CVE-2015-1187
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on affected D-Link and TRENDnet networking devices via command injection in the ping tool's ping_addr parameter. Attackers can gain full control of vulnerable devices without authentication. This affects multiple router and networking device models from D-Link and TRENDnet.
💻 Affected Systems
- D-Link DIR-636L
- Various D-Link and TRENDnet devices with similar firmware
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent malware, pivot to internal networks, intercept all network traffic, and use the device as part of a botnet.
Likely Case
Device takeover leading to network eavesdropping, DNS hijacking, credential theft, and use in DDoS attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Multiple public exploit scripts available. Attack requires network access to device management interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Varies by device model - check vendor advisories
Vendor Advisory: http://securityadvisories.dlink.com/security/publication.aspx?name=SAP10052
Restart Required: Yes
Instructions:
1. Identify exact device model and current firmware version. 2. Visit vendor support site for your specific device. 3. Download latest firmware version. 4. Backup device configuration. 5. Upload and install new firmware via web interface. 6. Verify installation and restore configuration if needed.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to device management interface
Network Segmentation
allIsolate vulnerable devices from critical network segments
🧯 If You Can't Patch
- Place devices behind firewall with strict inbound filtering (block WAN access to management ports)
- Implement network monitoring for unusual outbound connections from these devices
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against vendor advisories. Test if ping_addr parameter accepts shell metacharacters in web interface.Check Version:
Check via device web interface under System Status or Administration sectionVerify Fix Applied:
Verify firmware version matches patched version from vendor. Test that ping_addr parameter no longer executes commands.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed login attempts followed by successful access
- Unexpected configuration changes
Network Indicators:
- Unusual outbound connections from device
- Traffic to known malicious IPs
- DNS queries to suspicious domains
SIEM Query:
source="router_logs" AND ("ping_addr" OR "command injection" OR "shell")🔗 References
- http://packetstormsecurity.com/files/130607/D-Link-DIR636L-Remote-Command-Injection.html
- http://packetstormsecurity.com/files/131465/D-Link-TRENDnet-NCC-Service-Command-Injection.html
- http://seclists.org/fulldisclosure/2015/Mar/15
- http://securityadvisories.dlink.com/security/publication.aspx?name=SAP10052
- http://www.securityfocus.com/bid/72848
- https://github.com/darkarnium/secpub/tree/master/Multivendor/ncc2
- http://packetstormsecurity.com/files/130607/D-Link-DIR636L-Remote-Command-Injection.html
- http://packetstormsecurity.com/files/131465/D-Link-TRENDnet-NCC-Service-Command-Injection.html
- http://seclists.org/fulldisclosure/2015/Mar/15
- http://securityadvisories.dlink.com/security/publication.aspx?name=SAP10052
- http://www.securityfocus.com/bid/72848
- https://github.com/darkarnium/secpub/tree/master/Multivendor/ncc2
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-1187
