CVE-2017-6155 : What You Need to Know

F5 Networks, Inc. disclosed a vulnerability affecting various versions of BIG-IP products, potentially leading to service disruption. The issue involves improperly formed SPDY or HTTP/2 requests.

Understanding CVE-2017-6155

This CVE impacts F5 BIG-IP versions 13.0.0, 12.0.0-12.1.3.1, 11.6.0-11.6.2, 11.4.1-11.5.5, and 11.2.1.

What is CVE-2017-6155?

When malformed SPDY or HTTP/2 requests occur on affected versions of F5 BIG-IP, it can disrupt service to TMM. The vulnerability only affects the data plane if a virtual server has an attached SPDY or HTTP/2 profile.

The Impact of CVE-2017-6155

The vulnerability may result in a denial of service (DoS) condition.

Technical Details of CVE-2017-6155

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

Improperly formed SPDY or HTTP/2 requests on specific F5 BIG-IP versions can lead to service disruption to TMM.

Affected Systems and Versions

BIG-IP versions 13.0.0, 12.0.0-12.1.3.1, 11.6.0-11.6.2, 11.4.1-11.5.5, 11.2.1

Exploitation Mechanism

The data plane is vulnerable only if a virtual server has an attached SPDY or HTTP/2 profile.

Mitigation and Prevention

Steps to address and prevent the CVE-2017-6155 vulnerability.

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly.
Disable SPDY or HTTP/2 profiles if not required.

Long-Term Security Practices

Regularly monitor and update security configurations.
Conduct security assessments to identify vulnerabilities.

Patching and Updates

Stay informed about security advisories from F5 Networks.