HP urges LaserJet users to patch printers

Attackers can access printed documents by exploiting Web interface.

Hewlett-Packard has warned owners of some of its laser printers to update their devices' firmware or risk having remote attackers access previously-printed documents.

In an advisory published Wednesday, HP said that users of certain LaserJet, Color LaserJet and Digital Sender models are affected, and urged them to immediately download and install firmware upgrades.

The devices include 10 different LaserJet models -- ranging from the 2410 to the 9050 -- two Color LaserJet models and the 9200C Digital Sender, a sheet-fed document scanner.

According to Digital Defense, the security company that reported the problem to HP last October, attackers can exploit a bug in the printers' Web-based control interface to "read arbitrary system configuration files, cached documents, etc."

Exploiting the vulnerability, the Digital Defense researchers said, is "trivial" with common Web server "directory traversal" tactics. A directory transversal attack is an HTTP-based exploit that lets attackers access restricted directories, and execute commands outside of the server's root directory.

Adrien de Beaupre, an analyst with the SANS Institute's Internet Storm Center (ISC), added his voice to the call for patching printers. "The impact might not seem severe, as in the attacker can view the printer configuration; however, viewing cached versions of printed documents can be," said de Beaupre in an alert on the ISC site Friday.

Other than patching, the only other defensive measure available is to disable access to the printers' online control interface, de Beaupre added.

HP listed the affected printers in a security bulletin , which also included instructions on how to download the firmware update.

Join the Good Gear Guide newsletter!

Error: Please check your email address.

Tags HP

Our Back to Business guide highlights the best products for you to boost your productivity at home, on the road, at the office, or in the classroom.

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Gregg Keizer

Show Comments

Most Popular Reviews

Deals on Good Gear Guide

Deals on Good Gear Guide


Latest News Articles


GGG Evaluation Team

Kathy Cassidy


First impression on unpacking the Q702 test unit was the solid feel and clean, minimalist styling.

Anthony Grifoni


For work use, Microsoft Word and Excel programs pre-installed on the device are adequate for preparing short documents.

Steph Mundell


The Fujitsu LifeBook UH574 allowed for great mobility without being obnoxiously heavy or clunky. Its twelve hours of battery life did not disappoint.

Andrew Mitsi


The screen was particularly good. It is bright and visible from most angles, however heat is an issue, particularly around the Windows button on the front, and on the back where the battery housing is located.

Simon Harriott


My first impression after unboxing the Q702 is that it is a nice looking unit. Styling is somewhat minimalist but very effective. The tablet part, once detached, has a nice weight, and no buttons or switches are located in awkward or intrusive positions.


Latest Jobs


Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?