apply updates per vendor instructions.
2. Verify Patch Deployment: Confirm all instances are updated using Precogs continuous monitoring.
3. Review Audit Logs: Investigate historical access logs for indicators of compromise related to this attack surface.
4. Implement Defense-in-Depth: Deploy WAF rules, network segmentation, and endpoint detection to limit blast radius.

Defending with Precogs AI

SAP NetWeaver AS Java contains a vulnerability (BC-BMT-BPM-DSK) that allows remote attackers to bypass authorization. Attackers exploit a missing access check to execute privileged workflow commands. Precogs API Security Engine identifies authorization bypass conditions within enterprise business logic.

Use Precogs to continuously scan your codebase, binaries, APIs, and infrastructure for this vulnerability class and related attack patterns. Our AI-powered detection engine combines static analysis with threat intelligence to identify exploitable weaknesses before attackers do.

Start scanning with Precogs →

Vulnerability Code Signature

Attack Data Flow

Vulnerable Code Pattern

// ❌ VULNERABLE: XXE Injection
public void parseXml(InputStream is) throws Exception {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    // Taint sink: default configuration allows external entities
    DocumentBuilder builder = factory.newDocumentBuilder();
    Document doc = builder.parse(is);
}

Secure Code Pattern

// ✅ SECURE: Safe XML Parsing
public void parseXml(InputStream is) throws Exception {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    // Sanitized configuration: disable external entities
    factory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
    DocumentBuilder builder = factory.newDocumentBuilder();
    Document doc = builder.parse(is);
}

How Precogs Detects This

Precogs AI Analysis Engine identifies unsafe XML parsing configurations and XXE injection weaknesses via inter-procedural taint tracking.\n