CVE-2018-0293 : Security Advisory and Response

A vulnerability in the role-based access control (RBAC) feature for Cisco NX-OS Software could allow a remote attacker with valid user credentials to execute administrative CLI commands. This flaw affects various Cisco products and could lead to unauthorized configuration changes.

Understanding CVE-2018-0293

This CVE involves a vulnerability in RBAC for Cisco NX-OS Software that could be exploited by authenticated attackers to run restricted CLI commands.

What is CVE-2018-0293?

The vulnerability in the RBAC feature of Cisco NX-OS Software allows authenticated remote attackers to execute administrative CLI commands, potentially leading to unauthorized configuration changes.

The Impact of CVE-2018-0293

Attackers with valid user credentials can exploit this flaw to run commands reserved for administrative users
Unauthorized configuration modifications or boot image alterations on affected Cisco devices

Technical Details of CVE-2018-0293

This section provides detailed technical information about the vulnerability.

Vulnerability Description

Incorrect assignment of RBAC privileges for specific CLI commands
Exploitable by authenticating as a non-administrative user and executing restricted commands

Affected Systems and Versions

MDS 9000 Series Multilayer Switches
Nexus 2000, 3000, 3500, 3600, 5500, 5600, 6000, 7000, 7700, 9000 Series Switches
Nexus 9500 R-Series Line Cards and Fabric Modules

Exploitation Mechanism

Attacker authenticates as a non-administrative user
Executes specific commands via CLI to gain administrative privileges

Mitigation and Prevention

Steps to address and prevent the CVE-2018-0293 vulnerability.

Immediate Steps to Take

Apply vendor-supplied patches and updates
Monitor network for any unauthorized configuration changes
Restrict access to vulnerable devices

Long-Term Security Practices

Regularly review and update RBAC configurations
Implement strong password policies and multi-factor authentication

Patching and Updates

Cisco has released patches to address this vulnerability
Regularly check for and apply security updates from Cisco