CVE-2025-27022
📋 TL;DR
A path traversal vulnerability in Infinera G42's WebGUI HTTP endpoint allows authenticated remote users to download any readable files from the operating system. This affects Infinera G42 version R6.1.3 installations with the WebGUI exposed.
💻 Affected Systems
- Infinera G42
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could exfiltrate sensitive system files, configuration files, credentials, or proprietary data, potentially leading to complete system compromise.
Likely Case
Authenticated users (including compromised accounts) accessing sensitive configuration files, logs, or system information they shouldn't have access to.
If Mitigated
Limited impact with proper network segmentation, strong authentication controls, and file system permissions restricting the httpd service account.
🎯 Exploit Status
Exploitation requires authenticated access but is technically simple once authentication is obtained. Path traversal vulnerabilities typically involve manipulating file paths in HTTP requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in available references
Vendor Advisory: Not provided in CVE references
Restart Required: No
Instructions:
1. Check Infinera's official security advisories for patch availability. 2. If patch exists, download and apply according to vendor instructions. 3. Verify the fix by testing the WebGUI endpoint.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to the WebGUI HTTP endpoint to only trusted IP addresses or networks.
Use firewall rules to limit access: iptables -A INPUT -p tcp --dport [WEBGUI_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [WEBGUI_PORT] -j DROP
WebGUI Disablement
allDisable the WebGUI HTTP endpoint if not required for operations.
Consult Infinera documentation for disabling WebGUI service
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Infinera G42 devices from untrusted networks
- Enforce strong authentication policies and monitor for suspicious authentication attempts
🔍 How to Verify
Check if Vulnerable:
Test authenticated access to WebGUI endpoint with path traversal payloads (e.g., attempt to access /etc/passwd via manipulated URL parameters).Check Version:
Check device version via WebGUI interface or CLI: show version (consult Infinera documentation for exact command)Verify Fix Applied:
After applying vendor patch or workarounds, retest path traversal attempts to confirm they are blocked.📡 Detection & Monitoring
Log Indicators:
- HTTP requests with unusual file paths or directory traversal patterns (../, ..\) in WebGUI logs
- Multiple failed authentication attempts followed by successful login and file access patterns
Network Indicators:
- Unusual outbound data transfers from the Infinera device following WebGUI access
- HTTP requests containing path traversal sequences to the WebGUI port
SIEM Query:
source="webgui_logs" AND (url="*../*" OR url="*..\*" OR url="*/etc/*" OR url="*/proc/*")