CVE-2019-20101 Explained : Impact and Mitigation

A Broken Access Control vulnerability in the /rest/whitelist/<version>/check endpoint of Atlassian Jira Server and Data Center versions before 8.13.3, as well as from version 8.14.0 before 8.14.1, enables anonymous remote attackers to gain access and view whitelist rules.

Understanding CVE-2019-20101

This CVE involves an Improper Authorization issue in Atlassian Jira Server and Data Center, potentially allowing unauthorized access to whitelist rules.

What is CVE-2019-20101?

CVE-2019-20101 is a security vulnerability in Atlassian Jira Server and Data Center versions that could be exploited by remote attackers to view whitelist rules.

The Impact of CVE-2019-20101

The vulnerability allows anonymous remote attackers to access and view whitelist rules, potentially leading to unauthorized information disclosure and security breaches.

Technical Details of CVE-2019-20101

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

Vulnerability Description

The Broken Access Control vulnerability in the /rest/whitelist/<version>/check endpoint of Atlassian Jira Server and Data Center versions before 8.13.3 and from version 8.14.0 before 8.14.1 allows unauthorized access to whitelist rules.

Affected Systems and Versions

Product: Jira Server
Vendor: Atlassian
Versions Affected: < 8.13.3, >= 8.14.0, < 8.14.1
Product: Jira Data Center
Vendor: Atlassian
Versions Affected: < 8.13.3, >= 8.14.0, < 8.14.1

Exploitation Mechanism

The vulnerability can be exploited by anonymous remote attackers to gain access to and view whitelist rules, potentially compromising sensitive information.

Mitigation and Prevention

Protecting systems from CVE-2019-20101 is crucial to maintaining security.

Immediate Steps to Take

Update Jira Server and Data Center to versions 8.13.3 or higher to mitigate the vulnerability.
Monitor and restrict access to the /rest/whitelist/<version>/check endpoint.

Long-Term Security Practices

Regularly review and update access control policies.
Conduct security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Apply security patches provided by Atlassian promptly to address the Broken Access Control vulnerability.