HPSBHF03614 rev. 1 - Processor Registers Left Unlocked When TPM is Disabled

Potential Security Impact:

Escalation of Privilege, Denial of Service, Information Disclosure, Loss of Confidentiality, Loss of Integrity

Source: HP, HP Product Security Response Team (PSRT)

Reported By: HP Inc.

VULNERABILITY SUMMARY

HP has identified a security vulnerability with some versions of Workstation BIOS (UEFI Firmware) where the runtime BIOS code could be tampered with if the TPM is disabled. The impacted Workstations ship with TPM enabled by default, except in certain geographic regions where TPM is required to be disabled. This vulnerability was discovered during internal testing, and HP is not aware of any exploits linked to it.

Updated Workstation BIOS (UEFI Firmware) is available using the links in the RESOLUTION section below.

Reference Number

CVE-2019-6321, CVE-2019-6322, PSR-2019-0091

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.

See RESOLUTION section for impacted products.

BACKGROUND

For a PGP signed version of this security bulletin please write to: hp-security-alert@hp.com

CVSS 3.0 Base Metrics

Reference	Base Vector	Base Score
CVE-2019-6321	Geographic regions where TPM is required to be disabled: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	7.2
CVE-2019- 6322	Other systems: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H	6.8

RESOLUTION

HP has identified and released Workstation BIOS (UEFI Firmware) for the affected products. Versions greater than or equal to the Minimum Rev. do not have this vulnerability.

note:
HP recommends keeping your system up to date with the latest firmware and software.

Product Name	Minimum Rev.	Latest Rev.	SoftPaq #	SoftPaq Link
HP Z4 G4 Workstation (Xeon W)	1.70	1.75	SP95580	https://ftp.hp.com/pub/softpaq/sp95501-96000/sp95580.exe
HP Z4 G4 Workstation (Xeon W) (Linux)	1.70	1.75	SP95579	https://ftp.hp.com/pub/softpaq/sp95501-96000/sp95579.tgz
HP Z4 G4 Core-X Workstation	1.70	1.75	SP95582	https://ftp.hp.com/pub/softpaq/sp95501-96000/sp95582.exe
HP Z4 G4 Core-X Workstation (Linux)	1.70	1.75	SP95581	https://ftp.hp.com/pub/softpaq/sp95501-96000/sp95581.tgz
HP Z6 G4 Workstation	1.71	2.18	SP95578	https://ftp.hp.com/pub/softpaq/sp95501-96000/sp95578.exe
HP Z6 G4 Workstation (Linux)	1.71	2.18	SP95577	https://ftp.hp.com/pub/softpaq/sp95501-96000/sp95577.tgz
HP Z8 G4 Workstation	1.71	2.18	SP95578	https://ftp.hp.com/pub/softpaq/sp95501-96000/sp95578.exe
HP Z8 G4 Workstation (Linux)	1.71	2.18	SP95577	https://ftp.hp.com/pub/softpaq/sp95501-96000/sp95577.tgz

Third Party Security Patches: Third party security patches that are to be installed on systems running HP software products should be applied in accordance with the customer's patch management policy.

Support: For issues about implementing the recommendations of this Security Bulletin, visit https://www.hp.com/go/contacthp to learn about your HP support options.

Report: To report a potential security vulnerability with any HP supported product, send email to: hp-security-alert@hp.com.

Subscribe: To initiate a subscription to receive future HP Security Bulletin alerts via email, visit https://www.hp.com/go/alerts.

Security Bulletin Archive: To view released Security Bulletins, search the HP Support Site for "security bulletin".

Software Product Category: The Software Product Category is represented in the title by the two characters following HPSB.

PI	HP Printing and Imaging
HF	HP Hardware and Firmware
GN	HP General Software

It is strongly recommended that security related information being communicated to HP be encrypted using PGP, especially exploit information.

To get the security-alert PGP key, please send an e-mail message as follows:

To: hp-security-alert@hp.com

Subject: get key

System management and security procedures must be reviewed frequently to maintain system integrity. HP is continually reviewing and enhancing the security features of software products to provide customers with current secure solutions.

"HP is broadly distributing this Security Bulletin in order to bring to the attention of users of the affected HP products the important security information contained in this Bulletin. HP recommends that all users determine the applicability of this information to their individual situations and take appropriate action. HP does not warrant that this information is necessarily accurate or complete for all user situations and, consequently, HP will not be responsible for any damages resulting from user's use or disregard of the information provided in this Bulletin. To the extent permitted by law, HP disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose, title and non-infringement."

REVISION HISTORY : Version: 1 - 03 May 2019 Initial release.

SUPPORT COMMUNICATION- SECURITY BULLETIN

HPSBHF03614 rev. 1 - Processor Registers Left Unlocked When TPM is Disabled

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