Related Vulnerabilities: CVE-2019-9506

Certain HP printers are vulnerable to the Key Negotiation of Bluetooth (KNOB) attack. Data over Bluetooth can be intercepted, decrypted, and modified by an unauthorized local party.

Source

Potential Security Impact:

Disclosure and Modification of Information

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

Reported by: N/A

VULNERABILITY SUMMARY

Certain HP printers are vulnerable to the Key Negotiation of Bluetooth (KNOB) attack. Data over Bluetooth can be intercepted, decrypted, and modified by an unauthorized local party.

Reference Number

CVE-2019-9506, PSR-2019-0174

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.

Please refer to the RESOLUTION below for a list of potentially impacted products.

note:
All product versions are impacted prior to the firmware versions listed.

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-2019-9506	CVSS:3.0/ AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N	8.1 (High)

RESOLUTION

The below options highlight the devices affected by this vulnerability and remediation actions to take.

Firmware update

Update firmware for impacted printers as indicated in the table below.

Product name	Model number	Firmware revision
HP OfficeJet 200 Mobile Printer series	CZ993A L9B95A	1940A or later
HP OfficeJet 202 Mobile Printer	N4L14C N4K99C	1940A or later
HP OfficeJet 250 Mobile All-in-One Printer series	CZ992A L9D57A N4L17A	1940A or later
HP OfficeJet 252 Mobile All-in-One Printer	N4L16C N4L18C	1940A or later
HP Sprocket 200 Printer series	1AS85A - 1AS98A	1939A or later
HP Sprocket Select Photo Printer series	5XH49A - 5XH50A	1941A or later
HP Sprocket Studio series	3MP72A - 3MP74A 6SE08A 3XT68A	1942A or later

To obtain the updated firmware, read the section that matches your printer name.

Update the firmware for HP OfficeJet Mobile printers

Use the HP Smart app to check for and install printer firmware updates.

Go to 123.hp.com to install the app on your computer or mobile device.
After completing the printer setup, click or tap your printer name or icon.

note:
Menu names, locations, and available settings vary by printer model.
Under Advanced, select Advanced Settings, and then click or tap Tools.
Click or tap Printer Updates, and then select Firmware Updates.
Under Check for Printer Updates, click or tap Check Now. The HP Smart app checks for and updates any outdated firmware.

For more information about updating printer firmware, go to Updating or Upgrading Printer Firmware.

Update the firmware for HP Sprocket printers

Use the HP sprocket app to update the firmware for your Sprocket.

Make sure the Sprocket is on and your mobile device is connected to the Internet.
On your mobile device, open the HP sprocket app.
Tap the Menu icon , and then tap sprocket.
Tap Manage Printers, make sure your Sprocket is selected, and then tap Printer Settings.
Under the Status section, locate Battery.
- If the battery charge is 25% or higher, continue with these steps.
- If the battery charge is 24% or lower, charge the battery for at least 30 minutes, and then continue with these steps.
In Printer Settings, look for a firmware upgrade.
- If a firmware upgrade displays, tap Get Firmware Upgrade, and then follow the on-screen prompts to complete the update.
- If a firmware upgrade option does not display, the firmware is up-to-date.

Operating system update

For certain HP Sprocket models, mentioned in the table below, an operating system patch will need to be applied to remediate the issue. Please follow the instructions below from your device vendor (tablet or mobile device):

iPhone or iPad (iOS):

About the security content of iOS 12.4 (in English)
Update your iPhone, iPad, or iPod touch (in English)

Android devices: Android Security Bulletin - August 2019 (in English)

Product name	Model number
HP Sprocket Photo Printer	X7N07A - X7N08A Z3Z89A - Z3Z94A Z9L25A - Z9L29A 5DP49A 1BG86A 7CF16A
HP Sprocket 2-in-1 Printer	2FB96A - 2FB98A
HP Sprocket Plus Printer	2FR85A - 2FR87A

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: 4 December 2019 - Initial release.

SUPPORT COMMUNICATION- SECURITY BULLETIN HPSBPI03634 rev. 1 - HP OfficeJet Mobile and Sprocket Printers KNOB Vulnerability

Firmware update

Update the firmware for HP OfficeJet Mobile printers

Update the firmware for HP Sprocket printers

Operating system update

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