CVE-2019-1784 : Exploit Details and Defense Strategies

Cisco NX-OS Software Command Injection Vulnerability allows attackers to run unrestricted commands on the underlying Linux OS with root privileges.

Understanding CVE-2019-1784

This CVE involves a weakness in Cisco NX-OS Software's CLI that enables attackers to execute arbitrary commands with escalated privileges.

What is CVE-2019-1784?

The vulnerability stems from inadequate validation of arguments in a specific CLI command, allowing attackers to insert malicious input and gain control over the Linux OS.

The Impact of CVE-2019-1784

Attack Complexity: Low
Attack Vector: Local
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Privileges Required: High
Scope: Unchanged
User Interaction: None
CVSS Base Score: 6.7 (Medium Severity)

Technical Details of CVE-2019-1784

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The flaw in Cisco NX-OS Software's CLI allows attackers with physical access to execute commands on the underlying Linux OS using root privileges.

Affected Systems and Versions

Product: Cisco NX-OS Software
Vendor: Cisco
Versions Affected: < 8.3(1)

Exploitation Mechanism

To exploit this vulnerability, attackers need to provide malicious input as an argument to a specific CLI command, requiring valid admin credentials.

Mitigation and Prevention

Protect your systems from CVE-2019-1784 with these security measures.

Immediate Steps to Take

Apply vendor-supplied patches promptly
Monitor network traffic for signs of exploitation
Restrict physical access to vulnerable devices

Long-Term Security Practices

Implement the principle of least privilege
Conduct regular security training for staff
Keep systems and software updated

Patching and Updates

Regularly check for security updates and patches from Cisco to address CVE-2019-1784.