CVE-2024-25660
📋 TL;DR
CVE-2024-25660 allows low-privileged remote attackers to perform unauthorized file operations through the WebDAV service in Infinera TNMS due to excessive privileges. This affects organizations using Infinera Transcend Network Management System version 19.10.3 for optical network management.
💻 Affected Systems
- Infinera Transcend Network Management System (TNMS)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could modify critical system files, install backdoors, exfiltrate sensitive network configuration data, or disrupt network management operations.
Likely Case
Unauthorized file access leading to information disclosure, configuration tampering, or privilege escalation within the management system.
If Mitigated
Limited impact if proper network segmentation, access controls, and monitoring are implemented to restrict WebDAV service access.
🎯 Exploit Status
Exploitation requires low-privileged credentials but leverages excessive WebDAV service privileges.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in available references
Vendor Advisory: https://www.nokia.com/optical-networks/infinera/
Restart Required: No
Instructions:
1. Monitor vendor advisory for patch availability. 2. Apply vendor-provided patch when released. 3. Test in non-production environment first.
🔧 Temporary Workarounds
Disable WebDAV Service
allDisable the vulnerable WebDAV service if not required for operations.
Specific commands depend on TNMS implementation - consult vendor documentation
Restrict Network Access
allImplement firewall rules to restrict access to WebDAV service ports.
iptables -A INPUT -p tcp --dport [webdav_port] -j DROP
netsh advfirewall firewall add rule name="Block TNMS WebDAV" dir=in action=block protocol=TCP localport=[webdav_port]
🧯 If You Can't Patch
- Implement strict network segmentation to isolate TNMS systems from untrusted networks.
- Enforce principle of least privilege for all TNMS user accounts and monitor for unusual file operations.
🔍 How to Verify
Check if Vulnerable:
Check TNMS version via administrative interface or system logs for version 19.10.3.Check Version:
Specific command depends on TNMS implementation - consult vendor documentationVerify Fix Applied:
Verify WebDAV service is disabled or patched version is installed after remediation.📡 Detection & Monitoring
Log Indicators:
- Unusual file operations via WebDAV service
- Multiple failed authentication attempts followed by successful WebDAV access
- File modifications by low-privileged users
Network Indicators:
- Unexpected connections to WebDAV service ports
- Unusual file transfer patterns to/from TNMS system
SIEM Query:
source="tnms_logs" AND (event="webdav_file_operation" AND user_privilege="low")