CVE-2021-39112 : Vulnerability Insights and Analysis

This article provides details about CVE-2021-39112, a vulnerability affecting Atlassian Jira Server and Data Center.

Understanding CVE-2021-39112

CVE-2021-39112 is a security vulnerability that allows remote attackers to carry out a reverse tabnapping attack through the Project Shortcuts feature in Atlassian Jira Server and Data Center.

What is CVE-2021-39112?

CVE-2021-39112 is a CWE-1022 vulnerability that involves redirecting users to malicious URLs via the Project Shortcuts feature.

The Impact of CVE-2021-39112

The vulnerability affects versions of Atlassian Jira Server and Data Center prior to 8.5.15, between 8.6.0 and 8.13.7, between 8.14.0 and 8.17.1, and between 8.18.0 and 8.18.1.

Technical Details of CVE-2021-39112

This section covers the technical aspects of the CVE.

Vulnerability Description

The CVE-2021-39112 vulnerability allows remote attackers to execute reverse tabnapping attacks using the Project Shortcuts feature in Atlassian Jira Server and Data Center.

Affected Systems and Versions

Atlassian Jira Server before 8.5.15
Atlassian Jira Server between 8.6.0 and 8.13.7
Atlassian Jira Server between 8.14.0 and 8.17.1
Atlassian Jira Server between 8.18.0 and 8.18.1

Exploitation Mechanism

Attackers exploit this vulnerability by redirecting users to malicious URLs through specially crafted Project Shortcuts.

Mitigation and Prevention

Learn how to address the CVE-2021-39112 vulnerability.

Immediate Steps to Take

Update Atlassian Jira Server and Data Center to the latest patched versions.
Implement security measures to prevent unauthorized access to the Project Shortcuts feature.
Monitor and restrict external links within the application.

Long-Term Security Practices

Regularly update and patch Atlassian Jira software to mitigate known vulnerabilities.
Educate users about the risks of clicking on unverified links within the system.
Engage in security testing and auditing to identify and address potential weaknesses.

Patching and Updates

Ensure timely installation of security patches and updates provided by Atlassian for Jira Server and Data Center.