Check Point Advisories

Mozilla Firefox Same Origin Violation And Local File Access (2015-78; CVE-2015-4495)

Check Point Reference: CPAI-2015-0958
Date Published: 10 Aug 2015
Severity: High
Last Updated: Monday 12 October, 2015
Source:
Industry Reference:CVE-2015-4495
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? Firefox 39.0.2 and below
Firefox ESR 38.1.0 and below
Firefox OS 2.1 and below
Vulnerability Description Same origin violation and local file access vulnerability has been reported in Mozilla Firefox. The vulnerability is due to the mechanism that enforces JavaScript context separation and Firefox's PDF Viewer. Successful exploitation of this vulnerability could allow an attacker to read and obtain sensitive local files on the victim's computer.

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 Mozilla Firefox Same Origin Violation And Local File Access (2015-78) 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:  Web Client Enforcement Violation.
Attack Information:  Mozilla Firefox Same Origin Violation And Local File Access (2015-78)

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