CVE-2019-1606 Explained : Impact and Mitigation

A weakness found in the Command Line Interface (CLI) of Cisco NX-OS Software allows a local attacker with authentication to run arbitrary commands on the affected device's operating system. This vulnerability stems from inadequate validation of arguments in specific CLI commands.

Understanding CVE-2019-1606

This CVE involves a vulnerability in Cisco NX-OS Software that could be exploited by authenticated local attackers to execute arbitrary commands on the device's underlying OS.

What is CVE-2019-1606?

The vulnerability in Cisco NX-OS Software CLI allows attackers to inject malicious input as arguments in vulnerable commands, potentially leading to the execution of arbitrary commands with elevated privileges.

The Impact of CVE-2019-1606

CVSS Base Score: 5.3 (Medium Severity)
Attack Vector: Local
Attack Complexity: Low
Privileges Required: Low
Confidentiality Impact: Low
Integrity Impact: Low
Availability Impact: Low

Technical Details of CVE-2019-1606

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows attackers to exploit insufficient validation of CLI command arguments, enabling them to execute arbitrary commands on the device's OS.

Affected Systems and Versions

Nexus 9000 Series Switches in Standalone NX-OS Mode (Versions less than 7.0(3)I7(4))
Nexus 3000 Series Switches (Versions less than 7.0(3)I7(4))
Nexus 3500 Platform Switches (Versions less than 7.0(3)I7(4))

Exploitation Mechanism

Attackers can leverage the lack of argument validation in specific CLI commands to inject malicious input, potentially gaining elevated privileges on the device's OS.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent exploitation of this vulnerability.

Immediate Steps to Take

Apply vendor-provided patches and updates promptly.
Monitor network traffic for any signs of exploitation.
Restrict access to vulnerable devices to authorized personnel only.

Long-Term Security Practices

Regularly update and patch all network devices.
Implement strong authentication mechanisms to prevent unauthorized access.
Conduct regular security audits and assessments to identify vulnerabilities.

Patching and Updates

Cisco has released patches to address this vulnerability. Ensure all affected devices are updated to versions equal to or greater than 7.0(3)I7(4).