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Category:   Application (Web Browser)  >   Mozilla Firefox Vendors:   Mozilla.org
Mozilla Firefox Lets Remote Users Bypass the Add-on Installation Prompt on the Target System
SecurityTracker Alert ID:  1033396
SecurityTracker URL:  http://securitytracker.com/id/1033396
CVE Reference:   CVE-2015-4498   (Links to External Site)
Date:  Aug 27 2015
Impact:   Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 40.0.3
Description:   A vulnerability was reported in Mozilla Firefox. A remote user can bypass security controls on the target system.

A remote user can create specially crafted HTML containing a 'data:' URL that, when loaded by the target user, will bypass the add-on installation permission prompt. As a result, the target user may install an add-on from an untrusted location.

Bas Venis reported this vulnerability.

Impact:   A remote user can bypass the add-on installation permission prompt and cause the target user to install an add-on from an untrusted location.
Solution:   The vendor has issued a fix (40.0.3, ESR 38.2.1).

The vendor's advisory is available at:

https://www.mozilla.org/en-US/security/advisories/mfsa2015-95/

Vendor URL:  www.mozilla.org/en-US/security/advisories/mfsa2015-95/ (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Aug 27 2015 (Ubuntu Issues Fix) Mozilla Firefox Lets Remote Users Bypass the Add-on Installation Prompt on the Target System
Ubuntu has issued a fix for Ubuntu Linux 12.04 LTS, 14.04 LTS, and 15.04.
Aug 28 2015 (Red Hat Issues Fix) Mozilla Firefox Lets Remote Users Bypass the Add-on Installation Prompt on the Target System
Red Hat has issued a fix for Red Hat Enterprise Linux 5, 6, and 7.
Aug 28 2015 (CentOS Issues Fix) Mozilla Firefox Lets Remote Users Bypass the Add-on Installation Prompt on the Target System
CentOS has issued a fix for CentOS Linux 5, 6, and 7.
Aug 28 2015 (Oracle Issues Fix for Oracle Linux) Mozilla Firefox Lets Remote Users Bypass the Add-on Installation Prompt on the Target System
Oracle has issued a fix for Oracle Linux 5, 6, and 7.



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