CVE-2018-0294 : Exploit Details and Defense Strategies

A vulnerability has been identified in both Cisco FXOS Software and Cisco NX-OS Software that could potentially enable a local attacker, who is already authenticated, to create an unauthorized administrator account on an affected device. This vulnerability impacts various Cisco products including Firepower 4100 Series Next-Generation Firewalls, Nexus switches, and UCS Fabric Interconnects.

Understanding CVE-2018-0294

This CVE refers to a vulnerability in Cisco FXOS and NX-OS Software that allows an authenticated attacker to create an unauthorized administrator account on affected devices.

What is CVE-2018-0294?

The vulnerability in Cisco FXOS and NX-OS Software allows an attacker to create an unauthorized admin account without a password, accessible only via SSH.

The Impact of CVE-2018-0294

An attacker could gain administrative privileges without leaving traces in logs or configurations.

Technical Details of CVE-2018-0294

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from the improper removal of sensitive files when certain CLI commands are used to clear device configurations and reload them.

Affected Systems and Versions

Cisco FXOS and NX-OS Software (versions unspecified)

Exploitation Mechanism

Attacker logs into the device as an admin user and creates an unauthorized account without a password.

Mitigation and Prevention

Protect your systems from this vulnerability with the following steps:

Immediate Steps to Take

Monitor for unauthorized account creation and SSH connections.
Implement strict access controls and regularly review administrative accounts.

Long-Term Security Practices

Conduct regular security training for staff on identifying and reporting suspicious activities.
Keep systems updated with the latest security patches.

Patching and Updates

Apply relevant patches provided by Cisco to address this vulnerability.