Check Point Advisories

Javascript Injection for Eval-based Unpackers

Vulnerability
Protection

Check Point Reference:	CPAI-2016-0933
Date Published:	26 Oct 2016
Severity:	High
Last Updated:	Thursday 10 November, 2016
Source:	Metasploit
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	js-beautify's P_A_C_K_E_R unpacker
Vulnerability Description	A code injection vulnerability exists in eval-based unpackers. The vulnerability is due to insufficient input validation. An attacker can generate a javascript file that executes arbitrary code when an eval-based unpacker is run on it.

Protection Overview

This protection detects 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 Javascript Injection for Eval-based Unpackers 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: Web Server Enforcement Violation.
Attack Information: Javascript Injection for Eval-based Unpackers