CVE-2023-46263
📋 TL;DR
This vulnerability allows attackers to upload malicious files to Avalanche systems, leading to remote code execution. It affects Avalanche versions 6.4.1 and below, putting organizations using this enterprise mobility management platform at risk of complete system compromise.
💻 Affected Systems
- Wavelink Avalanche
📦 What is this software?
Avalanche by Ivanti
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining administrative control, data exfiltration, ransomware deployment, and lateral movement across the network.
Likely Case
Attackers upload web shells or malware to execute arbitrary commands, steal credentials, and maintain persistent access to the system.
If Mitigated
Limited impact with proper file upload restrictions and network segmentation preventing lateral movement.
🎯 Exploit Status
Unrestricted file upload vulnerabilities are commonly weaponized. No authentication required makes exploitation straightforward.
🛠️ 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 Avalanche 6.4.2 from Wavelink support portal. 2. Backup current configuration and database. 3. Run the installer to upgrade. 4. Restart the Avalanche service. 5. Verify version shows 6.4.2.
🔧 Temporary Workarounds
File Upload Restriction
allImplement web application firewall rules to block dangerous file uploads
WAF specific - configure rules to block .jsp, .php, .asp, .aspx, .exe, .dll uploads
Network Segmentation
allIsolate Avalanche server from critical network segments
Firewall rules to restrict Avalanche server network access
🧯 If You Can't Patch
- Implement strict file upload validation at the application layer
- Deploy network-based intrusion prevention systems to detect exploit attempts
🔍 How to Verify
Check if Vulnerable:
Check Avalanche version in web interface or installation directory. Versions 6.4.1 or below are vulnerable.Check Version:
Check web interface or installation directory for version.txt fileVerify Fix Applied:
Confirm version shows 6.4.2 in Avalanche web interface or via version check command.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to Avalanche upload directories
- Execution of unexpected processes from Avalanche directories
Network Indicators:
- HTTP POST requests with file uploads to Avalanche endpoints
- Outbound connections from Avalanche server to unknown IPs
SIEM Query:
source="avalanche" AND (event="file_upload" OR event="process_execution")