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Category:   Application (E-mail Server)  >   Sendmail Vendors:   Sendmail Consortium
Sendmail NULL Character Flaw in Common Name Field Lets Remote Users Spoof Certficiates
SecurityTracker Alert ID:  1023393
SecurityTracker URL:  http://securitytracker.com/id/1023393
CVE Reference:   CVE-2009-4565   (Links to External Site)
Updated:  Jan 5 2010
Original Entry Date:  Dec 31 2009
Impact:   Modification of authentication information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 8.14.4
Description:   A vulnerability was reported in Sendmail. A remote user can spoof certificates of arbitrary sites.

A remote user can create a certificate with a specially crafted Common Name field that contains a NULL character. Once the certificate is signed by a Certificate Authority, the certificate can be used to spoof a target site's certificate.

Impact:   A remote user can spoof certificates of arbitrary sites.
Solution:   The vendor has issued a fix (8.14.4).

The vendor's advisory is available at:

http://www.sendmail.org/releases/8.14.4

Vendor URL:  www.sendmail.org/releases/8.14.4 (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Mar 25 2010 (HP Issues Fix) Sendmail NULL Character Flaw in Common Name Field Lets Remote Users Spoof Certficiates
HP has issued a fix for HP-UX B.11.11, B.11.23, and B.11.31.
Mar 31 2010 (IBM Issues Fix) Sendmail NULL Character Flaw in Common Name Field Lets Remote Users Spoof Certficiates
IBM has issued a fix for AIX.
Apr 1 2010 (Red Hat Issues Fix) Sendmail NULL Character Flaw in Common Name Field Lets Remote Users Spoof Certficiates
Red Hat has issued a fix for Red Hat Enterprise Linux 5.
Jun 11 2010 (Sun Issues Fix) Sendmail NULL Character Flaw in Common Name Field Lets Remote Users Spoof Certficiates
Sun has issued a fix for Solaris 10 and OpenSolaris.
Feb 16 2011 (Red Hat Issues Fix) Sendmail NULL Character Flaw in Common Name Field Lets Remote Users Spoof Certficiates
Red Hat has issued a fix for Red Hat Enterprise Linux 4.
Jun 3 2014 (McAfee Issues Fix for McAfee Network Data Loss Prevention) Sendmail NULL Character Flaw in Common Name Field Lets Remote Users Spoof Certificates
McAfee has issued a fix for McAfee Network Data Loss Prevention.



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