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Category:   Application (E-mail Server)  >   Fetchmail Vendors:   fetchmail.berlios.de
Fetchmail APOP Authentication Weakness May Let Remote Users Determine the APOP Secret
SecurityTracker Alert ID:  1018008
SecurityTracker URL:  http://securitytracker.com/id/1018008
CVE Reference:   CVE-2007-1558   (Links to External Site)
Date:  May 7 2007
Impact:   Disclosure of authentication information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 6.3.8
Description:   A vulnerability was reported in Fetchmail. A remote user may be able to determine the APOP secret.

A remote server can send arbitrary text as an APOP challenge in response to a fetchmail POP3 client request. As a result, this may facilitate a man-in-the-middle attack to determine the APOP secret.

The vendor credits Gatan Leurent with reporting this vulnerability.

Impact:   A remote user may be able to conduct a man-in-the-middle attack to determine the APOP secret.
Solution:   The vendor has issued a fixed version (6.3.8).

The vendor indicates that APOP authentication should no longer be used.

The fetchmail advisory is available at:

http://fetchmail.berlios.de/fetchmail-SA-2007-01.txt

Vendor URL:  fetchmail.berlios.de/fetchmail-SA-2007-01.txt (Links to External Site)
Cause:   Authentication error
Underlying OS:   Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
May 17 2007 (Red Hat Issues Fix for Evolution) Fetchmail APOP Authentication Weakness May Let Remote Users Determine the APOP Secret   (bugzilla@redhat.com)
Red Hat has released a fix for GNOME Evolution on Red Hat Enterprise Linux.
May 24 2007 (Apple Issues Fix) Fetchmail APOP Authentication Weakness May Let Remote Users Determine the APOP Secret   (Apple Product Security <product-security-noreply@lists.apple.com>)
Apple has released a fix for Mac OS X.
May 30 2007 (Red Hat Issues Fix for evolution-data-server) Fetchmail APOP Authentication Weakness May Let Remote Users Determine the APOP Secret   (bugzilla@redhat.com)
Red Hat has released a fix for evolution-data-server on Red Hat Enterprise Linux 5.
May 31 2007 (Mozilla Issues Fix for Thunderbird) Fetchmail APOP Authentication Weakness May Let Remote Users Determine the APOP Secret
Mozilla has issued a fix for Thunderbird.
May 31 2007 (Mozilla Issues Fix for SeaMonkey) Fetchmail APOP Authentication Weakness May Let Remote Users Determine the APOP Secret
Mozilla has issued a fix for SeaMonkey.
May 31 2007 (Red Hat Issues Fix for SeaMonkey) Fetchmail APOP Authentication Weakness May Let Remote Users Determine the APOP Secret   (bugzilla@redhat.com)
Red Hat has released a fix for Mozilla SeaMonkey on Red Hat Enterprise Linux 2.1, 3, and 4.
May 31 2007 (Red Hat Issues Fix for Mozilla Thunderbird) Fetchmail APOP Authentication Weakness May Let Remote Users Determine the APOP Secret   (bugzilla@redhat.com)
Red Hat has released a fix for Mozilla Thunderbird on Red Hat Enterprise Linux 4 and 5.
Jun 7 2007 (Red Hat Issues Fix) Fetchmail APOP Authentication Weakness May Let Remote Users Determine the APOP Secret   (bugzilla@redhat.com)
Red Hat has released a fix for Red Hat Enterprise Linux 2.1, 3, 4, and 5.
Jul 2 2009 (Red Hat Issues Fix for Ruby) Fetchmail APOP Authentication Weakness May Let Remote Users Determine the APOP Secret   (bugzilla@redhat.com)
Red Hat has released a fix for Ruby for Red Hat Enterprise Linux 4 and 5.



 Source Message Contents

Date:  Mon, 7 May 2007 11:08:01 -0400
Subject:  Fetchmail


http://fetchmail.berlios.de/fetchmail-SA-2007-01.txt

CVE-2007-1558
 
 


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