ISMail Vulnerabilities

Created 3/4/03

Impact

A remote attacker could execute arbitrary commands with Local System privileges.

Background

ISMail is a mail server for Windows platforms. It supports the ESMTP, POP3, and IMAP4 protocols.

The Problem

A buffer overflow in the processing of domain names in the MAIL FROM and RCPT TO commands could allow a remote attacker to execute arbitrary code or crash the service. Furthermore, a mail message which causes the mail service to crash in this manner will remain in the outgoing mail folder, causing the buffer overflow to occur again once the service is restarted. ISMail 1.2.5, 1.4.3, and possibly earlier versions are affected by this vulnerability.

Resolution

Upgrade to ISMail 1.4.5 or higher.

Where can I read more about this?

This vulnerability was reported in NGSSoftware Advisory #NISR27022003.