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Category:   Application (Web Browser)  >   Mozilla Firefox Vendors:   Mozilla.org
Mozilla Firefox Javascript Regex Parsing Error Discloses Memory to Remote Users
SecurityTracker Alert ID:  1013635
SecurityTracker URL:  http://securitytracker.com/id/1013635
CVE Reference:   CVE-2005-0989   (Links to External Site)
Updated:  Apr 16 2005
Original Entry Date:  Apr 4 2005
Impact:   Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 1.0.2 and prior versions
Description:   A vulnerability was reported in Mozilla Firefox in Javascript regex parsing. A remote user can obtain portions of browser memory.

The browser's javascript implementation does not properly parse lamba list regular expressions.

The vulnerability resides in 'js/src/jsstr.c' in the find_replen() function.

A demonstration exploit is available at:

http://cubic.xfo.org.ru/firefox-bug/index.html

Azafran reported this vulnerability.

Impact:   A remote user can access random portions of browser memory.
Solution:   The vendor has issued a fix, available via CVS.
Vendor URL:  www.mozilla.org/products/firefox/ (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Apr 16 2005 (Vendor Issues Fix) Mozilla Firefox Javascript Regex Parsing Error Discloses Memory to Remote Users
The vendor has issued a fix.
Apr 22 2005 (Red Hat Issues Fix) Mozilla Firefox Javascript Regex Parsing Error Discloses Memory to Remote Users
Red Hat has released a fix.
Jul 21 2005 (Red Hat Issues Fix for Thunderbird) Mozilla Firefox Javascript Regex Parsing Error Discloses Memory to Remote Users
Red Hat has released a fix for Thunderbird, which is affected by these vulnerabilities.



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