CVE-2020-4016 Explained : Impact and Mitigation
Learn about CVE-2020-4016 affecting Atlassian Crucible and Fisheye versions before 4.8.1. Discover how remote attackers can exploit an information disclosure vulnerability to access Jira application link IDs.
CVE-2020-4016 was published on April 21, 2020, affecting Atlassian Crucible and Fisheye versions prior to 4.8.1. The vulnerability allows remote attackers to obtain the ID of configured Jira application links through an information disclosure issue.
Understanding CVE-2020-4016
This CVE identifies an information disclosure vulnerability in Atlassian Crucible and Fisheye.
What is CVE-2020-4016?
The vulnerability in the crucible-jira-ril plugin in Atlassian Fisheye and Crucible before version 4.8.1 enables remote attackers to retrieve the ID of configured Jira application links.
The Impact of CVE-2020-4016
The vulnerability poses a risk of exposing sensitive information, potentially aiding attackers in further exploiting the affected systems.
Technical Details of CVE-2020-4016
This section delves into the technical aspects of the CVE.
Vulnerability Description
The /plugins/servlet/jira-blockers/ resource in the crucible-jira-ril plugin in Atlassian Fisheye and Crucible before version 4.8.1 allows unauthorized access to Jira application link IDs.
Affected Systems and Versions
- Product: Crucible
- Vendor: Atlassian
- Versions Affected: < 4.8.1
- Product: Fisheye
- Vendor: Atlassian
- Versions Affected: < 4.8.1
Exploitation Mechanism
Attackers can exploit this vulnerability remotely to extract Jira application link IDs, potentially leading to further security breaches.
Mitigation and Prevention
Protecting systems from CVE-2020-4016 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Upgrade Atlassian Crucible and Fisheye to version 4.8.1 or newer to mitigate the vulnerability.
- Monitor and restrict access to sensitive information within the affected systems.
Long-Term Security Practices
- Regularly update software and plugins to patch known vulnerabilities.
- Implement access controls and authentication mechanisms to prevent unauthorized access.
- Conduct security audits and assessments to identify and address potential risks.
- Stay informed about security advisories and updates from Atlassian.
Patching and Updates
Apply security patches and updates provided by Atlassian to address CVE-2020-4016 and enhance the overall security posture of the systems.