full-disclosure - ZDI-10-128: Ipswitch Imail Server Queuemgr Format String Remote Code Execution Vulnerability

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Message-ID: <EE499D69B3D0714590B6FE9762B0461104BD3C38FE@emb01.unity.local>
Date: Thu, 15 Jul 2010 14:20:24 -0500
From: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
To: "'full-disclosure@...ts.grok.org.uk'" <full-disclosure@...ts.grok.org.uk>, 
	"'bugtraq@...urityfocus.com'" <bugtraq@...urityfocus.com>
Subject: ZDI-10-128: Ipswitch Imail Server Queuemgr Format
 String Remote Code Execution Vulnerability

ZDI-10-128: Ipswitch Imail Server Queuemgr Format String Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-128
July 15, 2010

-- CVSS:
10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)

-- Affected Vendors:
Ipswitch

-- Affected Products:
Ipswitch IMail

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 10001. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of IPSwitch IMail. Authentication is not
required to exploit this vulnerability.

The specific flaw exists within SMTPDLL.dll (called by queuemgr.exe).
When handling a message queued for remote delivery user supplied data
can be used to specify additional format specifiers to a vsprintf call.
This can be accomplished by providing a specially crafted -NOTIFY
argument to the SMTP "RCPT TO:" argument. Additionally, the destination
buffer supplied to vsprintf is a local stack buffer and can also be
overflowed with a large -NOTIFY argument. A remote attacker can exploit
this vulnerability to execute arbitrary code under the context of the
SYSTEM user.

-- Vendor Response:
Ipswitch states:
Update to the latest version 11.02

-- Disclosure Timeline:
2010-06-08 - Vulnerability reported to vendor
2010-07-15 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Anonymous

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents 
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

    http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

    http://www.zerodayinitiative.com/advisories/disclosure_policy/

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