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Category:   Application (E-mail Server)  >   IMail Server Vendors:   Ipswitch
IPSwitch IMail Server Stack Overflow in Processing 'Reply-To' Headers Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1024215
SecurityTracker URL:
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Jul 16 2010
Impact:   Execution of arbitrary code via network, Root access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 11.02
Description:   A vulnerability was reported in IMail Server. A remote user can execute arbitrary code on the target system.

A remote user can send an e-mail with specially crafted 'Reply-To' header values to trigger a stack overflow in 'imailsrv.exe' and execute arbitrary code on the target system. The code will run with the privileges of the target service.

The vendor was notified on June 8, 2010.

An anonymous researcher reported one vulnerability via TippingPoint.

Impact:   A remote user can execute arbitrary code on the target system.
Solution:   The vendor has issued a fix (11.02).
Vendor URL: (Links to External Site)
Cause:   Boundary error
Underlying OS:  Windows (2000), Windows (2003)

Message History:   None.

 Source Message Contents

Subject:  [Full-disclosure] ZDI-10-126: Ipswitch Imail Server List Mailer Reply-To Address Remote Code Execution Vulnerability

ZDI-10-126: Ipswitch Imail Server List Mailer Reply-To Address Remote Code Execution Vulnerability
July 15, 2010

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

-- Affected Vendors:

-- Affected Products:
Ipswitch IMail

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 9999. 
For further product information on the TippingPoint IPS, visit:

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

The specific flaw exists within imailsrv.exe which is invoked to handle
messages sent to the imailsrv. When a message contains multiple
"Reply-To:" headers the imailsrv.exe process concatenates these into a
single fixed length buffer on the stack. No validation of the data or
data length is done. 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:

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
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