CVE-2019-25435
📋 TL;DR
CVE-2019-25435 is a local buffer overflow vulnerability in Sricam DeviceViewer 3.12.0.1 that allows authenticated attackers to execute arbitrary code by exploiting the user management add user function. Attackers can inject malicious payloads through the Username field to trigger stack-based buffer overflow and bypass data execution prevention via ROP chain gadgets. This affects organizations using Sricam DeviceViewer for surveillance system management.
💻 Affected Systems
- Sricam DeviceViewer
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the surveillance system, potentially accessing camera feeds, modifying configurations, and using the system as a foothold for lateral movement within the network.
Likely Case
Attacker gains authenticated access to the DeviceViewer application and executes arbitrary code to compromise the surveillance system, potentially accessing or manipulating camera feeds and system settings.
If Mitigated
Limited impact due to network segmentation, proper authentication controls, and monitoring that detects unusual user management activities.
🎯 Exploit Status
Exploit requires authenticated access and knowledge of ROP chain construction to bypass DEP. Public exploit code is available on Exploit-DB.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.sricam.com/
Restart Required: No
Instructions:
No official patch available. Consider upgrading to newer versions if available, or implement workarounds and mitigations.
🔧 Temporary Workarounds
Restrict User Management Access
allLimit access to the user management functionality to only essential administrative personnel.
Network Segmentation
allIsolate the DeviceViewer system from critical network segments and implement strict firewall rules.
🧯 If You Can't Patch
- Implement strict access controls and multi-factor authentication for DeviceViewer access
- Monitor user management activities and audit logs for unusual username entries or privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check DeviceViewer version in Help > About menu. If version is 3.12.0.1, the system is vulnerable.Check Version:
Check Help > About in DeviceViewer GUI (no CLI command available)Verify Fix Applied:
Verify version has been updated beyond 3.12.0.1 or workarounds have been implemented.📡 Detection & Monitoring
Log Indicators:
- Unusual user creation events
- Long or malformed username entries in user management logs
- Process crashes related to DeviceViewer
Network Indicators:
- Unusual outbound connections from DeviceViewer system
- Traffic patterns suggesting command and control activity
SIEM Query:
source="deviceviewer_logs" AND (event_type="user_creation" AND username_length>50) OR (process_name="DeviceViewer.exe" AND event_type="crash")