CVE-2018-18815
📋 TL;DR
This vulnerability allows unauthenticated attackers to bypass authorization checks in TIBCO JasperReports Server's REST API, potentially accessing sensitive data and functionality. Affected systems include multiple TIBCO JasperReports products up to version 7.1.0.
💻 Affected Systems
- TIBCO JasperReports Server
- TIBCO JasperReports Server Community Edition
- TIBCO JasperReports Server for ActiveMatrix BPM
- TIBCO Jaspersoft for AWS with Multi-Tenancy
- TIBCO Jaspersoft Reporting and Analytics for AWS
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing unauthorized access to all reports, data sources, and administrative functions, potentially leading to data exfiltration or system takeover.
Likely Case
Unauthorized access to sensitive business reports, confidential data, and system configuration information.
If Mitigated
Limited impact if proper network segmentation and access controls are in place, though authorization bypass remains possible.
🎯 Exploit Status
Theoretical vulnerability with CVSS 10.0 score suggests trivial exploitation. No public exploit code identified, but authorization bypass vulnerabilities are commonly weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 6.4.3 and 7.1.0 - consult vendor advisory for specific patched versions
Vendor Advisory: https://www.tibco.com/support/advisories/2019/03/tibco-security-advisory-march-6-2019-tibco-jasperreports-server-2018-18815
Restart Required: Yes
Instructions:
1. Review vendor advisory for specific patched versions. 2. Apply vendor-provided patches or upgrade to fixed versions. 3. Restart JasperReports Server services. 4. Verify the fix by testing authorization controls.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to JasperReports Server to only trusted IP addresses and networks
Use firewall rules to limit access: iptables -A INPUT -p tcp --dport 8080 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP
Reverse Proxy with Authentication
allPlace JasperReports Server behind a reverse proxy that enforces authentication before requests reach the vulnerable REST API
Configure Apache/Nginx with authentication: auth_basic 'Restricted'; auth_basic_user_file /path/to/.htpasswd;
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to limit access to only necessary users
- Deploy a web application firewall (WAF) with rules to detect and block authorization bypass attempts
🔍 How to Verify
Check if Vulnerable:
Check JasperReports Server version against affected versions list. Attempt to access REST API endpoints without authentication to test authorization controls.Check Version:
Check JasperReports Server web interface or configuration files for version information. Typically visible in admin console or /jasperserver/login.htmlVerify Fix Applied:
After patching, attempt to access protected REST API endpoints without authentication - should receive proper authorization errors. Verify version is updated beyond affected versions.📡 Detection & Monitoring
Log Indicators:
- Unauthenticated access attempts to REST API endpoints
- Access to protected resources from unauthenticated IP addresses
- Unusual access patterns to /rest_v2/ endpoints
Network Indicators:
- HTTP requests to JasperReports REST API without authentication headers
- Unusual traffic patterns to JasperReports Server port (typically 8080)
SIEM Query:
source="jasperreports.log" AND (http_method="GET" OR http_method="POST") AND uri_path="/rest_v2/*" AND user="anonymous"🔗 References
- http://www.securityfocus.com/bid/107346
- http://www.tibco.com/services/support/advisories
- https://www.tibco.com/support/advisories/2019/03/tibco-security-advisory-march-6-2019-tibco-jasperreports-library-2018-18809
- https://www.tibco.com/support/advisories/2019/03/tibco-security-advisory-march-6-2019-tibco-jasperreports-server-2018-18815
- https://www.zerodayinitiative.com/advisories/ZDI-19-305/
- http://www.securityfocus.com/bid/107346
- http://www.tibco.com/services/support/advisories
- https://www.tibco.com/support/advisories/2019/03/tibco-security-advisory-march-6-2019-tibco-jasperreports-library-2018-18809
- https://www.tibco.com/support/advisories/2019/03/tibco-security-advisory-march-6-2019-tibco-jasperreports-server-2018-18815
- https://www.zerodayinitiative.com/advisories/ZDI-19-305/
