CVE-2018-18555 : What You Need to Know

VyOS 1.1.8 has a vulnerability in its sandboxing feature that allows authenticated operator users to escape the confined environment and gain access to the underlying Linux shell.

Understanding CVE-2018-18555

VyOS 1.1.8 vulnerability allows operators to bypass the management shell and execute OS commands.

What is CVE-2018-18555?

VyOS 1.1.8 vulnerability enables authenticated operator users to break out of the management shell using specific shell characters and commands.
This allows them to access the underlying Linux shell and run arbitrary OS commands with their account's privileges.

The Impact of CVE-2018-18555

Authenticated operator users can gain unauthorized access to the underlying Linux shell, compromising system security.

Technical Details of CVE-2018-18555

VyOS 1.1.8 vulnerability details and affected systems.

Vulnerability Description

The flaw in VyOS 1.1.8's sandboxing feature permits operators to escape the management shell and execute unauthorized OS commands.

Affected Systems and Versions

Product: VyOS 1.1.8
Vendor: N/A
Version: N/A

Exploitation Mechanism

Authenticated operator users exploit specific shell characters and commands to break out of the management shell and access the Linux shell.

Mitigation and Prevention

Steps to mitigate and prevent CVE-2018-18555.

Immediate Steps to Take

Upgrade VyOS to a patched version that addresses the sandbox escape vulnerability.
Monitor and restrict operator user access to prevent unauthorized shell escapes.

Long-Term Security Practices

Regularly review and update access control policies for operator users.
Conduct security training to educate users on safe shell usage practices.

Patching and Updates

Apply security patches promptly to address vulnerabilities like the sandbox escape issue in VyOS 1.1.8.