Related Vulnerabilities: CVE-2018-5407

An industry-wide vulnerability has been reported which impacts CPUs that use Simultaneous Multithreading Technology (SMT). The attack consists of running a malicious process in parallel with legitimate processes using the parallel threading capabilities of SMT. The legitimate process leaks small amounts of data to the malicious processes, which could allow an attacker to reconstruct the data that was inside the legitimate process.

Source

Potential Security Impact:

Information disclosure.

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

Reported By: Tampere University of Technology, Finland and Technical University, Cuba

VULNERABILITY SUMMARY

Reference Number

CVE-2018-5407, PSR-2018-0246

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-2018-5407	AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N	4.7

RESOLUTION

HP worked with industry partners to analyze the researcher’s findings. Software written using safe algorithms to prevent side channel analysis are not vulnerable to the researchers’ methods. The firmware shipped on HP platforms is not vulnerable to this issue; there will not be any firmware updates published with this security bulletin.

Additional Resources:

AMD article on PortSmash mitigations (in English)

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 - 2 November 2018 Initial release. Version: 2 - 30 November 2018 Updated Resolution section. Version: 3 - 7 January 2019 Updated CVE resolution information, Resolution section.

SUPPORT COMMUNICATION- SECURITY BULLETIN HPSBHF03597 rev. 3 - PortSmash Side-Channel Vulnerability

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