Fetchmail APOP Authentication Weakness May Let Remote Users Determine the APOP Secret
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SecurityTracker Alert ID: 1018008
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SecurityTracker URL: http://securitytracker.com/id?1018008
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CVE Reference: CVE-2007-1558
(Links to External Site)
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Date: May 7 2007
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Impact: Disclosure of authentication information
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Fix Available: Yes
Vendor Confirmed: Yes
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Version(s): prior to 6.3.8
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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.
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Impact: A remote user may be able to conduct a man-in-the-middle attack to determine the APOP secret.
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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
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Vendor URL: fetchmail.berlios.de/fetchmail-SA-2007-01.txt (Links to External Site)
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Cause: Authentication error
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Underlying OS: Linux (Any), UNIX (Any)
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Message History:
This archive entry has one or more follow-up message(s) listed below.
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Source Message Contents
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Date: Mon, 7 May 2007 11:08:01 -0400
Subject: Fetchmail
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http://fetchmail.berlios.de/fetchmail-SA-2007-01.txt
CVE-2007-1558
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