CVE-2021-39113 : Security Advisory and Response

This CVE article provides detailed information about a vulnerability affecting Atlassian Jira Server and Data Center versions.

Understanding CVE-2021-39113

This section elaborates on the vulnerability and its impact on affected systems.

What is CVE-2021-39113?

Affected versions of Atlassian Jira Server and Data Center have a Broken Access Control vulnerability that allows anonymous remote attackers to view cached content despite losing permissions.

The Impact of CVE-2021-39113

The vulnerability affects versions prior to 8.13.9 and from 8.14.0 to 8.18.0, potentially exposing sensitive information to unauthorized users.

Technical Details of CVE-2021-39113

This section provides specific technical details of the vulnerability.

Vulnerability Description

The vulnerability in Jira Server and Data Center allows unauthorized users to access cached content due to a Broken Access Control issue in the allowlist feature.

Affected Systems and Versions

Product: Jira Server
Versions Affected: < 8.13.9, >= 8.14.0, < 8.18.0
Product: Jira Data Center
Versions Affected: < 8.13.9, >= 8.14.0, < 8.18.0

Exploitation Mechanism

Attackers can exploit this vulnerability remotely to bypass permissions and access cached data without proper authorization.

Mitigation and Prevention

This section outlines steps to mitigate the CVE-2021-39113 vulnerability.

Immediate Steps to Take

Upgrade Atlassian Jira Server and Data Center to versions beyond 8.18.0 or apply the necessary patches provided by Atlassian.
Review and adjust access control settings to ensure proper data protection.

Long-Term Security Practices

Regularly monitor and update access controls to prevent unauthorized access.
Conduct security audits to identify and address any potential vulnerabilities.

Patching and Updates

Apply security patches and updates released by Atlassian to address the Broken Access Control vulnerability.