CVE-2024-24332
📋 TL;DR
This CVE describes a command injection vulnerability in TOTOLINK A3300R routers, allowing attackers to execute arbitrary commands via the url parameter in the setUrlFilterRules function. It affects users of the specified router version, potentially leading to full device compromise. The high CVSS score indicates critical severity with broad impact.
💻 Affected Systems
- TOTOLINK A3300R
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full remote code execution leading to device takeover, data theft, network pivoting, and persistent backdoor installation.
Likely Case
Unauthenticated attackers exploiting the vulnerability to execute commands, potentially disrupting services or stealing sensitive information.
If Mitigated
Limited impact if network segmentation, firewalls, or access controls prevent exploitation, but risk remains if devices are exposed.
🎯 Exploit Status
Public proof-of-concept details are available in GitHub references, suggesting easy exploitation by attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not known
Restart Required: No
Instructions:
Check TOTOLINK's official website or support channels for firmware updates; if available, download and apply the patch via the router's admin interface.
🔧 Temporary Workarounds
Disable URL Filtering Feature
allTurn off the URL filtering functionality in the router settings to remove the vulnerable endpoint.
Access router admin panel, navigate to URL filtering settings, and disable it.
Network Segmentation
allIsolate the router from critical internal networks to limit potential damage if exploited.
Configure firewall rules to restrict access to the router's management interface.
🧯 If You Can't Patch
- Implement strict network access controls to block external access to the router's management interface.
- Monitor logs for unusual activity and consider replacing the router with a patched or different model.
🔍 How to Verify
Check if Vulnerable:
Check the router's firmware version via the admin interface; if it matches V17.0.0cu.557_B20221024, it is vulnerable.Check Version:
Log into the router's web interface and navigate to the system information or firmware section.Verify Fix Applied:
After applying any update, verify the firmware version has changed to a non-vulnerable release.📡 Detection & Monitoring
Log Indicators:
- Unusual commands or shell activity in router logs, especially related to setUrlFilterRules.
Network Indicators:
- Suspicious HTTP requests to the router's management interface with crafted url parameters.
SIEM Query:
Search for HTTP POST requests to paths containing 'setUrlFilterRules' with anomalous parameter values.