Check Point Advisories

FlashGet FTP PWD Command Stack Buffer Overflow (CVE-2008-4321)

Vulnerability
Protection

Check Point Reference:	CPAI-2008-331
Date Published:	11 Oct 2009
Severity:	High
Last Updated:	Sunday 11 October, 2009
Source:
Industry Reference:	CVE-2008-4321
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	FlashGet is a download manager application. It uses multi-threading technique in the downloading transaction. The FlashGet supports various protocols such as FTP and HTTP. A buffer overflow vulnerability exists in FlashGet. The vulnerability is caused by insufficient boundary checking. An attacker could exploit this vulnerability by enticing a user to an FTP server that sends specially crafted PWD command responses to the FlashGet application, potentially leading to injection and execution of arbitrary code in the security context of the target system's logged in user. An attack targeting this vulnerability can result in the injection and execution of arbitrary code. If code execution is successful, the behaviour of the target will depend on the intention of the attacker. Any injected code will be executed within the security context of the currently logged in user. In the case of an unsuccessful code execution attack, the affected application will terminate abnormally.

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 FlashGet FTP PWD Command Stack 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: FTP Enforcement Violation.
Attack Information: FlashGet FTP PWD command stack buffer overflow