CVE-2019-1725 : What You Need to Know

Cisco UCS B-Series Blade Servers Local Management CLI Arbitrary File Creation or CLI Parameter Injection Vulnerability

Understanding CVE-2019-1725

This CVE involves a security weakness in the implementation of certain commands on Cisco UCS B-Series Blade Servers when accessed through the local management CLI.

What is CVE-2019-1725?

The vulnerability allows an authenticated attacker with local access to the server to overwrite files on the server's disk or manipulate CLI command parameters not meant to be permitted for specific local management CLI commands.

The Impact of CVE-2019-1725

CVSS Base Score: 5.5 (Medium Severity)
Attack Vector: Local
Integrity Impact: High
Privileges Required: Low
Exploitation: Limited subset of local management CLI commands

Technical Details of CVE-2019-1725

The following technical details provide insight into the vulnerability.

Vulnerability Description

The vulnerability arises due to inadequate validation of user input for local management CLI commands, allowing unauthorized file overwriting or injection of disabled CLI command parameters.

Affected Systems and Versions

Affected Product: Cisco UCS B-Series Blade Server Software
Vendor: Cisco
Vulnerable Versions: Less than 4.0(2a)

Exploitation Mechanism

To exploit this vulnerability, the attacker needs to authenticate to the device and execute a specifically crafted version of a limited subset of local management CLI commands.

Mitigation and Prevention

Protect your systems from this vulnerability with the following steps.

Immediate Steps to Take

Update to software version 4.0(2a) or later to mitigate the vulnerability.
Monitor and restrict access to the local management CLI to authorized personnel only.

Long-Term Security Practices

Regularly review and update security policies and procedures.
Conduct security training for staff on best practices for system access and management.

Patching and Updates

Stay informed about security advisories and updates from Cisco.
Implement a robust patch management process to ensure timely application of security fixes.