CVE-2021-26075 : What You Need to Know

A detailed overview of CVE-2021-26075 affecting Atlassian's Jira Server and Data Center.

Understanding CVE-2021-26075

This CVE impacts Jira Server and Data Center instances due to an information disclosure vulnerability.

What is CVE-2021-26075?

The Jira importers plugin AttachTemporaryFile rest resource in Jira Server and Data Center allowed remote authenticated attackers to access the Jira application data directory path via an error message.

The Impact of CVE-2021-26075

The vulnerability enables attackers to obtain sensitive information, potentially leading to further security breaches and unauthorized access to data.

Technical Details of CVE-2021-26075

This section delves into the specifics of the vulnerability.

Vulnerability Description

The flaw in the AttachTemporaryFile rest resource exposes the full path of the Jira application data directory in the error message, posing a risk of information leakage.

Affected Systems and Versions

Jira Server versions prior to 8.5.12, from 8.6.0 to 8.13.4, and 8.14.0 to 8.15.1, along with corresponding Data Center versions, are vulnerable.

Exploitation Mechanism

Remote authenticated attackers can exploit this vulnerability by submitting an invalid filename to the importers plugin and observing the error message revealing the application directory path.

Mitigation and Prevention

Learn how to address and mitigate the risks associated with CVE-2021-26075.

Immediate Steps to Take

Immediately update Jira Server and Data Center to the patched versions to prevent exploitation.

Long-Term Security Practices

Implement strict access control measures, regular security assessments, and employee training on identifying phishing and social engineering attempts.

Patching and Updates

Regularly apply security patches and updates from Atlassian to address known vulnerabilities and enhance system security.