CVE-2018-6436 Explained : Impact and Mitigation
Learn about CVE-2018-6436 affecting Brocade Fabric OS versions prior to 8.2.1, 8.1.2f, 8.0.2f, 7.4.2d. Discover the impact, technical details, and mitigation steps for this privilege escalation vulnerability.
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 firmware download command.
Understanding CVE-2018-6436
This CVE identifies a vulnerability in Brocade Fabric OS that could allow a local attacker to gain root privileges.
What is CVE-2018-6436?
The firmware download command in Brocade Fabric OS CLI versions before 8.2.1, 8.1.2f, 8.0.2f, 7.4.2d has a flaw that enables a local attacker to bypass the restricted shell and elevate privileges to root.
The Impact of CVE-2018-6436
This vulnerability poses a significant risk as it allows unauthorized users to gain elevated privileges on affected systems, potentially leading to unauthorized access and control.
Technical Details of CVE-2018-6436
Brocade Fabric OS vulnerability details:
Vulnerability Description
The flaw in the firmware download command of Brocade Fabric OS CLI versions prior to 8.2.1, 8.1.2f, 8.0.2f, 7.4.2d allows local attackers to escape the restricted shell and obtain 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 execute arbitrary commands and potentially take full control of the affected system.
Mitigation and Prevention
Steps to address CVE-2018-6436:
Immediate Steps to Take
- Upgrade affected systems to versions 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 unauthorized access.
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 and enhance system security.