CVE-2022-35236 Explained : Impact and Mitigation
Learn about CVE-2022-35236, a vulnerability in F5 BIG-IP affecting versions 14.1.x, 15.1.x, and 16.1.x. Discover its impact, technical details, and mitigation steps to enhance system security.
This article provides details about the HTTP2 profile vulnerability with CVE ID CVE-2022-35236 affecting F5 BIG-IP versions 14.1.x, 15.1.x, and 16.1.x. Learn about the impact, technical details, and mitigation steps to secure your systems.
Understanding CVE-2022-35236
The CVE-2022-35236 vulnerability pertains to a flaw in BIG-IP versions where improperly configured HTTP2 profiles on virtual servers can lead to escalated memory resource usage.
What is CVE-2022-35236?
In BIG-IP Versions 16.1.x before 16.1.2.2, 15.1.x before 15.1.6.1, and 14.1.x before 14.1.5, undisclosed traffic under HTTP2 profiles can cause a spike in memory resource utilization.
The Impact of CVE-2022-35236
The vulnerability poses a high availability impact with a base severity score of 7.5. It does not affect confidentiality or integrity but can lead to a significant increase in memory usage.
Technical Details of CVE-2022-35236
Vulnerability Description
The flaw arises from the handling of HTTP2 traffic on virtual servers, resulting in uncontrolled resource consumption and heightened memory utilization.
Affected Systems and Versions
F5 BIG-IP versions 14.1.x, 15.1.x, and 16.1.x are impacted by this vulnerability, while versions 13.1.x and 17.0.x remain unaffected.
Exploitation Mechanism
By sending undisclosed traffic to a server with an HTTP2 profile, attackers can exploit the vulnerability to increase memory resource utilization.
Mitigation and Prevention
Immediate Steps to Take
It is recommended to update the affected BIG-IP versions to the latest patched releases to mitigate the vulnerability. Additionally, configure HTTP2 profiles securely to minimize risks.
Long-Term Security Practices
Regularly monitor and audit memory resource utilization on virtual servers to detect any abnormal spikes that could indicate exploitation attempts.
Patching and Updates
Stay informed about security updates and patches released by F5 Networks for BIG-IP devices to address vulnerabilities like CVE-2022-35236 and enhance system security.