CVE-2025-0697
📋 TL;DR
This vulnerability in Telstra Smart Modem Gen 2 allows remote attackers to inject malicious content via manipulated HTTP Content-Disposition headers. Attackers could potentially execute arbitrary code or compromise the modem's functionality. All users of Telstra Smart Modem Gen 2 devices with firmware up to January 15, 2025 are affected.
💻 Affected Systems
- Telstra Smart Modem Gen 2
⚠️ 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 code execution leading to complete device compromise, network traffic interception, and lateral movement into connected networks.
Likely Case
Denial of service, configuration manipulation, or limited command injection affecting modem functionality.
If Mitigated
Minimal impact if devices are behind firewalls with strict inbound filtering and regular monitoring.
🎯 Exploit Status
Proof of concept code is publicly available on GitHub. Exploitation requires sending specially crafted HTTP requests to the modem's web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: Yes
Instructions:
1. Contact Telstra support for firmware update information. 2. Check for firmware updates via modem web interface. 3. Apply any available updates and restart the device.
🔧 Temporary Workarounds
Disable Remote Management
allDisable remote administration/management features on the modem to prevent external exploitation.
Network Segmentation
allPlace modems in isolated network segments with strict firewall rules limiting inbound connections.
🧯 If You Can't Patch
- Implement strict network access controls to limit connections to modem management interface
- Monitor network traffic for unusual HTTP requests targeting modem IP addresses
🔍 How to Verify
Check if Vulnerable:
Check firmware version via modem web interface (typically at 192.168.0.1 or 192.168.1.1) and compare against vulnerable versions.Check Version:
curl -s http://modem-ip/status | grep firmware or check web interfaceVerify Fix Applied:
Verify firmware version is newer than 20250115 and test with known exploit payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests with manipulated Content-Disposition headers
- Multiple failed authentication attempts to modem interface
Network Indicators:
- HTTP requests to modem IP on port 80/443 with unusual header patterns
- Outbound connections from modem to unknown destinations
SIEM Query:
sourceIP=modem_ip AND (http.method=POST OR http.method=GET) AND http.headers CONTAINS "Content-Disposition" AND http.headers CONTAINS "injection"