CVE-2021-39124 : Exploit Details and Defense Strategies

This CVE-2021-39124 article provides insights into a Cross-Site Request Forgery vulnerability affecting Atlassian Jira Server and Data Center.

Understanding CVE-2021-39124

CVE-2021-39124 involves a CSRF failure retry feature in Atlassian Jira Server and Data Center before version 8.16.0, allowing remote attackers to bypass CSRF protection.

What is CVE-2021-39124?

The vulnerability enables malicious actors to deceive users into retrying a request, subsequently bypassing CSRF protection and executing crafted requests.

The Impact of CVE-2021-39124

The CSRF flaw in Atlassian Jira Server and Data Center versions prior to 8.16.0 permits attackers to replay manipulated requests, compromising data integrity and system security.

Technical Details of CVE-2021-39124

This section delves into the specifics of the vulnerability within Atlassian Jira Server and Data Center.

Vulnerability Description

Type: Cross-Site Request Forgery (CSRF)
Description: CSRF failure retry feature allows attackers to bypass CSRF protection

Affected Systems and Versions

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

Exploitation Mechanism

Attackers leverage trickery to coerce users into initiating request retries, subsequently evading CSRF defenses to execute malicious requests.

Mitigation and Prevention

Understanding the necessary steps to mitigate and prevent vulnerabilities is critical.

Immediate Steps to Take

Upgrade Atlassian Jira Server and Data Center to version 8.16.0 or higher
Educate users about the potential risks associated with retrying requests

Long-Term Security Practices

Regular security training for users on identifying social engineering tactics
Implement multi-factor authentication and stringent access controls

Patching and Updates

Apply security patches promptly to ensure systems are protected from known vulnerabilities