CVE-2015-7280
📋 TL;DR
This vulnerability allows remote attackers to gain administrative access to ReadyNet WRT300N-DD routers by using the default password 'admin' for the admin account. Anyone using these devices with the affected firmware is vulnerable to complete device takeover.
💻 Affected Systems
- ReadyNet WRT300N-DD
📦 What is this software?
Wrt300n Dd Firmware by Readynet Solutions
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of network security, allowing attackers to reconfigure the router, intercept traffic, install malware, or use the device as a pivot point to attack other internal systems.
Likely Case
Unauthorized administrative access leading to network configuration changes, DNS hijacking, or credential theft from network traffic.
If Mitigated
Limited impact if default credentials are changed and proper network segmentation is implemented.
🎯 Exploit Status
Exploitation requires network access to the web interface but is trivial once access is obtained. The default credentials are publicly documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None available
Vendor Advisory: No vendor advisory found
Restart Required: No
Instructions:
No official patch exists. The only fix is to change the default admin password immediately.
🔧 Temporary Workarounds
Change Default Admin Password
allImmediately change the default 'admin' password to a strong, unique password.
Login to web interface at http://[router-ip], navigate to Administration > Management, change admin password
Disable Remote Administration
allEnsure the web administration interface is not accessible from the WAN/internet side.
Login to web interface, navigate to Administration > Management, disable 'Remote Management' if enabled
🧯 If You Can't Patch
- Segment the router on an isolated network segment with strict firewall rules
- Implement network monitoring to detect authentication attempts to the admin interface
🔍 How to Verify
Check if Vulnerable:
Attempt to login to the router's web interface at http://[router-ip] using username 'admin' and password 'admin'Check Version:
Login to web interface and check firmware version on status page, or check router label for hardware versionVerify Fix Applied:
Verify that the default credentials no longer work and that a strong password is required📡 Detection & Monitoring
Log Indicators:
- Failed login attempts followed by successful admin login
- Configuration changes from unexpected IP addresses
Network Indicators:
- HTTP POST requests to login.cgi with default credentials
- Unusual administrative traffic patterns
SIEM Query:
source="router" AND (event="login success" AND user="admin") OR (event="configuration change")