CVE-2019-1608 : Security Advisory and Response

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

Understanding CVE-2019-1608

This CVE involves a command injection vulnerability in Cisco NX-OS Software that could be exploited by an attacker with valid administrator credentials.

What is CVE-2019-1608?

The vulnerability stems from inadequate validation of arguments in specific CLI commands, enabling an attacker to inject malicious input and run arbitrary commands with elevated privileges.

The Impact of CVE-2019-1608

The vulnerability has a CVSS base score of 4.2 (Medium severity) and requires high privileges for exploitation. No public exploits or malicious use have been reported.

Technical Details of CVE-2019-1608

The technical details of the vulnerability are as follows:

Vulnerability Description

Insufficient validation of CLI command arguments
Allows injection of malicious input
Enables execution of arbitrary commands with elevated privileges

Affected Systems and Versions

MDS 9000 Series Multilayer Switches prior to 6.2(27), 8.1(1b), and 8.3(1)
Nexus 7000 and 7700 Series Switches before 6.2(22), 7.3(3)D1(1), and 8.2(3)

Exploitation Mechanism

Attacker with authenticated access injects malicious input into vulnerable commands
Requires valid administrator credentials for successful exploitation

Mitigation and Prevention

To address CVE-2019-1608, consider the following steps:

Immediate Steps to Take

Apply vendor-provided patches and updates
Monitor network for any suspicious activity
Restrict access to vulnerable systems

Long-Term Security Practices

Regularly update and patch software and firmware
Implement least privilege access controls
Conduct security training and awareness programs

Patching and Updates

Cisco has released patches to address the vulnerability
Ensure timely application of security updates to mitigate risks