CVE-2020-4017 : Vulnerability Insights and Analysis

CVE-2020-4017 was published on April 21, 2020, by Atlassian. It affects Crucible and Fisheye versions prior to 4.8.1, allowing remote attackers to access information about configured Jira application links.

Understanding CVE-2020-4017

This CVE involves an information disclosure vulnerability in the crucible-jira-ril plugin in Atlassian Fisheye and Crucible.

What is CVE-2020-4017?

The vulnerability in the /rest/jira-ril/1.0/jira-rest/applinks resource allows unauthorized access to Jira application links, potentially exposing sensitive information.

The Impact of CVE-2020-4017

The vulnerability enables remote attackers to retrieve details about configured Jira application links, leading to potential information exposure and security risks.

Technical Details of CVE-2020-4017

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

Vulnerability Description

The /rest/jira-ril/1.0/jira-rest/applinks resource in the crucible-jira-ril plugin in Atlassian Fisheye and Crucible before version 4.8.1 allows unauthorized access to Jira application links, resulting in information disclosure.

Affected Systems and Versions

Product: Crucible
Vendor: Atlassian
Versions Affected: < 4.8.1
Product: Fisheye
Vendor: Atlassian
Versions Affected: < 4.8.1

Exploitation Mechanism

Remote attackers can exploit this vulnerability to retrieve information about any configured Jira application links, potentially compromising sensitive data.

Mitigation and Prevention

Protecting systems from CVE-2020-4017 requires immediate actions and long-term security measures.

Immediate Steps to Take

Upgrade Crucible and Fisheye to version 4.8.1 or higher to mitigate the vulnerability.
Monitor and restrict access to the /rest/jira-ril/1.0/jira-rest/applinks resource.

Long-Term Security Practices

Regularly update and patch Atlassian products to address security vulnerabilities promptly.
Implement access controls and authentication mechanisms to limit unauthorized access to sensitive resources.

Patching and Updates

Apply security patches and updates provided by Atlassian to ensure the latest security fixes are in place.