CVE-2019-17537 : Vulnerability Insights and Analysis

Jiangnan Online Judge (jnoj) version 0.8.0 is vulnerable to a Directory Traversal flaw that enables attackers to delete files via the web interface.

Understanding CVE-2019-17537

This CVE involves a security issue in Jiangnan Online Judge (jnoj) version 0.8.0 that allows unauthorized file deletion through specific URL manipulation.

What is CVE-2019-17537?

The vulnerability in jnoj version 0.8.0 permits attackers to delete files by altering the 'id' and 'name' parameters in the URL, particularly by adding a '../' substring.

The Impact of CVE-2019-17537

The vulnerability poses a risk of unauthorized file deletion, potentially leading to data loss or system compromise.

Technical Details of CVE-2019-17537

This section provides detailed technical insights into the CVE.

Vulnerability Description

The flaw in jnoj version 0.8.0 allows attackers to perform directory traversal attacks, leading to file deletion through the web interface.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers exploit the vulnerability by manipulating the 'id' and 'name' parameters in the URL, specifically by including a '../' substring to delete files.

Mitigation and Prevention

Protecting systems from CVE-2019-17537 requires immediate actions and long-term security measures.

Immediate Steps to Take

Disable or restrict access to the vulnerable feature in jnoj version 0.8.0.
Implement input validation to prevent malicious input manipulation.

Long-Term Security Practices

Regularly update and patch the jnoj software to eliminate known vulnerabilities.
Conduct security assessments and penetration testing to identify and address potential weaknesses.

Patching and Updates

Apply patches or updates provided by the software vendor to fix the vulnerability in jnoj version 0.8.0.