CVE-2017-6227 : Vulnerability Insights and Analysis

An exploit has been discovered in the IPv6 stack on certain Brocade Fibre Channel SAN devices that are running versions of Brocade Fabric OS (FOS) earlier than 7.4.2b, 8.1.2, and 8.2.0. This vulnerability could potentially enable a malicious individual to disrupt system operations and overload the CPU by sending carefully designed Router Advertisement (RA) messages to a specific targeted system.

Understanding CVE-2017-6227

This CVE identifies a vulnerability in the IPv6 stack on Brocade Fibre Channel SAN products running Brocade Fabric OS (FOS) versions before 7.4.2b, 8.1.2, and 8.2.0.

What is CVE-2017-6227?

Vulnerability in the IPv6 stack on Brocade Fibre Channel SAN devices
Allows an attacker to disrupt system operations and overload the CPU
Caused by crafted Router Advertisement (RA) messages

The Impact of CVE-2017-6227

Potential denial of service (DoS) attack
CPU consumption and device hang conditions

Technical Details of CVE-2017-6227

This section provides technical details about the vulnerability.

Vulnerability Description

Exploit in the IPv6 stack on Brocade Fibre Channel SAN devices
Vulnerable versions: all before 7.4.2b, 8.1.2, and 8.2.0

Affected Systems and Versions

Product: Brocade FABRIC OS
Vendor: Brocade Communications Systems, Inc.
Affected versions: all versions before 7.4.2b, 8.1.2, and 8.2.0

Exploitation Mechanism

Attacker sends carefully designed Router Advertisement (RA) messages
Disrupts system operations and overloads the CPU

Mitigation and Prevention

Protective measures to address CVE-2017-6227.

Immediate Steps to Take

Update affected systems to versions 7.4.2b, 8.1.2, or 8.2.0
Monitor network traffic for any suspicious RA messages

Long-Term Security Practices

Implement network segmentation to limit the impact of potential attacks
Regularly review and apply security patches and updates

Patching and Updates

Apply patches provided by Brocade Communications Systems, Inc.
Stay informed about security advisories and updates