CVE-2025-13547
📋 TL;DR
A memory corruption vulnerability in D-Link DIR-822K and DWR-M920 routers allows remote attackers to manipulate the 'submit-url' argument in the '/boafrm/formDdns' file, potentially leading to arbitrary code execution or denial of service. This affects users of these specific router models with the vulnerable firmware version. The exploit is publicly available, increasing the risk of attacks.
💻 Affected Systems
- D-Link DIR-822K
- D-Link DWR-M920
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full device compromise, data theft, or use as a botnet node.
Likely Case
Denial of service or device crash, with potential for limited code execution in targeted attacks.
If Mitigated
Minimal impact if devices are isolated or patched, but residual risk from unpatched systems.
🎯 Exploit Status
Exploit details are published on GitHub, making it accessible for attackers with moderate skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
Check D-Link's official website or support for firmware updates; if none, consider workarounds or replacement.
🔧 Temporary Workarounds
Disable DDNS Service
allTurn off Dynamic DNS functionality to block access to the vulnerable '/boafrm/formDdns' endpoint.
Access router web interface, navigate to DDNS settings, and disable it.
Restrict Network Access
allUse firewall rules to limit access to the router's management interface from untrusted networks.
Configure firewall to allow only trusted IPs to access router admin ports (e.g., 80, 443).
🧯 If You Can't Patch
- Isolate affected routers in a separate network segment to limit lateral movement.
- Monitor network traffic for unusual patterns or exploit attempts targeting the DDNS endpoint.
🔍 How to Verify
Check if Vulnerable:
Check the firmware version in the router's web interface under 'Status' or 'System' settings.Check Version:
Log into router web interface and navigate to system information page.Verify Fix Applied:
Verify firmware version is updated to a non-vulnerable release, if available from vendor.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to '/boafrm/formDdns' with manipulated 'submit-url' parameters.
Network Indicators:
- Traffic spikes or anomalies on router management ports (e.g., 80, 443) from external sources.
SIEM Query:
source="router_logs" AND url="/boafrm/formDdns" AND method="POST" AND (param="submit-url" OR suspicious_payload)🔗 References
- https://github.com/QIU-DIE/CVE/issues/30
- https://github.com/QIU-DIE/CVE/issues/42
- https://vuldb.com/?ctiid.333314
- https://vuldb.com/?id.333314
- https://vuldb.com/?submit.693758
- https://vuldb.com/?submit.695428
- https://www.dlink.com/
- https://github.com/QIU-DIE/CVE/issues/30
- https://github.com/QIU-DIE/CVE/issues/42
