CVE-2018-17198 : Security Advisory and Response

Apache Roller versions 5.2.1, 5.2.0, and earlier are affected by a Server-side Request Forgery (SSRF) and File Enumeration vulnerability due to the use of Java SAX Parser in the XML-RPC interface. This vulnerability allows external entities in the XML DOCTYPE, potentially leading to SSRF/File Enumeration exploits.

Understanding CVE-2018-17198

This CVE involves an SSRF and File Enumeration vulnerability in Apache Roller versions 5.2.1, 5.2.0, and earlier unsupported versions.

What is CVE-2018-17198?

Apache Roller is susceptible to SSRF and File Enumeration attacks due to the Java SAX Parser's support for external entities in the XML DOCTYPE, even if the XML-RPC interface is disabled.

The Impact of CVE-2018-17198

The vulnerability exposes Apache Roller to potential SSRF and File Enumeration exploits, compromising the security and integrity of the system.

Technical Details of CVE-2018-17198

Apache Roller's vulnerability details and affected systems.

Vulnerability Description

The vulnerability arises from the Java SAX Parser's support for external entities in the XML DOCTYPE, allowing SSRF and File Enumeration attacks.

Affected Systems and Versions

Product: Apache Roller
Vendor: Apache Software Foundation
Versions: 5.2.1, 5.2.0, and earlier unsupported versions

Exploitation Mechanism

The vulnerability is exploited by utilizing the XML-RPC interface with external entities in the XML DOCTYPE, enabling SSRF and File Enumeration attacks.

Mitigation and Prevention

Steps to mitigate and prevent the CVE-2018-17198 vulnerability.

Immediate Steps to Take

Upgrade Apache Roller to version 5.2.2, the latest release.
Modify the Roller web.xml file by commenting out the XML-RPC Servlet mapping.

Long-Term Security Practices

Regularly update and patch Apache Roller to the latest versions.
Implement strict input validation and secure coding practices to prevent SSRF and File Enumeration vulnerabilities.
Monitor and restrict external entity usage in XML DOCTYPE.
Conduct security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

Ensure timely application of security patches and updates to Apache Roller to address known vulnerabilities.