CVE-2019-1735 : What You Need to Know

Cisco NX-OS Software Command Injection Vulnerability

Understanding CVE-2019-1735

This CVE involves a security flaw in Cisco NX-OS Software's Command Line Interface (CLI) that allows a local attacker with authenticated access to execute commands with elevated privileges on the device's operating system.

What is CVE-2019-1735?

The vulnerability arises from inadequate validation of arguments in specific CLI commands, enabling an attacker to insert malicious input as an argument for affected commands, leading to the execution of arbitrary commands with elevated privileges.

The Impact of CVE-2019-1735

The vulnerability has a CVSS base score of 4.4, indicating a medium severity issue. The attack complexity is low, requiring local access and low privileges, with confidentiality and integrity impacts rated as low.

Technical Details of CVE-2019-1735

Vulnerability Description

The flaw allows a local attacker to execute arbitrary commands with elevated privileges on the device's OS.

Affected Systems and Versions

Product: Cisco NX-OS Software
Versions Affected: Less than 8.3(1)

Exploitation Mechanism

Attacker with authenticated access inserts malicious input as an argument for specific CLI commands.

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-provided patches or updates promptly.
Monitor network for any suspicious activities.
Restrict access to affected devices.

Long-Term Security Practices

Regularly update and patch software and firmware.
Implement strong authentication mechanisms.
Conduct security training for users to prevent social engineering attacks.

Patching and Updates

Cisco has released patches to address this vulnerability.