Check Point Advisories

Ipswitch IMail IMAP LOGIN Special Character Buffer Overflow (CVE-2005-1255)

Vulnerability
Protection

Check Point Reference:	CPAI-2005-248
Date Published:	8 Oct 2009
Severity:	High
Last Updated:	Thursday 08 October, 2009
Source:
Industry Reference:	CVE-2005-1255
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	The Internet Message Access Protocol (IMAP) specifies a protocol for the access and manipulation of electronic mail. The protocol permits the manipulation of mailboxes on a remote server and allows a remote client, among other operations, to create, delete, or rename mailboxes on the server side. The IMail IMAP server is an implementation of the server side of the IMAP protocol. There exists a vulnerability in the Ipswitch IMail IMAP server. The vulnerability is caused by insufficient boundary checking during the processing of the LOGIN command. By sending a crafted LOGIN command with username argument that is overly long and contains special characters, a remote attacker can overflow a stack buffer and execute arbitrary code on a vulnerable host with System level privileges. In a simple attack, aimed at creating a denial of service condition, the affected service IMail IMAP4 will terminate. If the service is not configured to restart automatically, then the IMail IMAP4 functionality will be unavailable until the server is restarted manually. In a more sophisticated attack scenario, where the malicious user is successful in injecting and executing supplied code, the behaviour of the system is dependent on the nature the injected code. Any code injected into the vulnerable component would execute in the security context of the service process, normally System.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

In the IPS tab, click Protections and find the Ipswitch IMail IMAP LOGIN Special Character Buffer Overflow protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: IMAP Protocol Violation.
Attack Information: Ipswitch IMail IMAP LOGIN special character buffer overflow