CVE-2023-46257
📋 TL;DR
This critical vulnerability in Mobile Device Server allows remote attackers to send specially crafted packets that cause memory corruption, potentially leading to denial of service or remote code execution. Systems running vulnerable versions of the affected software are at risk, particularly those exposed to untrusted networks.
💻 Affected Systems
- Wavelink Avalanche Mobile Device Server
📦 What is this software?
Avalanche by Ivanti
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with full system compromise, allowing attacker to install malware, steal data, or pivot to other systems.
Likely Case
Denial of service causing Mobile Device Server to crash, disrupting mobile device management operations.
If Mitigated
Limited impact with proper network segmentation and access controls preventing exploitation attempts.
🎯 Exploit Status
CWE-787 (Out-of-bounds Write) suggests relatively straightforward exploitation once packet format is understood.
🛠️ 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. 3. Run installer to upgrade. 4. Restart Mobile Device Server service.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Mobile Device Server to only trusted management networks
Use firewall rules to block untrusted access to Mobile Device Server ports
Disable Unnecessary Features
allDisable Mobile Device Server if not required for operations
Stop Mobile Device Server service if not essential
🧯 If You Can't Patch
- Implement strict network access controls and firewall rules to limit exposure
- Monitor for unusual network traffic patterns and failed connection attempts
🔍 How to Verify
Check if Vulnerable:
Check Avalanche version in administration console or via 'avalanche --version' commandCheck Version:
avalanche --versionVerify Fix Applied:
Confirm version is 6.4.2 or later in administration console📡 Detection & Monitoring
Log Indicators:
- Mobile Device Server crash logs
- Memory access violation errors
- Unusual packet size or format in server logs
Network Indicators:
- Unusual traffic patterns to Mobile Device Server port
- Malformed packets detected by IDS/IPS
SIEM Query:
source="avalanche" AND (error="memory" OR error="corruption" OR error="crash")