CVE-2025-25530
📋 TL;DR
A buffer overflow vulnerability in Digital China DCBI-Netlog-LAB Gateway 1.0 allows attackers to crash devices or execute arbitrary commands by exploiting insufficient length validation in parental control configuration saving. This affects all deployments of this specific gateway version. Attackers can achieve remote code execution with high privileges.
💻 Affected Systems
- Digital China DCBI-Netlog-LAB Gateway
⚠️ 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
Remote unauthenticated attacker gains full system control, installs persistent backdoors, pivots to internal networks, and exfiltrates sensitive data.
Likely Case
Attackers crash the gateway causing service disruption, then execute arbitrary commands to compromise the device and potentially move laterally.
If Mitigated
With proper network segmentation and access controls, impact is limited to gateway service disruption without lateral movement.
🎯 Exploit Status
Proof-of-concept code is publicly available. Exploitation requires network access to the gateway's management interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
Restart Required: No
Instructions:
1. Contact Digital China for patch availability 2. If patch exists, download from vendor portal 3. Apply patch following vendor instructions 4. Verify fix with testing
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict access to gateway management interface to trusted IPs only
iptables -A INPUT -p tcp --dport [MANAGEMENT_PORT] -s [TRUSTED_NETWORK] -j ACCEPT
iptables -A INPUT -p tcp --dport [MANAGEMENT_PORT] -j DROP
Disable Parental Control Feature
allTemporarily disable parental control functionality if not required
🧯 If You Can't Patch
- Isolate gateway on separate VLAN with strict firewall rules
- Implement network-based intrusion prevention system (IPS) with buffer overflow detection
🔍 How to Verify
Check if Vulnerable:
Check gateway web interface or CLI for version information showing 'DCBI-Netlog-LAB Gateway 1.0'Check Version:
Check web interface at /status or use vendor-specific CLI commandsVerify Fix Applied:
Verify version has been updated from 1.0 or test parental control configuration with overflow payloads📡 Detection & Monitoring
Log Indicators:
- Unusual parental control configuration changes
- Gateway crash/restart events
- Large configuration payloads in requests
Network Indicators:
- Unusual traffic to gateway management port
- Buffer overflow patterns in network traffic
- Exploit kit signatures
SIEM Query:
source="gateway_logs" AND (event_type="crash" OR config_size>10000)