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Category:   Application (Generic)  >   PHP Vendors:   PHP Group
PHP mb_send_mail() May Let Users Inject SMTP Headers
SecurityTracker Alert ID:  1015296
SecurityTracker URL:
CVE Reference:   CVE-2005-3883   (Links to External Site)
Date:  Nov 30 2005
Impact:   Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 5.1.1
Description:   A vulnerability was reported in PHP in the mb_send_mail() function. A user may be able to inject SMTP headers.

The mb_send_mail() function does not properly validate user supplied input in the 'To' header when sending mail. A user of an application that invokes this function may be able to supply a specially crafted 'To' value to inject arbitrary headers into an outgoing e-mail message.

This may facilitate the sending of SPAM.

The vulnerability resides in 'ext/mbstring/mbstring.c'.

s.masugata at dot jp reported this vulnerability.

Impact:   A user may be able to inject SMTP headers to, for example, send SPAM via an affected application.
Solution:   The vendor has issued a fixed version (5.1.1), available at:

Vendor URL: (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.
Apr 26 2006 (Red Hat Issues Fix) PHP mb_send_mail() May Let Users Inject SMTP Headers
Red Hat has released a fix for Red Hat Enterprise Linux 3 and 4.

 Source Message Contents

[Original Message Not Available for Viewing]

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