CVE-2018-0279 : Exploit Details and Defense Strategies

A flaw in the Secure Copy Protocol (SCP) server of Cisco Enterprise NFV Infrastructure Software (NFVIS) allows an authenticated attacker to access the Linux shell on the compromised device. This CVE affects Cisco devices running specific versions of NFVIS.

Understanding CVE-2018-0279

This CVE identifies a vulnerability in the SCP server of Cisco NFVIS that could lead to unauthorized access to the underlying Linux OS.

What is CVE-2018-0279?

The vulnerability arises from inadequate validation of command arguments in the SCP server of Cisco NFVIS, enabling an attacker to gain shell access on the affected device.

The Impact of CVE-2018-0279

If exploited, the attacker can access the Linux shell with a non-root account, potentially executing further attacks on the compromised system.

Technical Details of CVE-2018-0279

This section delves into the specifics of the vulnerability.

Vulnerability Description

The flaw allows an authenticated attacker to access the Linux shell on the compromised device by manipulating SCP server command arguments.

Affected Systems and Versions

Cisco devices running release 3.7.1, 3.6.3, or earlier versions of NFVIS
Access to the SCP server must be permitted on the affected device

Exploitation Mechanism

Crafted arguments during connection establishment enable the attacker to exploit the vulnerability

Mitigation and Prevention

Protecting systems from CVE-2018-0279 is crucial for maintaining security.

Immediate Steps to Take

Disable access to the SCP server if not required
Implement firewall rules to restrict SCP server access

Long-Term Security Practices

Regularly monitor and update NFVIS software
Conduct security audits to identify vulnerabilities

Patching and Updates

Apply patches provided by Cisco to address the SCP server vulnerability