CVE-2017-15569 : Exploit Details and Defense Strategies

Redmine versions prior to 3.2.8, 3.3.x before 3.3.5, and 3.4.x before 3.4.3 have a security vulnerability related to cross-site scripting (XSS) that can be exploited through a multi-value field manipulation.

Understanding CVE-2017-15569

This CVE involves a cross-site scripting vulnerability in Redmine versions before 3.2.8, 3.3.x before 3.3.5, and 3.4.x before 3.4.3.

What is CVE-2017-15569?

In Redmine versions prior to 3.2.8, 3.3.x before 3.3.5, and 3.4.x before 3.4.3, a security vulnerability related to cross-site scripting (XSS) exists in the "queries_helper.rb" file in the "app/helpers" directory. This vulnerability can be exploited through a multi-value field with a manipulated value.

The Impact of CVE-2017-15569

Attackers can execute malicious scripts in the context of a user's session, potentially leading to unauthorized actions or data theft.
This vulnerability can be exploited remotely without authentication.

Technical Details of CVE-2017-15569

Redmine versions before 3.2.8, 3.3.x before 3.3.5, and 3.4.x before 3.4.3 are affected by this XSS vulnerability.

Vulnerability Description

The vulnerability exists in the "queries_helper.rb" file in the "app/helpers" directory, allowing attackers to inject and execute malicious scripts.

Affected Systems and Versions

Redmine versions prior to 3.2.8
Redmine 3.3.x before 3.3.5
Redmine 3.4.x before 3.4.3

Exploitation Mechanism

The vulnerability can be exploited through a multi-value field with a manipulated value that is not properly handled when generating an issue list.

Mitigation and Prevention

To address CVE-2017-15569, consider the following steps:

Immediate Steps to Take

Update Redmine to versions 3.2.8, 3.3.5, or 3.4.3, which contain fixes for this XSS vulnerability.
Regularly monitor security advisories and apply patches promptly.

Long-Term Security Practices

Implement input validation mechanisms to prevent XSS attacks.
Educate users about safe browsing practices and the risks of executing untrusted scripts.

Patching and Updates

Stay informed about security updates and apply patches as soon as they are released.