CVE-2019-6321 Explained : Impact and Mitigation

HP has identified a security vulnerability in certain versions of Workstation BIOS (UEFI Firmware) that could be exploited if the TPM (Trusted Platform Module) is deactivated. This weakness affects Workstations with the TPM disabled by default.

Understanding CVE-2019-6321

A security flaw detected by HP in specific versions of Workstation BIOS that could allow manipulation of the runtime BIOS code if the TPM is deactivated.

What is CVE-2019-6321?

The vulnerability affects Workstations with the TPM disabled as the default setting.

The Impact of CVE-2019-6321

Escalation of Privilege, Denial of Service, Information Disclosure, Loss of Confidentiality, Loss of Integrity may occur.

Technical Details of CVE-2019-6321

HP Z4 G4, Z6 G4, and Z8 G4 Workstations are affected by this vulnerability.

Vulnerability Description

The flaw allows for manipulation of the BIOS code if the TPM is deactivated.

Affected Systems and Versions

HP Z4 G4 Workstation (Xeon W) before version 1.70
HP Z4 G4 Workstation (Xeon W) (Linux) before version 1.70
HP Z4 G4 Core-X Workstation before version 1.70
HP Z4 G4 Core-X Workstation (Linux) before version 1.70
HP Z6 G4 Workstation before version 1.71
HP Z6 G4 Workstation (Linux) before version 1.71
HP Z8 G4 Workstation before version 1.71
HP Z8 G4 Workstation (Linux) before version 1.71

Exploitation Mechanism

The vulnerability can be exploited if the TPM is disabled, allowing unauthorized manipulation of the BIOS code.

Mitigation and Prevention

Immediate Steps to Take:

Enable TPM in the BIOS settings to prevent unauthorized code manipulation.
Update the BIOS to the latest version provided by HP. Long-Term Security Practices:
Regularly check for BIOS updates and apply them promptly.
Ensure the TPM is enabled on all Workstations to enhance security.
Implement secure boot mechanisms to prevent unauthorized firmware modifications.
Monitor for any suspicious activities that may indicate BIOS tampering.
Educate users on the importance of TPM and BIOS security.
Consider implementing additional security measures such as intrusion detection systems.
Collaborate with IT security professionals to enhance overall system security.
Stay informed about emerging vulnerabilities and best practices for BIOS security.
Regularly review and update security policies and procedures.
Conduct periodic security audits to identify and address potential vulnerabilities.

Patching and Updates

HP has released BIOS updates to address this vulnerability. Ensure all affected Workstations are updated to versions 1.70 and 1.71 accordingly.