CVE-2021-39122 : Vulnerability Insights and Analysis

This CVE affects Atlassian Jira Server and Data Center, allowing remote attackers to view users' emails through an Information Disclosure vulnerability.

Understanding CVE-2021-39122

This CVE was published on September 1, 2021, by Atlassian.

What is CVE-2021-39122?

CVE-2021-39122 is an Information Disclosure vulnerability in Atlassian Jira Server and Data Center. It enables anonymous remote attackers to access users' email information via the /rest/api/2/search endpoint.

The Impact of CVE-2021-39122

The affected versions include Jira Server before 8.5.13, from 8.6.0 to 8.13.5, and 8.14.0 to 8.15.1, exposing user emails to unauthorized entities.

Technical Details of CVE-2021-39122

This section delves into the specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability allows unauthorized users to retrieve users' email addresses through the /rest/api/2/search endpoint.

Affected Systems and Versions

Atlassian Jira Server versions before 8.5.13
Atlassian Jira Server versions 8.6.0 to 8.13.5
Atlassian Jira Server versions 8.14.0 to 8.15.1

Exploitation Mechanism

Attackers can exploit this vulnerability by sending malicious requests to the /rest/api/2/search endpoint to retrieve sensitive email information.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2021-39122.

Immediate Steps to Take

Upgrade affected systems to versions 8.5.13, 8.13.5, or 8.15.1, depending on the currently installed version.
Implement access controls and restrictions for the /rest/api/2/search endpoint.

Long-Term Security Practices

Regularly update Jira Server and Data Center to the latest versions to patch known vulnerabilities.
Conduct security audits and assessments to identify and address any potential security gaps.

Patching and Updates

Apply the latest patches and updates provided by Atlassian to fix the Information Disclosure vulnerability.