CVE-2024-4196
📋 TL;DR
An improper input validation vulnerability in Avaya IP Office's Web Control component allows remote attackers to execute arbitrary commands or code via specially crafted web requests. This affects all Avaya IP Office installations running versions prior to 11.1.3.1. Organizations using vulnerable versions should treat this as critical.
💻 Affected Systems
- Avaya IP Office
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to gain full control of the Avaya IP Office system, potentially leading to data exfiltration, lateral movement within the network, and persistent backdoor installation.
Likely Case
Remote code execution leading to service disruption, unauthorized access to telephony systems, and potential credential harvesting from the compromised system.
If Mitigated
Limited impact if proper network segmentation, web application firewalls, and intrusion detection systems are in place to block malicious requests.
🎯 Exploit Status
The vulnerability requires no authentication and involves sending specially crafted web requests, suggesting relatively straightforward exploitation once details are known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 11.1.3.1
Vendor Advisory: https://download.avaya.com/css/public/documents/101090768
Restart Required: Yes
Instructions:
1. Download Avaya IP Office version 11.1.3.1 or later from Avaya support portal. 2. Backup current configuration and data. 3. Apply the update following Avaya's upgrade procedures. 4. Restart the system as required. 5. Verify the update was successful.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict access to the Web Control interface to trusted IP addresses only
Configure firewall rules to allow only specific source IPs to access the Avaya IP Office web interface (typically port 80/443)
Disable Web Interface
allTemporarily disable the web management interface if not required
Access Avaya IP Office Manager > System > Telephony > IP Office Web Management > Disable
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Avaya IP Office systems from critical network segments
- Deploy a web application firewall (WAF) in front of the Avaya IP Office with rules to detect and block malicious web requests
🔍 How to Verify
Check if Vulnerable:
Check the Avaya IP Office version via the web interface (System Status > Version) or command line. If version is below 11.1.3.1, the system is vulnerable.Check Version:
From Avaya IP Office Manager: System > Status > Version, or via SSH: show versionVerify Fix Applied:
After patching, verify the version shows 11.1.3.1 or higher in the System Status page. Test web interface functionality to ensure it's working properly.📡 Detection & Monitoring
Log Indicators:
- Unusual web requests to Web Control component
- Multiple failed authentication attempts followed by successful access
- Commands executed via web interface from unusual IP addresses
Network Indicators:
- Unusual outbound connections from Avaya IP Office system
- HTTP requests with unusual parameters or payloads to the web interface
SIEM Query:
source="avaya-ip-office" AND (url="*WebControl*" OR url="*webcontrol*") AND (status=200 OR status=302) AND (user_agent="*curl*" OR user_agent="*wget*" OR user_agent="*python*" OR user_agent="*nmap*")