CVE-2024-13110
📋 TL;DR
This vulnerability in Beijing Yunfan Internet Technology's Yunfan Learning Examination System 1.9.2 allows remote attackers to access sensitive information through the Exam Answer Handler component. The information disclosure vulnerability affects systems running the vulnerable version of the software, potentially exposing exam data or system information.
💻 Affected Systems
- Beijing Yunfan Internet Technology Yunfan Learning Examination System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access sensitive exam answers, student data, or system configuration information, potentially leading to academic integrity breaches or further system compromise.
Likely Case
Unauthorized access to exam-related information or system metadata that could be used for reconnaissance or planning additional attacks.
If Mitigated
Limited exposure of non-critical system information with proper access controls and network segmentation in place.
🎯 Exploit Status
The exploit has been publicly disclosed on GitHub and can be launched remotely without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Monitor vendor channels for updates. Consider upgrading to a newer version if available.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to the examination system to trusted IP addresses only
Use firewall rules to limit access: iptables -A INPUT -p tcp --dport [PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [PORT] -j DROP
Application Firewall Rules
allImplement WAF rules to block suspicious requests to the PaperController endpoint
Add WAF rule: deny requests containing suspicious patterns to /paper/* endpoints
🧯 If You Can't Patch
- Implement strict network segmentation to isolate the examination system from untrusted networks
- Enable detailed logging and monitoring for suspicious access patterns to PaperController endpoints
🔍 How to Verify
Check if Vulnerable:
Check if running Yunfan Learning Examination System version 1.9.2. Review application logs for unauthorized access to PaperController endpoints.Check Version:
Check application configuration files or admin panel for version informationVerify Fix Applied:
Test if information disclosure no longer occurs when accessing PaperController endpoints. Verify system is upgraded to a newer version.📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to /paper/* endpoints
- Requests to PaperController.java functions from unexpected sources
- Information disclosure in response logs
Network Indicators:
- Unusual traffic to examination system ports from external IPs
- Patterns of reconnaissance activity
SIEM Query:
source="web_logs" AND (uri="/paper/*" OR uri="/PaperController") AND (status=200 OR status=500) AND src_ip NOT IN [trusted_ips]