WinGate IMAP Service Lets Remote Authenticated Users Deny Service
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SecurityTracker Alert ID: 1020644
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SecurityTracker URL: http://securitytracker.com/id?1020644
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CVE Reference: CVE-2008-3606
(Links to External Site)
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Updated: Aug 15 2008
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Original Entry Date: Aug 8 2008
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Impact: Denial of service via network
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Exploit Included: Yes
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Version(s): 6.2.2
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Description: A vulnerability was reported in WinGate. A remote authenticated user can cause denial of service conditions.
A remote authenticated user can send a specially crafted LIST command to cause the target service to prevent additional IMAP connections.
A
demonstration exploit is provided:
A01 LOGIN <user> <password>
A02 LIST Ax1000 *
The vendor has been notified.
Joao Antunes
reported this vulnerability.
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Impact: A remote authenticated user can prevent the target IMAP service from accepting IMAP connections.
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Solution: No solution was available at the time of this entry.
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Vendor URL: www.wingate.com/ (Links to External Site)
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Cause: Resource error
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Underlying OS: Windows (Any)
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Reported By: Joao Antunes <jantunes@di.fc.ul.pt>
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Message History:
None.
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Source Message Contents
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Date: Fri, 8 Aug 2008 15:16:08 +0100
From: =?ISO-8859-1?Q?Jo=E3o_Antunes?= <jantunes@di.fc.ul.pt>
Subject: [AJECT] WinGate Email Server (IMAP) vulnerability
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Synopsis
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WinGate is vulnerable to denial-of-service (DoS) attacks caused
probably by a resource exhaustion vulnerability.
The IMAP server ceases to provide access to its clients after
processing a LIST command with a large parameter (see details bellow).
Product: WinGate
Version: 6.2.2 and probably the older versions
Vendor: Qbik (www.wingate.com)
Type: Denial-of-service
Risk: service disruption
Remote: Yes
Discovered by: Joćo Antunes (AJECT -- Attack Injection Tool) on 14/May/
2008
Exploit: Not Available
Solution: Not Available
Status: Developers were contacted several times since the
vulnerability was discovered.
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Vulnerability Description
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The vulnerability can be triggered by sending the following messages
to the imap server:
A01 LOGIN <user> <password>
A02 LIST Ax1000 *
Depending on the server's resources, it may be required to repeat the
above exploit to deplete its resources. (in a 512MB RAM configuration,
the exploit was executed twice)
The above exploit caused the server to reject all subsequent
connections with a "NO access denied" reply thus resulting in a remote
denial of service.
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