CVE-2023-32566
📋 TL;DR
CVE-2023-32566 is a vulnerability in Ivanti Avalanche that allows attackers to send specially crafted requests leading to sensitive data leakage or resource-based denial-of-service attacks. This affects organizations using Ivanti Avalanche for mobile device management. The vulnerability is fixed in version 6.4.1.
💻 Affected Systems
- Ivanti Avalanche
📦 What is this software?
Avalanche by Ivanti
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through data exfiltration of sensitive mobile device management data, credentials, and configuration files, followed by resource exhaustion causing service disruption.
Likely Case
Partial data leakage of configuration information and potential service degradation through resource consumption attacks.
If Mitigated
Limited impact with proper network segmentation and access controls, potentially only affecting isolated components.
🎯 Exploit Status
The vulnerability requires sending specially crafted requests but does not require authentication, making exploitation relatively straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.4.1
Vendor Advisory: https://forums.ivanti.com/s/article/Avalanche-Vulnerabilities-Addressed-in-6-4-1?language=en_US
Restart Required: Yes
Instructions:
1. Download Ivanti Avalanche 6.4.1 from the Ivanti support portal. 2. Backup current configuration and database. 3. Run the installer to upgrade to version 6.4.1. 4. Restart the Avalanche server and verify functionality.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Avalanche server to only trusted IP addresses and networks.
Web Application Firewall Rules
allImplement WAF rules to block suspicious request patterns targeting the Avalanche web interface.
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure to trusted sources only.
- Monitor system logs for unusual request patterns and resource consumption spikes.
🔍 How to Verify
Check if Vulnerable:
Check the Avalanche server version in the web interface under Help > About or via the server console.Check Version:
Not applicable - use web interface or server console for version check.Verify Fix Applied:
Confirm version is 6.4.1 or higher in the Avalanche interface and test normal functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP request patterns to Avalanche endpoints
- Increased memory or CPU usage on Avalanche server
- Error logs showing malformed requests
Network Indicators:
- Unusual traffic spikes to Avalanche server ports (typically 8080, 8443)
- Requests with abnormal parameters or headers
SIEM Query:
source="avalanche_logs" AND (http_status=400 OR http_status=500) AND request_size>threshold