CVE-2019-1613 : Security Advisory and Response

A vulnerability in Cisco NX-OS Software's CLI allows a local, authenticated attacker to execute arbitrary commands on the affected device's operating system. The issue arises from inadequate validation of CLI command arguments.

Understanding CVE-2019-1613

This CVE involves a security vulnerability in Cisco NX-OS Software that could be exploited by a local attacker with valid credentials to run unauthorized commands on the system.

What is CVE-2019-1613?

The vulnerability in Cisco NX-OS Software's CLI enables a local attacker with valid credentials to execute arbitrary commands on the device's operating system by manipulating CLI command arguments.

The Impact of CVE-2019-1613

CVSS Base Score: 4.2 (Medium Severity)
Attack Vector: Local
Privileges Required: High
Confidentiality Impact: Low
Integrity Impact: Low
Availability Impact: Low

Technical Details of CVE-2019-1613

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows a local, authenticated attacker to execute arbitrary commands on the underlying operating system by exploiting insufficient validation of CLI command arguments.

Affected Systems and Versions

The following Cisco products and versions are affected:

MDS 9000 Series Multilayer Switches: Versions prior to 6.2(27) and 8.2(3)
Nexus 3000 Series Switches: Versions prior to 7.0(3)I4(9) and 7.0(3)I7(6)
Nexus 3500 Platform Switches: Versions prior to 6.0(2)A8(11) and 7.0(3)I7(6)
Nexus 3600 Platform Switches: Versions prior to 7.0(3)F3(5)
Nexus 9000 Series Switches in Standalone NX-OS Mode: Versions prior to 7.0(3)I4(9) and 7.0(3)I7(6)
Nexus 9500 R-Series Line Cards and Fabric Modules: Versions prior to 7.0(3)F3(5)
Nexus 7000 and 7700 Series Switches: Versions prior to 6.2(22) and 8.2(3)

Exploitation Mechanism

To exploit this vulnerability, an attacker needs valid administrator credentials to manipulate CLI command arguments and execute unauthorized commands on the device's operating system.

Mitigation and Prevention

Protect your systems from CVE-2019-1613 with the following steps:

Immediate Steps to Take

Apply vendor-released patches and updates promptly.
Monitor network traffic for any signs of exploitation.
Restrict access to vulnerable systems.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Implement strong password policies and multi-factor authentication.
Conduct regular security audits and assessments.

Patching and Updates

Cisco has released patches to address this vulnerability. Ensure all affected systems are updated with the latest software versions.