Vulnerability Note VU#717921

Hewlett-Packard printers and scanner devices allow remote unautheticated firmware updates

Original Release date: 08 Dec 2011 | Last revised: 02 Dec 2013


A vulnerability in certain Hewlett-Packard devices could allow a remote attacker to install unauthorized firmware on an affected system.


Certain Hewlett-Packard Printers and Hewlett-Packard Digital Senders products allow the device's firmware to be updated over the network. The firmware update process can be accomplished via port 9100/tcp and does not require authentication. As a result, a remote attacker could perform unauthorized modification of the device's firmware.

Hewlett-Packard notes that the remote firmware update feature is enabled by default on affected systems. The list of affected devices can be found in HP Security Bulletin HPSBPI02728 SSRT100692, and includes many varieties of the HP LaserJet and Color LaserJet products.


A remote unauthenticated attacker could install malicious firmware on an affected device. This malicious firmware could allow the attacker to take control of the affected device, gain access to sensitive information sent to or from the device, or cause a denial of service (e.g., through malfunction of the device).


Disable Remote Firmware Update

HP has published guidance about securely configuring printers, including instructions about disabling the firmware update feature, in "HP Imaging and Printing Security Best Practices - Configuring Security for Multiple LaserJet MFPs and Color LaserJet MFPs".

Users are encouraged to review this document and take the appropriate actions to disable the firmware update feature.

Vendor Information (Learn More)

VendorStatusDate NotifiedDate Updated
Hewlett-Packard CompanyAffected-08 Dec 2011
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C
Temporal 8.3 E:F/RL:OF/RC:C
Environmental 6.2 CDP:ND/TD:M/CR:ND/IR:ND/AR:ND



This document was written by Chad Dougherty.

Other Information

  • CVE IDs: CVE-2011-4161
  • Date Public: 29 Nov 2011
  • Date First Published: 08 Dec 2011
  • Date Last Updated: 02 Dec 2013
  • Document Revision: 11


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