CVE-2019-1602 : Vulnerability Insights and Analysis

A weakness in the file system permissions of Cisco NX-OS Software has been discovered, potentially allowing a local attacker to gain unauthorized access to sensitive data and escalate privileges.

Understanding CVE-2019-1602

This CVE involves a vulnerability in Cisco NX-OS Software that could lead to privilege escalation for authenticated local attackers.

What is CVE-2019-1602?

The vulnerability arises from incorrect file system permissions implementation, enabling a local attacker to access sensitive data and potentially gain administrative control.

The Impact of CVE-2019-1602

CVSS Base Score: 7.8 (High Severity)
Attack Vector: Local
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Privileges Required: Low

Technical Details of CVE-2019-1602

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in Cisco NX-OS Software allows local attackers to exploit file system permissions, potentially leading to unauthorized access and privilege escalation.

Affected Systems and Versions

The following Cisco products are affected:

Nexus 3000 Series Switches (prior to version 7.0(3)I7(4))
Nexus 3500 Platform Switches (prior to version 7.0(3)I7(4))
Nexus 3600 Platform Switches (prior to version 7.0(3)F3(5))
Nexus 9000 Series Switches-Standalone (prior to version 7.0(3)I7(4))
Nexus 9500 R-Series Line Cards and Fabric Modules (prior to version 7.0(3)F3(5))

Exploitation Mechanism

Attackers can exploit this vulnerability by:

Logging into the CLI of a vulnerable device
Accessing a specific file to obtain information
Using the obtained data to authenticate to the NX-API server
Making configuration changes with administrator privileges if successful

Mitigation and Prevention

Protect your systems from CVE-2019-1602 with the following steps:

Immediate Steps to Take

Ensure NX-API feature is disabled by default
Monitor and restrict access to sensitive files
Implement strong authentication mechanisms

Long-Term Security Practices

Regularly update and patch Cisco NX-OS Software
Conduct security training for system administrators
Perform regular security audits and assessments

Patching and Updates

Apply the latest patches and updates provided by Cisco to address the vulnerability effectively.