CVE-2024-50317
📋 TL;DR
A null pointer dereference vulnerability in Ivanti Avalanche allows remote unauthenticated attackers to crash the service, causing denial of service. This affects all Ivanti Avalanche installations before version 6.4.6 that are exposed to network access.
💻 Affected Systems
- Ivanti Avalanche
📦 What is this software?
Avalanche by Ivanti
⚠️ Risk & Real-World Impact
Worst Case
Complete service outage of Ivanti Avalanche, disrupting mobile device management capabilities across the enterprise.
Likely Case
Service crashes requiring manual restart, causing temporary disruption to device management operations.
If Mitigated
Limited impact with proper network segmentation and monitoring allowing quick service restoration.
🎯 Exploit Status
Null pointer dereference vulnerabilities typically require minimal exploitation complexity when accessible remotely without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.4.6
Vendor Advisory: https://forums.ivanti.com/s/article/Security-Advisory-Ivanti-Avalanche-Multiple-CVEs-Q4-2024-Release
Restart Required: Yes
Instructions:
1. Download Ivanti Avalanche 6.4.6 from the Ivanti support portal. 2. Backup current configuration. 3. Run the installer to upgrade to version 6.4.6. 4. Restart the Avalanche service.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Ivanti Avalanche to trusted management networks only
Firewall Rules
allImplement firewall rules to block external access to Avalanche ports (typically 1777, 1778, 1779)
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure to trusted IP addresses only
- Deploy monitoring and alerting for Avalanche service crashes with automated restart capabilities
🔍 How to Verify
Check if Vulnerable:
Check the Avalanche version in the web interface under Help > About or via the Avalanche ConsoleCheck Version:
Not applicable - version check through GUI onlyVerify Fix Applied:
Verify version shows 6.4.6 or higher in the Avalanche interface📡 Detection & Monitoring
Log Indicators:
- Avalanche service crash events in Windows Event Logs
- Unexpected service termination logs in Avalanche logs
Network Indicators:
- Unusual traffic patterns to Avalanche ports from untrusted sources
- Multiple connection attempts followed by service unavailability
SIEM Query:
source="windows" AND event_id=7034 AND service_name="Avalanche" OR source="avalanche" AND message="crash" OR "terminated"