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Category:   Application (Web Browser)  >   Mozilla Browser Vendors:
(HP Issues Fix for HP-UX) Mozilla Event Handler Document Transition Flaw Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1010120
SecurityTracker URL:
CVE Reference:   CVE-2004-0191   (Links to External Site)
Date:  May 11 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 fixed version of Mozilla (, available at:

Vendor URL: (Links to External Site)
Cause:   Input validation error, State error
Underlying OS:  UNIX (HP/UX)
Underlying OS Comments:  HP-UX 11.00, 11.11, 11.22

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:  SSRT4722 rev.0 HP-UX Mozilla denial of service



SSRT4722 rev.0 HP-UX Mozilla 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.

10 May 2004


denial of service,  unauthorized access

HP Software Security Response Team

CAN-2003-0564, CAN-2003-0594, CAN-2004-0191
Three potential security vulnerabilities have been identified in  Mozilla for HP-UX. 
These potential vulnerabilities could be remotely exploitable, resulting in denial of 
service (DoS) or unauthorized access.
SUPPORTED SOFTWARE VERSIONS*:  ONLY impacted versions are listed.
HP-UX B.11.00, B.11.11, B.11.22.


     Note: To determine if a system has an affected version,
            search the output of "swlist -a revision -l fileset"
            for an affected fileset.  Then determine if the
            recommended patch or update is installed.

      HP-UX B.11.22
      HP-UX B.11.11
      HP-UX B.11.00
      fix: install revision or subsequent


HP has made Mozilla version available from
Please write to to request a PGP signed version of this bulletin.
Upgrade to Mozilla or subsequent.

* 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

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The HP-UX Security Patch Matrix, updated daily, categorizes security patches by 
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For information on the Security Patch Check tool, see:

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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.

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