CVE-2024-49595
📋 TL;DR
Dell Wyse Management Suite versions 4.4 and earlier contain an authentication bypass vulnerability where attackers can replay captured authentication data. This allows high-privileged remote attackers to bypass authentication mechanisms, potentially causing denial of service. Organizations using affected versions of Dell Wyse Management Suite are vulnerable.
💻 Affected Systems
- Dell Wyse Management Suite
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain unauthorized administrative access to Wyse Management Suite, potentially disrupting management of all connected thin clients and causing widespread service outages.
Likely Case
Attackers bypass authentication to access administrative functions, leading to denial of service for managed thin clients or unauthorized configuration changes.
If Mitigated
With proper network segmentation and access controls, impact is limited to the management system itself without affecting managed endpoints.
🎯 Exploit Status
Exploitation requires capturing authentication traffic and replaying it, which typically requires network access to the management interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.5 or later
Vendor Advisory: https://www.dell.com/support/kbdoc/en-us/000244453/dsa-2024-440
Restart Required: Yes
Instructions:
1. Download Dell Wyse Management Suite 4.5 or later from Dell Support. 2. Backup current configuration. 3. Install the update following Dell's upgrade documentation. 4. Restart the Wyse Management Suite services.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Wyse Management Suite to only trusted administrative networks
Access Control Lists
allImplement strict firewall rules limiting connections to the management interface
🧯 If You Can't Patch
- Implement network segmentation to isolate Wyse Management Suite from untrusted networks
- Enable detailed authentication logging and monitor for unusual authentication patterns
🔍 How to Verify
Check if Vulnerable:
Check Wyse Management Suite version in the web interface under Help > About or via the installed program versionCheck Version:
Check version in web interface or installed program propertiesVerify Fix Applied:
Verify version is 4.5 or later and test authentication mechanisms📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful login from same source
- Authentication requests with unusual timing patterns
- Administrative actions from unexpected IP addresses
Network Indicators:
- Repeated identical authentication packets
- Unusual traffic patterns to management port (typically 8443)
SIEM Query:
source="wms_logs" AND (event_type="authentication" AND result="success" AND src_ip IN [previously_failed_ips])