CVE-2018-6438 : Security Advisory and Response

Brocade Fabric OS versions prior to 8.2.1, 8.1.2f, 8.0.2f, 7.4.2d have a vulnerability in the supportsave command that allows local attackers to gain root access.

Understanding CVE-2018-6438

This CVE involves a privilege escalation vulnerability in Brocade Fabric OS.

What is CVE-2018-6438?

The supportsave command in Brocade Fabric OS CLI versions before 8.2.1, 8.1.2f, 8.0.2f, 7.4.2d has a flaw that can be exploited by local attackers to bypass the restricted shell and achieve root access.

The Impact of CVE-2018-6438

This vulnerability could lead to unauthorized access and potential compromise of the affected systems, posing a significant security risk.

Technical Details of CVE-2018-6438

Brocade Fabric OS is susceptible to privilege escalation due to the following:

Vulnerability Description

The supportsave command vulnerability allows local attackers to bypass restrictions and escalate privileges to gain root access.

Affected Systems and Versions

Product: Brocade Fabric OS
Vendor: Brocade Communications Systems, Inc.
Versions Affected: All versions prior to 8.2.1, 8.1.2f, 8.0.2f, 7.4.2d

Exploitation Mechanism

The vulnerability can be exploited by a local attacker to escape the restricted shell and elevate privileges to root level.

Mitigation and Prevention

To address CVE-2018-6438, consider the following steps:

Immediate Steps to Take

Update Brocade Fabric OS to version 8.2.1, 8.1.2f, 8.0.2f, or 7.4.2d to mitigate the vulnerability.
Monitor system logs for any suspicious activities that may indicate exploitation attempts.

Long-Term Security Practices

Implement the principle of least privilege to restrict access rights for users and processes.
Regularly review and update access controls and permissions to prevent unauthorized actions.

Patching and Updates

Stay informed about security advisories and patches released by Brocade Communications Systems, Inc. to address vulnerabilities and enhance system security.