CVE-2019-1894 : Exploit Details and Defense Strategies

Cisco Enterprise NFV Infrastructure Software Arbitrary File Read and Write Vulnerability

Understanding CVE-2019-1894

This CVE involves a vulnerability in Cisco Enterprise NFV Infrastructure Software (NFVIS) that could allow an authenticated, remote attacker to modify or access arbitrary files on the underlying operating system of an affected device.

What is CVE-2019-1894?

The vulnerability stems from inadequate validation of inputs in the filesystem commands of NFVIS.
An attacker could exploit this by using manipulated variables during the execution of a specific command.
Successful exploitation could grant the attacker the ability to modify or access arbitrary files on the underlying OS.

The Impact of CVE-2019-1894

CVSS Score: 7.2 (High Severity)
Attack Vector: Network
Confidentiality, Integrity, and Availability Impact: High
Privileges Required: High
Scope: Unchanged
This vulnerability has the potential to cause significant harm by allowing unauthorized access to critical system files.

Technical Details of CVE-2019-1894

This section provides more in-depth technical information about the vulnerability.

Vulnerability Description

The vulnerability allows an attacker to overwrite or read arbitrary files on the underlying OS of the affected device.
It is caused by improper input validation in NFVIS filesystem commands.

Affected Systems and Versions

Affected Product: Cisco Enterprise NFV Infrastructure Software
Vendor: Cisco
Vulnerable Versions: Less than 3.10.1 (unspecified version type)

Exploitation Mechanism

Attackers can exploit this vulnerability by using crafted variables during the execution of a specific command.

Mitigation and Prevention

Protecting systems from CVE-2019-1894 requires immediate action and long-term security practices.

Immediate Steps to Take

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

Long-Term Security Practices

Regularly update and patch all software and systems.
Implement strong access controls and authentication mechanisms.
Conduct regular security audits and assessments.

Patching and Updates

Cisco has likely released patches to address this vulnerability. Ensure that all affected systems are updated with the latest security fixes.