CVE-2017-0924 : Exploit Details and Defense Strategies

Gitlab Community Edition version 10.2.4 is vulnerable to lack of input validation in the labels component, leading to persistent cross-site scripting.

Understanding CVE-2017-0924

What is CVE-2017-0924?

The vulnerability in GitLab Community Edition version 10.2.4 allows for persistent cross-site scripting due to a lack of input validation in the labels component.

The Impact of CVE-2017-0924

This vulnerability could be exploited by attackers to execute malicious scripts in the context of a user's browser, potentially leading to unauthorized access, data theft, or other harmful actions.

Technical Details of CVE-2017-0924

Vulnerability Description

The labels component in GitLab Community Edition version 10.2.4 lacks proper input validation, enabling attackers to inject and execute malicious scripts.

Affected Systems and Versions

Product: GitLab Community and Enterprise Editions
Versions Affected: 10.2.4
Fixed Versions: 10.0.5, 10.1.6, 10.2.6, 10.3.4

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into the labels component, which can then be executed in the context of a user's browser, leading to cross-site scripting attacks.

Mitigation and Prevention

Immediate Steps to Take

Upgrade GitLab to the fixed versions: 10.0.5, 10.1.6, 10.2.6, or 10.3.4
Implement input validation mechanisms to prevent script injection
Regularly monitor and audit user-generated content for malicious scripts

Long-Term Security Practices

Conduct regular security assessments and code reviews to identify and address vulnerabilities
Educate developers on secure coding practices to prevent similar issues in the future

Patching and Updates

Stay informed about security updates and patches released by GitLab
Promptly apply patches to ensure that known vulnerabilities are mitigated