CVE-2019-25353
📋 TL;DR
CVE-2019-25353 is a buffer overflow vulnerability in Foscam Video Management System that allows attackers to cause denial of service by sending a specially crafted username during login. This affects organizations using Foscam VMS version 1.1.4.9 for video surveillance management.
💻 Affected Systems
- Foscam Video Management System
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system crash requiring manual restart, disrupting all video surveillance monitoring and recording capabilities.
Likely Case
Temporary service disruption affecting login functionality and potentially causing system instability.
If Mitigated
Minimal impact with proper network segmentation and monitoring in place.
🎯 Exploit Status
Exploit requires sending 520 'A' characters to username field during login attempt.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1.4.10 or later
Vendor Advisory: https://www.foscam.es/
Restart Required: Yes
Instructions:
1. Download latest version from Foscam website. 2. Backup configuration. 3. Install update. 4. Restart system. 5. Verify functionality.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict access to VMS login interface to trusted IP addresses only.
Input Validation via WAF
allImplement web application firewall rules to block usernames exceeding normal length.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate VMS from untrusted networks
- Deploy intrusion detection systems to monitor for exploit attempts
🔍 How to Verify
Check if Vulnerable:
Check VMS version in system settings or about dialog; version 1.1.4.9 is vulnerable.Check Version:
Check Help > About in Foscam VMS interfaceVerify Fix Applied:
Verify version is 1.1.4.10 or later and test login with normal credentials.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts with unusually long usernames
- System crash/restart events in application logs
Network Indicators:
- HTTP POST requests to login endpoint with >500 character usernames
- Sudden drop in VMS network traffic
SIEM Query:
source="foscam_vms" AND (username_length>100 OR event_type="crash")