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Category:   Application (Web Browser)  >   Mozilla Firefox Vendors:   Mozilla.org
Mozilla Firefox Input Validation Hole in jar: Protocol Handler Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1018928
SecurityTracker URL:  http://securitytracker.com/id/1018928
CVE Reference:   CVE-2007-5947   (Links to External Site)
Updated:  Nov 27 2007
Original Entry Date:  Nov 9 2007
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  Exploit Included:  Yes  
Version(s): 2.0.0.9
Description:   A vulnerability was reported in Mozilla Firefox. A remote user can conduct cross-site scripting attacks.

The jar: protocol handler does not properly validate the MIME types of archive contents. A remote user can upload a specially crafted zip file (or certain other files). Then, when the target user loads a jar: URL that points to the zip file, arbitrary scripting code will be executed by the target user's browser. The code will originate from the site permitting the file upload and will run in the security context of that site. As a result, 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.

Jesse Ruderman, pdp, and beford.org separately reported this vulnerability.

The original reports are available at:

https://bugzilla.mozilla.org/show_bug.cgi?id=369814
http://www.gnucitizen.org/blog/web-mayhem-firefoxs-jar-protocol-issues

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with an arbitrary site that allows certain types of file uploads, 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:   The vendor has issued a fixed version (2.0.0.10).

The Mozilla advisory is available at:

http://www.mozilla.org/security/announce/2007/mfsa2007-37.html

Vendor URL:  www.mozilla.org/security/announce/2007/mfsa2007-37.html (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Nov 27 2007 (Red Hat Issues Fix) Mozilla Firefox Input Validation Hole in jar: Protocol Handler Permits Cross-Site Scripting Attacks
Red Hat has released a fix for Red Hat Enterprise Linux 4 and 5.
Nov 27 2007 (Red Hat Issues Fix for Seamonkey) Mozilla Firefox Input Validation Hole in jar: Protocol Handler Permits Cross-Site Scripting Attacks
Red Hat has released a fix for Seamonkey on Red Hat Enterprise Linux 2.1, 3, and 4.
Dec 19 2007 (Red Hat Issues Fix for Thunderbird) Mozilla Firefox Input Validation Hole in jar: Protocol Handler Permits Cross-Site Scripting Attacks
Red Hat has released a fix for Mozilla Thunderbird for Red Hat Enterprise Linux 4 and 5.



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