CVE-2019-6159 : Exploit Details and Defense Strategies

Multiple firmware versions of the older IBM System x IMM (IMM v1) embedded Baseboard Management Controller (BMC) contain a security flaw known as stored cross-site scripting (XSS) vulnerability. This vulnerability could allow an unauthorized individual to store JavaScript code in the IMM log, which may be executed within the user's web browser.

Understanding CVE-2019-6159

This CVE involves a stored cross-site scripting vulnerability in various firmware versions of the legacy IBM System x IMM (IMM v1) BMC.

What is CVE-2019-6159?

The vulnerability allows an attacker to store and execute JavaScript code in the user's web browser through the IMM log.

The Impact of CVE-2019-6159

CVSS Base Score: 9.6 (Critical)
Attack Vector: Network
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Scope: Changed
User Interaction: Required
Privileges Required: None
Attack Complexity: Low

Technical Details of CVE-2019-6159

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The XSS vulnerability in IBM System x IMM (IMM v1) allows unauthorized users to execute JavaScript code in the user's browser.

Affected Systems and Versions

Affected Product: Legacy System x IMM (IMM v1) firmware
Vendor: IBM
Versions: Various

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: None
User Interaction: Required
Scope: Changed

Mitigation and Prevention

To address CVE-2019-6159, users can take the following steps:

Immediate Steps to Take

Restrict network access of the IMM web interface to trusted networks.
View IMM logs through an SSH session or the IMM web interface after disabling JavaScript in the web browser.
Send IMM logs to a log management system that does not render JavaScript.

Long-Term Security Practices

Regularly monitor and update firmware and security patches.
Educate users on safe browsing practices and potential security risks.

Patching and Updates

A patch will not be available for this vulnerability as IMM (IMM v1) is nearing end of support.