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Category:   Application (E-mail Server)  >   Sendmail Vendors:   Sendmail Consortium
(IBM Issues Fix for AIX) Sendmail May Crash When Processing Mail with a Long Header
SecurityTracker Alert ID:  1021237
SecurityTracker URL:  http://securitytracker.com/id/1021237
CVE Reference:   CVE-2006-4434   (Links to External Site)
Date:  Nov 17 2008
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 8.13.7 and prior versions
Description:   A vulnerability was reported in Sendmail. A remote user can cause denial of service conditions.

A remote user can send e-mail with specially crafted (and very long) header lines to trigger a "use-after-free" flaw and cause the target sendmail service to crash.

Moritz Jodeit reported this vulnerability.

[Editor's note: The vendor reported on August 9, 2006 that a potential "crash" had been corrected, but the vendor did not describe the nature of the crash. OpenBSD reported the security relevant nature of the crash on August 25, 2006.]

Impact:   A remote user can cause sendmail to crash.
Solution:   IBM has issued a fix for AIX.

APAR IZ25577:

http://www-912.ibm.com/eserver/support/fixes/fixcentral/pseriespkgoptions/apar?fixes=IZ25577

The IBM advisory is available at:

http://www-01.ibm.com/support/docview.wss?uid=isg1IZ25577

Vendor URL:  www.sendmail.org/releases/8.13.8.html (Links to External Site)
Cause:   State error
Underlying OS:  UNIX (AIX)
Underlying OS Comments:  6.1

Message History:   This archive entry is a follow-up to the message listed below.
Aug 25 2006 Sendmail May Crash When Processing Mail with a Long Header



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