Check Point Advisories

GNU Mailutils imap4d Format String (CVE-2005-1523)

Check Point Reference: CPAI-2005-254
Date Published: 8 Oct 2009
Severity: High
Last Updated: Thursday 08 October, 2009
Source:
Industry Reference:CVE-2005-1523
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 GNU Mailutils imap4d server is an implementation of the server side of the IMAP protocol. There exists a format string vulnerability in GNU mailutils Internet Message Access Protocol (IMAP) server. The flaw is caused by insufficient sanitization performed on user supplied IMAP commands. A remote user may exploit this issue to execute arbitrary code on the target system with the privileges of the IMAP service. In an unsuccessful code execution attack, the attacker's connection will terminate. All other connections are not affected. The functionality of the imap4d server as a whole is not affected. In an attack case where a malicious user is successful in injecting and executing code, the behaviour of the system is dependent on the nature of the injected code.

Protection Overview

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

  1. In the IPS tab, click Protections and find the GNU Mailutils imap4d Format String protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  IMAP Protocol Violation.
Attack Information:  GNU Mailutils imap4d format string

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