CVE-2019-17489 : Exploit Details and Defense Strategies

Jiangnan Online Judge (jnoj) version 0.8.0 is susceptible to a cross-site scripting (XSS) vulnerability that can be exploited through specific endpoints.

Understanding CVE-2019-17489

This CVE involves a security issue in the Jiangnan Online Judge platform.

What is CVE-2019-17489?

CVE-2019-17489 is a cross-site scripting vulnerability found in jnoj version 0.8.0, allowing attackers to execute malicious scripts in the context of a user's session.

The Impact of CVE-2019-17489

This vulnerability could lead to unauthorized access, data theft, and potential manipulation of user sessions on the affected platform.

Technical Details of CVE-2019-17489

Jiangnan Online Judge (jnoj) version 0.8.0 is affected by this XSS vulnerability.

Vulnerability Description

The XSS vulnerability in jnoj version 0.8.0 is triggered by the Problem[title] parameter in specific endpoints, enabling attackers to inject and execute malicious scripts.

Affected Systems and Versions

Affected System: Jiangnan Online Judge (jnoj)
Affected Version: 0.8.0

Exploitation Mechanism

The vulnerability can be exploited by manipulating the Problem[title] parameter in the web/polygon/problem/create, web/polygon/problem/update, or web/admin/problem/create endpoints.

Mitigation and Prevention

It is crucial to take immediate action to mitigate the risks associated with CVE-2019-17489.

Immediate Steps to Take

Disable the Problem[title] parameter in the affected endpoints.
Implement input validation to sanitize user inputs and prevent script injection.
Monitor and filter user-generated content for malicious scripts.

Long-Term Security Practices

Regularly update the Jiangnan Online Judge platform to the latest secure version.
Conduct security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

Apply patches or security updates provided by the Jiangnan Online Judge platform to fix the XSS vulnerability.