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Category:   Application (Web Browser)  >   Mozilla Browser Vendors:
(HP Issues Fix for Tru64) Mozilla Event Handler Document Transition Flaw Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1009985
SecurityTracker URL:
CVE Reference:   CVE-2004-0191   (Links to External Site)
Date:  Apr 30 2004
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Affects versions prior to 1.6
Description:   A vulnerability was reported in the Mozilla browser in the processing of event handlers during the transition of documents. A remote user can conduct cross-site scripting attacks.

Andreas Sandblad reported that a remote user can create HTML containing a specially crafted link that, when loaded on the target user's browser, may execute arbitrary javascript events in the security context of the new page.

The flaw reportedly resides in 'nsDOMClassInfo.cpp' and occurs when a large number of event handlers are used within HTML tags.

A remote user can create specially crafted HTML that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser in the context of an arbitrary site in that site's security domain. The code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

A limited amount of user interaction may be required.

The vendor was reportedly notified on December 2, 2003.

The original bug report (containing some demonstration exploit HTML) is available at:

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with an arbitrary site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
Solution:   HP has issued a fix in Mozilla Application Suite for HP Tru64 UNIX V1.6, available at:

Vendor URL: (Links to External Site)
Cause:   Input validation error, State error
Underlying OS:  UNIX (Tru64)
Underlying OS Comments:  5.1A, 5.1B

Message History:   This archive entry is a follow-up to the message listed below.
Feb 25 2004 Mozilla Event Handler Document Transition Flaw Permits Cross-Site Scripting Attacks

 Source Message Contents

Subject:  HP Tru64 UNIX Mozilla Potential Denial of Service

Hash: SHA1



SSRT4722 rev. 0 HP Tru64 UNIX Mozilla Potential Denial of Service

  There are no restrictions for distribution of this Bulletin
  provided that it remains complete and intact.

  The information in this Security bulletin should be acted upon
  as soon as possible.

INITIAL RELEASE:    29 April 2004

POTENTIAL SECURITY IMPACT:    denial of service (DoS) or
                               unauthorized remote access

HP Software Security Response Team

REFERENCES:    CAN-2003-0564, CAN-2003-0594, CAN-2004-0191

Three potential security vulnerabilities have been identified in
the Mozilla Application Suite for HP Tru64 UNIX.  These potential
vulnerabilities could be remotely exploitable, resulting in denial
of service (DoS) or unauthorized access.

SUPPORTED SOFTWARE VERSIONS*:  ONLY impacted versions are listed.

Tru64 UNIX v5.1B PK3 (BL24)

Tru64 UNIX v5.1B PK2 (BL22)

Tru64 UNIX v5.1A PK6 (BL24)


The potential vulnerabilities have been corrected in the following
Mozilla version:

Mozilla Application Suite for HP Tru64 UNIX V1.6

(The Mozilla Application Suite for HP Tru64 UNIX is
provided for use on the supported base levels of
HP Tru64 UNIX V5.1A and V5.1B.)

V1.6 web kits can be downloaded from the following sites:

The Mozilla site:

The download site for HP Tru64 internet and networking software:
In addition, Mozilla V1.6 will be provided on the Associated
Product CD distributed with HP Tru64 UNIX 5.1B PK4 (BL25).

Please write to to request a PGP signed
version of this bulletin.

* The software product category that this Security Bulletin
  relates to is represented by the 5th and 6th characters of the
  Bulletin number: GN=General, MA=Management Agents, MI=Misc.
  3rd party, MP=HP-MPE/iX, NS=HP NonStop Servers, OV=HP OpenVMS,
  PI=HP Printing & Imaging, ST=HP Storage, TU=HP Tru64 UNIX,
  TL=Trusted Linux, UX=HP-UX, VV=Virtual Vault

SUPPORT: For further information, contact HP Services support

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REPORT: To report a potential security vulnerability with any HP
supported product, send Email to: It is
strongly recommended that security related information being
communicated to HP be encrypted using PGP, especially exploit
information. To obtain the security-alert PGP key please send an
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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."

(c)Copyright 2004 Hewlett-Packard Development Company, L.P.
Hewlett-Packard Company shall not be liable for technical or
editorial errors or omissions contained herein. The information
provided is provided "as is" without warranty of any kind. To the
extent permitted by law, neither HP or its affiliates,
subcontractors or suppliers will be liable for incidental, special
or consequential damages including downtime cost; lost profits;
damages relating to the procurement of substitute products or
services; or damages for loss of data, or software restoration.
The information in this document is subject to change without
notice. Hewlett-Packard Company and the names of Hewlett-Packard
products referenced herein are trademarks of Hewlett-Packard
Company in the United States and other countries. Other product
and company names mentioned herein may be trademarks of their
respective owners.

Version: PGP 8.0.2 - not licensed for commercial use:



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