Zero-Day Vulnerabilities In Dasan Switch DS2924: Authentication Bypass Exploit

A critical zero-day vulnerability has been discovered in the Dasan Switch DS2924, specifically affecting firmware versions 1.01.18 and 1.02.00. The vulnerability stems from insecure cookie management on the `/cgi-bin/webctrl.cgi` endpoint and other paths. Attackers can manipulate the `state` and `userName` cookies to bypass authentication, gaining unauthorized access to the device’s web control interface. This could lead to full compromise of the network device and potentially the entire network.

You Should Know:

1. Exploitation Details:

The vulnerability allows attackers to bypass authentication by tampering with cookies.
The affected endpoint is /cgi-bin/webctrl.cgi.

2. Mitigation Steps:

Update the firmware to the latest version if available.
Implement strict access control lists (ACLs) to restrict access to the device’s management interface.
Monitor and log access to the `/cgi-bin/webctrl.cgi` endpoint.

3. Practice Verified Commands:

Linux Command to Monitor Logs:

tail -f /var/log/nginx/access.log | grep "/cgi-bin/webctrl.cgi"

Windows Command to Check Network Connections:
```
netstat -an | findstr "80"
```

Linux Command to Block Suspicious IPs:

iptables -A INPUT -s <suspicious-ip> -j DROP

Windows Command to Disable Unused Services:
```
sc config <service-name> start= disabled
```

4. Additional Security Measures:

Use strong, unique passwords for device management interfaces.
Regularly audit and update firewall rules.
Enable HTTPS for secure communication with the device’s web interface.

What Undercode Say:

The discovery of this zero-day vulnerability highlights the importance of robust security practices in network device management. Regularly updating firmware, monitoring access logs, and implementing strict access controls are essential to mitigate such risks. Below are additional commands and tools to enhance your cybersecurity posture:

Linux Command to Check Open Ports:
```
nmap -sV -p 1-65535 <target-ip>
```
Windows Command to List Running Processes:
```
Get-Process
```
Linux Command to Encrypt Files:
```
gpg -c <file-name>
```
Windows Command to Check for Malware:
```
Get-MpThreat
```

For further reading on securing network devices, visit:

Stay vigilant and proactive in securing your network infrastructure.

References:

Reported By: Mohamedshahat Shiky – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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