CVE-2021-39123 : Security Advisory and Response

This CVE-2021-39123 article provides details about a Denial of Service (DoS) vulnerability in Atlassian Jira Server and Data Center.

Understanding CVE-2021-39123

CVE-2021-39123 concerns unauthenticated remote attackers impacting application availability through a specific endpoint.

What is CVE-2021-39123?

Atlassian Jira Server and Data Center versions prior to 8.16.0 are vulnerable to an unauthenticated remote attack.

The Impact of CVE-2021-39123

Attackers can cause a Denial of Service (DoS) attack on the application.

Technical Details of CVE-2021-39123

This section covers specific technical aspects of the CVE.

Vulnerability Description

Affected versions of Jira Server and Data Center have a vulnerability in the /rest/gadget/1.0/createdVsResolved/generate endpoint.

Affected Systems and Versions

Products: Jira Server, Jira Data Center
Vendor: Atlassian
Vulnerable Versions: < 8.16.0

Exploitation Mechanism

Unauthenticated remote attackers can exploit the vulnerability to impact application availability.

Mitigation and Prevention

Learn how to protect systems from CVE-2021-39123.

Immediate Steps to Take

Update affected Atlassian Jira Server and Data Center instances to version 8.16.0 or later.
Monitor network traffic for signs of exploitation.

Long-Term Security Practices

Regularly update and patch Atlassian products to prevent vulnerabilities.
Implement network security measures to detect and block DoS attacks.

Patching and Updates

Atlassian has released version 8.16.0 to address the vulnerability. Ensure timely updates to secure systems.