CVE-2023-46803
📋 TL;DR
This vulnerability allows attackers to send specially crafted data packets to the Mobile Device Server, causing memory corruption that can lead to Denial of Service (DoS). Organizations using Ivanti Avalanche Mobile Device Management systems are affected. The attack requires network access to the vulnerable server.
💻 Affected Systems
- Ivanti Avalanche
📦 What is this software?
Avalanche by Ivanti
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption of the Mobile Device Server, preventing mobile device management operations and potentially affecting connected mobile devices.
Likely Case
Service interruption of the Mobile Device Server component, requiring restart and causing temporary loss of mobile device management capabilities.
If Mitigated
Limited impact with proper network segmentation and monitoring, potentially only affecting isolated test environments.
🎯 Exploit Status
Exploitation requires crafting specific data packets but does not require authentication. No public exploit code has been observed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.4.2
Vendor Advisory: https://download.wavelink.com/Files/avalanche_v6.4.2_release_notes.txt
Restart Required: Yes
Instructions:
1. Download Ivanti Avalanche version 6.4.2 from official sources. 2. Backup current configuration and data. 3. Run the installer to upgrade to version 6.4.2. 4. Restart the Mobile Device Server service.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Mobile Device Server to only trusted management networks
Firewall Rules
allImplement firewall rules to block unnecessary traffic to Mobile Device Server ports
🧯 If You Can't Patch
- Implement strict network access controls to limit who can communicate with the Mobile Device Server
- Deploy network monitoring and intrusion detection systems to detect anomalous packet patterns
🔍 How to Verify
Check if Vulnerable:
Check Ivanti Avalanche version in administration console or via Windows Programs and Features. Versions below 6.4.2 are vulnerable.Check Version:
Check via Ivanti Avalanche web interface or Windows Control Panel > Programs and FeaturesVerify Fix Applied:
Verify version shows 6.4.2 or higher in administration console and test Mobile Device Server functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual packet size or format in server logs
- Mobile Device Server service crashes or restarts
- Memory allocation errors in application logs
Network Indicators:
- Unusual traffic patterns to Mobile Device Server port
- Malformed packets targeting the server
SIEM Query:
source="avalanche_logs" AND (event="crash" OR event="memory_error" OR event="service_restart")