CVE-2019-15539 : Exploit Details and Defense Strategies

A vulnerability has been identified in the Project Documentation feature of MantisBT version 2.21.3 and earlier, allowing for arbitrary code execution through a stored cross-site scripting (XSS) attack.

Understanding CVE-2019-15539

This CVE pertains to a security flaw in MantisBT that enables attackers to execute malicious code by exploiting a cross-site scripting vulnerability.

What is CVE-2019-15539?

The vulnerability in the Project Documentation feature of MantisBT version 2.21.3 and earlier permits attackers to run arbitrary code through a stored XSS attack.

The Impact of CVE-2019-15539

The vulnerability allows attackers to execute arbitrary code by uploading an attachment with a specially crafted filename, potentially compromising the security of the system.

Technical Details of CVE-2019-15539

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The proj_doc_edit_page.php Project Documentation feature in MantisBT before 2.21.3 is susceptible to a stored cross-site scripting (XSS) vulnerability, enabling the execution of arbitrary code if Content Security Policy (CSP) settings permit it.

Affected Systems and Versions

MantisBT version 2.21.3 and earlier

Exploitation Mechanism

Attackers can exploit the vulnerability by uploading an attachment with a specifically crafted filename.
If the CSP settings allow it, the arbitrary code will be executed when editing the page of the uploaded document.

Mitigation and Prevention

Protecting systems from CVE-2019-15539 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update MantisBT to version 2.21.3 or later to mitigate the vulnerability.
Review and adjust CSP settings to restrict the execution of arbitrary code.

Long-Term Security Practices

Regularly monitor and audit file uploads and attachments for suspicious filenames.
Educate users on safe attachment handling practices to prevent XSS attacks.

Patching and Updates

Apply patches and updates provided by MantisBT to address security vulnerabilities promptly.