CVE-2018-6439 : Exploit Details and Defense Strategies

Brocade Fabric OS versions prior to 8.2.1, 8.1.2f, 8.0.2f, 7.4.2d are vulnerable to a privilege escalation issue through the configdownload command.

Understanding CVE-2018-6439

An overview of the vulnerability and its impact.

What is CVE-2018-6439?

This CVE identifies a vulnerability in the Brocade Fabric OS CLI versions before 8.2.1, 8.1.2f, 8.0.2f, 7.4.2d that could allow a local attacker to bypass restricted shell limitations and gain root privileges.

The Impact of CVE-2018-6439

The vulnerability enables unauthorized users to escalate their privileges, potentially leading to unauthorized access and control of the affected system.

Technical Details of CVE-2018-6439

Exploring the technical aspects of the vulnerability.

Vulnerability Description

The issue lies in the configdownload command of Brocade Fabric OS CLI, allowing attackers to escape the restricted shell and elevate their privileges to root level.

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 manipulate the configdownload command, enabling them to gain root access on the system.

Mitigation and Prevention

Measures to address and prevent the CVE-2018-6439 vulnerability.

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 indicating privilege escalation attempts.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access rights.
Regularly review and update access control policies to prevent unauthorized privilege escalation.

Patching and Updates

Apply security patches and updates provided by Brocade Communications Systems, Inc. to address the vulnerability.