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Category:   Application (E-mail Server)  >   Sendmail Vendors:   Sendmail Consortium
(IBM Issues Fix) Sendmail NULL Character Flaw in Common Name Field Lets Remote Users Spoof Certficiates
SecurityTracker Alert ID:  1023777
SecurityTracker URL:  http://securitytracker.com/id/1023777
CVE Reference:   CVE-2009-4565   (Links to External Site)
Date:  Mar 31 2010
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:   IBM has issued efixes, available at:

http://aix.software.ibm.com/aix/efixes/security/sendmail_fix.tar

The IBM advisory is available at:

http://aix.software.ibm.com/aix/efixes/security/sendmail_advisory.asc

Vendor URL:  www.sendmail.org/releases/8.14.4 (Links to External Site)
Cause:   Input validation error
Underlying OS:  UNIX (AIX)
Underlying OS Comments:  5.3, 6.1

Message History:   This archive entry is a follow-up to the message listed below.
Dec 31 2009 Sendmail NULL Character Flaw in Common Name Field Lets Remote Users Spoof Certficiates



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