CVE-2025-62397
📋 TL;DR
This vulnerability allows attackers to enumerate valid course IDs on a router by observing inconsistent responses to invalid IDs. This information disclosure could aid reconnaissance for further attacks. Organizations using affected router software are potentially impacted.
💻 Affected Systems
- Router software with course management functionality
📦 What is this software?
Moodle by Moodle
⚠️ Risk & Real-World Impact
Worst Case
Attackers could map all valid course IDs, then use this information to target specific courses with follow-up attacks like brute force or privilege escalation.
Likely Case
Attackers gather intelligence about course structure and existence, potentially identifying high-value targets for future exploitation.
If Mitigated
Limited to information disclosure only, with no direct access to course content or system compromise.
🎯 Exploit Status
Requires ability to send requests to router and analyze response patterns
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Red Hat advisory for specific fixed versions
Vendor Advisory: https://access.redhat.com/security/cve/CVE-2025-62397
Restart Required: No
Instructions:
1. Check Red Hat advisory for affected packages. 2. Update to patched version via yum update. 3. Verify patch application.
🔧 Temporary Workarounds
Implement consistent error responses
allConfigure router to return identical responses for all invalid course IDs
Configuration depends on specific router software
🧯 If You Can't Patch
- Implement network segmentation to restrict access to router management interface
- Monitor for unusual patterns of course ID requests in logs
🔍 How to Verify
Check if Vulnerable:
Test with invalid course IDs and observe if responses differ from valid ID responsesCheck Version:
rpm -q [affected-package-name]Verify Fix Applied:
After patching, test that all invalid course IDs return identical error responses📡 Detection & Monitoring
Log Indicators:
- Multiple sequential requests to different course IDs
- Patterns of 404 vs other error responses
Network Indicators:
- Unusual volume of requests to course endpoints
- Sequential ID probing patterns
SIEM Query:
source="router_logs" AND (url="*/course/*" OR url="*/courses/*") | stats count by src_ip, url