CVE-2019-20106 Explained : Impact and Mitigation

A vulnerability in Atlassian Jira Server and Data Center versions allowed unauthorized individuals to add comments to tickets without proper permissions.

Understanding CVE-2019-20106

This CVE relates to a flaw in the access control mechanism of Atlassian Jira Server and Data Center versions.

What is CVE-2019-20106?

This vulnerability in Jira Server and Data Center versions prior to 7.13.12, 8.0.0 to 8.5.4, and 8.6.0 to 8.6.1 enabled remote attackers to make comments on tickets without the necessary commenting permissions.

The Impact of CVE-2019-20106

Unauthorized individuals could add comments to tickets they were not allowed to access
Remote attackers could exploit this flaw to make comments on tickets without proper authorization

Technical Details of CVE-2019-20106

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

Vulnerability Description

The vulnerability allowed unauthorized users to add comments to Jira tickets without the required permissions due to a flaw in the access control mechanism.

Affected Systems and Versions

Atlassian Jira Server and Data Center versions prior to 7.13.12
Versions 8.0.0 to 8.5.4
Versions 8.6.0 to 8.6.1

Exploitation Mechanism

Remote attackers could exploit this vulnerability by bypassing the access control mechanism to add comments to tickets.

Mitigation and Prevention

To address and prevent the exploitation of CVE-2019-20106, follow these steps:

Immediate Steps to Take

Upgrade Jira Server and Data Center to versions 7.13.12, 8.5.4, or 8.6.1
Monitor ticket comments for unauthorized activity

Long-Term Security Practices

Regularly review and update access control settings
Educate users on proper commenting permissions

Patching and Updates

Apply patches and updates provided by Atlassian to fix the access control vulnerability