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Document ID: c01039261

Version: 3

HPSBPI01085 SSRT4840 rev.3 - HP LaserJet, Remote Denial of Service (DoS)

Notice: The information in this security bulletin should be acted upon as soon as possible.

Release date : 27-Apr-2007

Last updated : 13-Jul-2017

Potential Security Impact:
Remote Denial of Service (DoS)

A potential security vulnerability has been identified with the remote upgrade capability of Laserjet printers. This vulnerability could be exploited remotely to create a Denial of Service (DoS).
Reference Number
CVE-2004-2439, BID 11297
SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
HP Color LaserJet 2500, Business InkJet 3000, LaserJet 3700, LaserJet 4100mfp, LaserJet 4200, LaserJet 4300, Color LaserJet 4600, Color LaserJet 4650, Color LaserJet 5500, Color LaserJet 5550, LaserJet 9000, LaserJet 9000mfp, LaserJet 9040mfp, LaserJet 9050, LaserJet 9050mfp, LaserJet 9055, LaserJet 9065, Color LaserJet 9500, Color LaserJet 9500mfp.
This is a reformatted version of Security Bulletin HPSBPI01085 SSRT4840 rev.0.
By default the remote upgrade capability of HP Laserjet printers allows firmware upgrades without requiring a password. This could be exploited to download malicious firmware which could result in a denial of service.
The following procedure can be used to avoid the vulnerability:
1. Using the techniques described here, securely configure the networked printer:
2. Disable the upgrade capability of the printer via SNMP, setting the remote-upgrade-enable object to an integer value of 1:

remote-upgrade-enable OBJECT-TYPE
ACCESS read-write
STATUS mandatory
DESCRIPTION "Enables or disables the ability to upgrade the firmware associated with any device that is available to be upgraded. "
::= { upgradable-devices 8 }
Note: To perform an upgrade of the printer, this object must be set to an integer value of 2. After the upgrade the object should be set to an integer value of 1 to disable the upgrade capability.
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 to learn about your HP support options.
Report: To report a potential security vulnerability with any HP supported product, send email to:
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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.
HP Printing and Imaging
HP Hardware and Firmware
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:
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 : Revision: 0 (rev.0) - 13 October 2004 Initial release; Version: 1 (rev.1) - Skipped for formatting reasons; Version: 2 (rev.2) - 3 May 2007 Reformatted; Version: 3 (rev.3) - 17 July 2017 Fixed broken link. Added boilerplate reuse c05565415

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