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Category:   Application (E-mail Server)  >   Courier Mail Server Vendors:   Double Precision, Inc.
Courier Mail Server Error in Processing SPF Responses May Let Remote Users Deny Service
SecurityTracker Alert ID:  1014798
SecurityTracker URL:  http://securitytracker.com/id/1014798
CVE Reference:   CVE-2005-2151   (Links to External Site)
Date:  Aug 26 2005
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 0.50 and prior versions
Description:   A vulnerability was reported in Courier Mail Server. A user can cause memory corruption errors.

The software does not properly handle DNS failures when looking up Sender Policy Framework (SPF) records. A remote DNS server can send specially crafted responses to cause memory errors on the target system. As a result, denial of service conditions may occur.

The vulnerability resides in 'rfc1035/spf.c'.

Impact:   A remote user may be able to cause memory corruption errors on the target system.
Solution:   The vendor has issued a fixed version (0.51), available at:

http://www.courier-mta.org/status.html

Vendor URL:  www.courier-mta.org/ (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   None.


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