CVE-2019-1893 : Security Advisory and Response

Cisco Enterprise NFV Infrastructure Software Command Injection Vulnerability

Understanding CVE-2019-1893

This CVE involves a security weakness in Cisco Enterprise NFV Infrastructure Software (NFVIS) that allows unauthorized command execution on the underlying OS by attackers with local access.

What is CVE-2019-1893?

The vulnerability stems from inadequate validation of user input within a configuration file accessible by a local shell user, enabling the execution of unauthorized commands with root privileges.

The Impact of CVE-2019-1893

CVSS Score: 7.8 (High Severity)
Attack Vector: Local
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High

Technical Details of CVE-2019-1893

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows attackers to execute arbitrary commands on the affected device's OS as root due to insufficient input validation in a configuration file.

Affected Systems and Versions

Product: Cisco Enterprise NFV Infrastructure Software
Vendor: Cisco
Affected Versions: < 3.10.1 (Custom Version)

Exploitation Mechanism

Attackers with local access can insert malicious input into the configuration file during execution to execute unauthorized commands on the underlying OS.

Mitigation and Prevention

Protect your systems from CVE-2019-1893 with the following steps:

Immediate Steps to Take

Implement access controls to restrict unauthorized access to configuration files.
Regularly monitor and audit user activities on the affected devices.

Long-Term Security Practices

Conduct regular security training for employees to raise awareness of potential vulnerabilities.
Keep systems up to date with the latest security patches and updates.

Patching and Updates

Apply patches provided by Cisco to address the vulnerability and enhance system security.