CVE-2024-47224
📋 TL;DR
A CRLF injection vulnerability in Mitel MiCollab AWV component allows unauthenticated attackers to manipulate URLs to conduct phishing attacks. This affects MiCollab versions through 9.8 SP1 FP2 (9.8.1.201). Organizations using vulnerable Mitel conferencing systems are at risk.
💻 Affected Systems
- Mitel MiCollab
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Successful phishing campaigns leading to credential theft, session hijacking, or malware distribution to users who click manipulated links.
Likely Case
Phishing attacks targeting users of the conferencing system, potentially compromising organizational credentials.
If Mitigated
Limited impact if users are trained to recognize suspicious URLs and email filtering blocks malicious messages.
🎯 Exploit Status
CRLF injection vulnerabilities are typically straightforward to exploit once the injection point is identified. No authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to version beyond 9.8.1.201 as specified in vendor advisory
Vendor Advisory: https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-misa-2024-0025
Restart Required: Yes
Instructions:
1. Review Mitel advisory MISA-2024-0025. 2. Download and apply the latest MiCollab update from Mitel support. 3. Restart MiCollab services. 4. Verify the update was successful.
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement additional URL validation and sanitization at network perimeter or reverse proxy
Access Restriction
allRestrict external access to MiCollab AWV component if not required for external users
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to detect and block CRLF injection attempts
- Monitor for suspicious URL patterns and user reports of phishing attempts related to conferencing links
🔍 How to Verify
Check if Vulnerable:
Check MiCollab version in administration interface. If version is 9.8.1.201 or earlier, system is vulnerable.Check Version:
Check via MiCollab web admin interface or consult system documentation for version commandVerify Fix Applied:
Verify version is updated beyond 9.8.1.201 and test URL handling for CRLF injection attempts.📡 Detection & Monitoring
Log Indicators:
- Unusual URL patterns with CRLF characters (%0D%0A, %0A, %0D) in web server logs
- Multiple failed authentication attempts following suspicious URL access
Network Indicators:
- HTTP requests containing CRLF sequences in URLs to MiCollab endpoints
- Unusual redirect patterns from MiCollab URLs
SIEM Query:
source="*MiCollab*" AND (url="*%0D%0A*" OR url="*%0A*" OR url="*%0D*")