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Ipswitch IMail Server 2006 Multiple IMAP Buffer Overflow Vulnerabilities



Ipswitch Inc.'s IMail Server is an e-mail server aimed at providing easily configured and maintained e-mail services for small organizations. More information is available on the vendor's site at the following URL.



Remote exploitation of multiple buffer overflow vulnerabilities in Ipswitch Inc.'s IMail Server 2006 could allow attackers to execute arbitrary code.

IMail includes an IMAP daemon that users can use to access their email. The "Search" IMAP command contains an exploitable stack-based buffer overflow vulnerability. Additionally, the "Search charset" contains an exploitable heap-based buffer overflow vulnerability.


Exploitation allows an attacker to execute arbitrary code with SYSTEM privileges.

In order to exploit these issues, an attacker would need to login to a vulnerable IMail IMAP Server using valid credentials.

The vulnerable component is installed with any IPSwitch product that includes the IMail Server. This includes products such as its Collaboration Suite packages.


iDefense has confirmed the existence of these vulnerabilities in IMail Server 2006. The vulnerable executable used was version of imapd32.exe.


Disabling the IMAP service prevents exploitation of these vulnerabilities. Consider enabling POP3 or webmail as an alternative to IMAP.


Ipswitch Inc. has released version 2006.21 of its IMail product to address these vulnerabilities. More information can be found at the following URL.



A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not been assigned yet.


02/13/2007 Initial vendor notification
07/17/2007 Initial vendor response
07/18/2007 Coordinated public disclosure


The stack-based buffer overflow vulnerability was reported to iDefense by Manuel Santamarina Suarez. The heap-based buffer overflow discoverer wishes to remain anonymous.

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Copyright © 2007 Verisign, Inc.

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