CVE-2022-28706 Explained : Impact and Mitigation

A detailed overview of CVE-2022-28706 impacting F5 BIG-IP versions 16.1.x and 15.1.x.

Understanding CVE-2022-28706

This section delves into the vulnerability, impact, technical details, and mitigation strategies.

What is CVE-2022-28706?

CVE-2022-28706 affects F5 BIG-IP 16.1.x and 15.1.x, allowing undisclosed DNS resolver requests to trigger Traffic Management Microkernel (TMM) termination.

The Impact of CVE-2022-28706

With a CVSS base score of 5.9 (Medium severity), the vulnerability poses a high availability impact due to improper handling of DNS resolver requests.

Technical Details of CVE-2022-28706

Explore the specifics of the vulnerability including description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in F5 BIG-IP versions 16.1.x and 15.1.x arises from undisclosed DNS resolver requests leading to TMM termination.

Affected Systems and Versions

Versions prior to 16.1.2 for 16.1.x and 15.1.5.1 for 15.1.x are vulnerable, with unaffected versions specified.

Exploitation Mechanism

The vulnerability can be exploited by sending specific DNS resolver requests, causing TMM to terminate.

Mitigation and Prevention

Discover immediate steps to secure systems and establish long-term security practices.

Immediate Steps to Take

Update F5 BIG-IP to versions 16.1.2 or 15.1.5.1 to mitigate the vulnerability. Verify DNS resolver configurations for anomalies.

Long-Term Security Practices

Regularly monitor and update F5 BIG-IP systems, conduct security audits, and limit external DNS requests.

Patching and Updates

Stay informed about security advisories from F5 and promptly apply patches to address known vulnerabilities.