CVE-2017-18034 : Exploit Details and Defense Strategies

Atlassian Fisheye and Crucible versions prior to 4.5.1 and 4.6.0 are vulnerable to a Cross-Site Scripting (XSS) attack that allows remote attackers to inject arbitrary HTML or JavaScript.

Understanding CVE-2017-18034

This CVE involves a security vulnerability in the source browsing feature of Atlassian Fisheye and Crucible.

What is CVE-2017-18034?

The vulnerability in Fisheye and Crucible versions prior to 4.5.1 and 4.6.0 enables attackers with write access to an indexed repository to inject malicious code using a specially crafted branch name.

The Impact of CVE-2017-18034

The XSS vulnerability allows remote attackers to execute arbitrary HTML or JavaScript code, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2017-18034

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The vulnerability arises from how deleted files within a repository branch are displayed, allowing attackers to exploit the XSS vulnerability.

Affected Systems and Versions

Product: Fisheye and Crucible
Vendor: Atlassian
Versions Affected: Prior to 4.5.1 and 4.6.0

Exploitation Mechanism

Attackers with write access to an indexed repository can inject malicious HTML or JavaScript by utilizing a specially crafted branch name.

Mitigation and Prevention

Protect your systems from CVE-2017-18034 with these mitigation strategies.

Immediate Steps to Take

Upgrade Fisheye and Crucible to versions 4.5.1 or 4.6.0, where the vulnerability is patched.
Restrict write access to repositories to trusted users only.
Regularly monitor and audit repository activities for suspicious behavior.

Long-Term Security Practices

Implement regular security training for developers and administrators on secure coding practices.
Conduct periodic security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by Atlassian for Fisheye and Crucible.
Promptly apply patches to ensure your systems are protected against known vulnerabilities.