CVE-2019-1612 : Vulnerability Insights and Analysis

A vulnerability in the CLI of Cisco NX-OS Software allows an authenticated, local attacker to execute arbitrary commands on the underlying operating system of affected devices.

Understanding CVE-2019-1612

This CVE involves a command injection vulnerability in Cisco NX-OS Software, potentially granting attackers elevated privileges.

What is CVE-2019-1612?

The vulnerability arises from inadequate validation of arguments in certain CLI commands, enabling attackers to execute arbitrary commands with elevated privileges on the underlying OS.

The Impact of CVE-2019-1612

Attack Complexity: Low
Attack Vector: Local
Base Score: 4.2 (Medium)
Privileges Required: High
Scope: Unchanged
User Interaction: None
Confidentiality, Integrity, and Availability Impact: Low

Technical Details of CVE-2019-1612

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability allows authenticated local attackers to execute arbitrary commands on affected devices' operating systems by exploiting insufficient validation of CLI command arguments.

Affected Systems and Versions

Nexus 3000 Series Switches: < 7.0(3)I4(9) and < 7.0(3)I7(4)
Nexus 3500 Platform Switches: < 7.0(3)I7(4)
Nexus 3600 Platform Switches: < 7.0(3)F3(5)
Nexus 9000 Series Switches: < 7.0(3)I4(9) and < 7.0(3)I7(4)
Nexus 9500 R-Series Line Cards and Fabric Modules: < 7.0(3)F3(5)

Exploitation Mechanism

Attackers exploit the vulnerability by injecting malicious input as arguments in affected CLI commands, requiring valid administrator credentials for successful exploitation.

Mitigation and Prevention

Protecting systems from CVE-2019-1612 is crucial for maintaining security.

Immediate Steps to Take

Apply vendor-provided patches promptly
Monitor network for any suspicious activities
Restrict access to vulnerable systems

Long-Term Security Practices

Regularly update and patch systems
Implement least privilege access controls
Conduct security training for staff

Patching and Updates

Regularly check for security advisories and apply patches provided by Cisco to mitigate the vulnerability.