Check Point Advisories

Yahoo Messenger YMailAttach ActiveX Control Buffer Overflow (CVE-2006-6603)

Check Point Reference: CPAI-2006-314
Date Published: 22 Feb 2010
Severity: Medium
Last Updated: Monday 22 February, 2010
Source:
Industry Reference:CVE-2006-6603
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Yahoo! Messenger is a instant messaging communicating application developed by Yahoo! Inc. When a user registers a Yahoo! user account, it is bundled with the Yahoo! Mail service, which is a web-based email service. Users can use a web browser to read, send and maintain their email messages. The vendor has developed a set of web browser plugins that assist the user in using the Yahoo! Mail service. Note that the usage of this ActiveX control is optional and users can operate their web mail account normally without it. These plugins are usually installed along with the Yahoo! Messenger distribution, under the component group "browser services". There exists a buffer overflow vulnerability in Yahoo! Messenger. The vulnerability is caused due to improper usage of the the YMailAttack ActiveX control. A remote attacker may leverage this vulnerability to inject and execute arbitrary code on the target host, in the context of the currently logged in user. In an attack case where code injection is not successful, the affected application will terminate abnormally. In a more sophisticated attack where code injection is successful, the behaviour of the target host is entirely dependent on the intended function of the injected code. The code in such a case would execute within the security context of the currently logged in user.

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

  1. In the IPS tab, click Protections and find the Yahoo Messenger YMailAttach ActiveX Control Buffer Overflow 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:  Instant Messenger.
Attack Information:  Yahoo Messenger YMailAttach ActiveX Control Buffer Overflow

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