CVE-2023-46259
📋 TL;DR
CVE-2023-46259 is a critical memory corruption vulnerability in the Mobile Device Server component of Ivanti Avalanche. Attackers can send specially crafted packets to trigger memory corruption, potentially leading to remote code execution or denial of service. Organizations using Ivanti Avalanche for mobile device management are affected.
💻 Affected Systems
- Ivanti Avalanche
📦 What is this software?
Avalanche by Ivanti
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with SYSTEM/root privileges, allowing complete compromise of the Mobile Device Server and potentially lateral movement within the network.
Likely Case
Denial of service causing the Mobile Device Server to crash, disrupting mobile device management capabilities.
If Mitigated
Limited to denial of service if exploit attempts are blocked by network controls or the server restarts automatically.
🎯 Exploit Status
The vulnerability requires sending specially crafted packets to the Mobile Device Server port, which is typically accessible without authentication.
🛠️ 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 the official Ivanti portal. 2. Backup current configuration and databases. 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 the Mobile Device Server port (typically TCP 1777) to only trusted management systems.
Firewall Blocking
allBlock incoming traffic to the Mobile Device Server port from untrusted networks.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate the Mobile Device Server from untrusted networks.
- Deploy intrusion detection/prevention systems to monitor for exploit attempts against the Mobile Device Server port.
🔍 How to Verify
Check if Vulnerable:
Check the Avalanche version in the administration console under Help > About. If version is below 6.4.2, the system is vulnerable.Check Version:
In Avalanche console: Help > About, or check Windows Services for Avalanche Mobile Device Server version properties.Verify Fix Applied:
After patching, verify the version shows 6.4.2 or higher in the administration console and ensure the Mobile Device Server service is running normally.📡 Detection & Monitoring
Log Indicators:
- Multiple connection attempts to Mobile Device Server port (1777) from single source
- Avalanche service crash logs in Windows Event Viewer
- Unusual packet patterns in network logs
Network Indicators:
- Unusual traffic patterns to port 1777
- Malformed packets targeting the Mobile Device Server
SIEM Query:
source="windows" AND (event_id=7034 OR event_id=1000) AND process_name="AvalancheMobileDeviceServer.exe" OR destination_port=1777 AND packet_size>normal_threshold