CVE-2019-1614 : Exploit Details and Defense Strategies

A flaw in the NX-API feature of Cisco NX-OS Software allows a remote attacker with authenticated access to execute arbitrary commands using root privileges.

Understanding CVE-2019-1614

This CVE involves a vulnerability in Cisco NX-OS Software that could lead to command injection attacks.

What is CVE-2019-1614?

The vulnerability arises from improper validation of user-supplied data by the NX-API subsystem, potentially enabling attackers to execute arbitrary commands with root privileges.

The Impact of CVE-2019-1614

CVSS Score: 8.8 (High)
Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High

Technical Details of CVE-2019-1614

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows remote attackers to execute arbitrary commands with root privileges through a command-injection attack by sending malicious HTTP or HTTPS packets to the affected system's management interface.

Affected Systems and Versions

The following Cisco devices and software versions are affected:

MDS 9000 Series Multilayer Switches prior to 8.1(1b) and 8.2(3)
Nexus 3000 Series Switches prior to 7.0(3)I4(9) and 7.0(3)I7(4)
Nexus 3500 Platform Switches prior to 7.0(3)I7(4)
Nexus 2000, 5500, 5600, and 6000 Series Switches prior to 7.3(4)N1(1)
Nexus 9000 Series Switches in Standalone NX-OS Mode prior to 7.0(3)I4(9) and 7.0(3)I7(4)
Nexus 7000 and 7700 Series Switches prior to 7.3(3)D1(1) and 8.2(3)

Exploitation Mechanism

Exploiting this vulnerability involves sending malicious HTTP or HTTPS packets to the affected system's management interface, assuming the target system has enabled the NX-API feature.

Mitigation and Prevention

Steps to address and prevent the CVE-2019-1614 vulnerability.

Immediate Steps to Take

Disable NX-API if not required
Apply vendor-supplied patches
Monitor network traffic for signs of exploitation

Long-Term Security Practices

Regularly update and patch affected systems
Implement network segmentation and access controls
Conduct security training for staff

Patching and Updates

Ensure that affected systems are updated with the latest patches provided by Cisco.