CVE-2023-24594 : Exploit Details and Defense Strategies

This CVE-2023-24594 pertains to a vulnerability identified as "BIG-IP TMM SSL vulnerability" on F5 products. It was published on May 3, 2023, by CVE assigner F5.

Understanding CVE-2023-24594

This section delves into the details of CVE-2023-24594, shedding light on what this vulnerability entails.

What is CVE-2023-24594?

The CVE-2023-24594 vulnerability occurs when an SSL profile is set up on a Virtual Server, leading to undisclosed traffic that can result in heightened CPU or SSL accelerator resource utilization. It is crucial to note that software versions that have reached End of Technical Support (EoTS) are not taken into consideration in the evaluation process.

The Impact of CVE-2023-24594

With a base score of 5.3 and a medium severity level, this vulnerability poses a threat in terms of increased CPU or resource utilization due to undisclosed traffic, potentially impacting the availability of the affected system.

Technical Details of CVE-2023-24594

This section provides a deeper dive into the technical aspects of CVE-2023-24594, focusing on its vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability stems from the utilization of an SSL profile on a Virtual Server, resulting in heightened CPU or SSL accelerator resource utilization when undisclosed traffic is present.

Affected Systems and Versions

BIG-IP:

Versions Affected: 16.1.2, 15.1.4.1, 14.1.5
Unaffected Version: 17.0.0

BIG-IP SPK:

Affected Version: 1.5.0
Not Applicable for Version 1.6.0

Exploitation Mechanism

The exploitation of this vulnerability involves leveraging undisclosed traffic within an SSL profile configured on a Virtual Server, leading to increased CPU or SSL accelerator resource usage.

Mitigation and Prevention

In this section, we outline the necessary steps to mitigate and prevent the CVE-2023-24594 vulnerability to ensure system security.

Immediate Steps to Take

Disable or reconfigure the SSL profile on affected Virtual Servers to reduce the risk of resource utilization escalation.
Monitor system performance closely for any unusual CPU or SSL accelerator resource spikes.

Long-Term Security Practices

Regularly update and patch F5 products to stay protected against known vulnerabilities.
Implement network monitoring tools to detect anomalous traffic patterns that could indicate exploit attempts.

Patching and Updates

Stay informed about security advisories from F5 and promptly apply patches or updates to mitigate vulnerabilities and enhance system security.