CVE-2017-15644 : Exploit Details and Defense Strategies

Webmin 1.850 contains a vulnerability known as Server Side Request Forgery (SSRF) that can be exploited through the PATH_INFO parameter by making a GET request to tunnel/link.cgi and appending the desired URL, such as http://INTRANET-IP:8000.

Understanding CVE-2017-15644

Webmin 1.850 is susceptible to a Server Side Request Forgery (SSRF) vulnerability that can be triggered by manipulating the PATH_INFO parameter.

What is CVE-2017-15644?

CVE-2017-15644 is a security vulnerability in Webmin 1.850 that allows attackers to perform Server Side Request Forgery (SSRF) attacks by sending crafted requests to tunnel/link.cgi with malicious URLs.

The Impact of CVE-2017-15644

This vulnerability can be exploited by attackers to make unauthorized requests to internal systems, potentially leading to data leakage, unauthorized access, or further network compromise.

Technical Details of CVE-2017-15644

Webmin 1.850 vulnerability details.

Vulnerability Description

SSRF vulnerability in Webmin 1.850 via the PATH_INFO to tunnel/link.cgi
Attackers can send GET requests for tunnel/link.cgi with malicious URLs

Affected Systems and Versions

Product: Webmin 1.850
Vendor: N/A
Version: N/A

Exploitation Mechanism

Exploited through the PATH_INFO parameter
Attackers append a desired URL, such as http://INTRANET-IP:8000, to the GET request

Mitigation and Prevention

Protecting systems from CVE-2017-15644.

Immediate Steps to Take

Update Webmin to a patched version that addresses the SSRF vulnerability
Implement network-level controls to restrict access to sensitive URLs

Long-Term Security Practices

Regularly monitor and audit network traffic for suspicious activity
Educate users and administrators about the risks of SSRF attacks

Patching and Updates

Stay informed about security updates for Webmin
Apply patches promptly to mitigate the SSRF vulnerability