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Category:   Application (Generic)  >   PHP Vendors:   PHP Group
PHP Validation Flaw in utf8_decode() Permits Cross-Site Scripting Attacks and Lets Remote Users Inject SQL Commands
SecurityTracker Alert ID:  1024797
SecurityTracker URL:  http://securitytracker.com/id/1024797
CVE Reference:   CVE-2010-3870   (Links to External Site)
Date:  Nov 29 2010
Impact:   Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 5.3.3 and prior versions
Description:   A vulnerability was reported in PHP. A remote user can conduct cross-site scripting attacks. A remote user can inject SQL commands.

The utf8_decode() function does not properly handle certain specially crafted sequences in UTF-8 data. A remote user can exploit this to bypass SQL and cross-site scripting filters.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the PHP software, 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 remote user can execute SQL commands on the underlying database.

Solution:   The vendor has issued a source code fix [in October 2010].
Vendor URL:  www.php.net/ (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 30 2010 (Red Hat Issues Fix) PHP Validation Flaw in utf8_decode() Permits Cross-Site Scripting Attacks and Lets Remote Users Inject SQL Commands
Red Hat has issued a fix for Red Hat Enterprise Linux 4 and 5.
Feb 3 2011 (Red Hat Issues Fix) PHP Validation Flaw in utf8_decode() Permits Cross-Site Scripting Attacks and Lets Remote Users Inject SQL Commands
Red Hat has issued a fix for Red Hat Enterprise Linux 6.



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