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Category:   Application (Web Browser)  >   Mozilla Firefox Vendors:   Mozilla.org
(Red Hat Issues Fix) Mozilla Firefox PDF Viewer Same-Origin Bypass Lets Remote Users Obtain Potentially Sensitive Information on the Target System
SecurityTracker Alert ID:  1033220
SecurityTracker URL:  http://securitytracker.com/id/1033220
CVE Reference:   CVE-2015-4495   (Links to External Site)
Date:  Aug 8 2015
Impact:   Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 39.0.3
Description:   A vulnerability was reported in Mozilla Firefox. A remote user can obtain files from the target user's system.

A remote user can create specially crafted content that, when loaded by the target user, will bypass same-origin policy and inject arbitrary JavaScript into the built-in PDF Viewer in the local file context and gain access to files on the target user's system with the privileges of the target user.

This vulnerability is being actively exploited.

Cody Crews reported this vulnerability.

Impact:   A remote user can obtain files on the target user's system.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2015-1581.html

Vendor URL:  rhn.redhat.com/errata/RHSA-2015-1581.html (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  5, 6, 7

Message History:   This archive entry is a follow-up to the message listed below.
Aug 7 2015 Mozilla Firefox PDF Viewer Same-Origin Bypass Lets Remote Users Obtain Potentially Sensitive Information on the Target System



 Source Message Contents

Subject:  [RHSA-2015:1581-01] Important: firefox security update

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: firefox security update
Advisory ID:       RHSA-2015:1581-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2015-1581.html
Issue date:        2015-08-07
CVE Names:         CVE-2015-4495 
=====================================================================

1. Summary:

Updated firefox packages that fix one security issue are now available for
Red Hat Enterprise Linux 5, 6, and 7.

Red Hat Product Security has rated this update as having Important security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux (v. 5 server) - i386, ppc, s390x, x86_64
Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

Mozilla Firefox is an open source web browser. XULRunner provides the XUL
Runtime environment for Mozilla Firefox.

A flaw was discovered in Mozilla Firefox that could be used to violate the
same-origin policy and inject web script into a non-privileged part of the
built-in PDF file viewer (PDF.js). An attacker could create a malicious web
page that, when viewed by a victim, could steal arbitrary files (including
private SSH keys, the /etc/passwd file, and other potentially sensitive
files) from the system running Firefox. (CVE-2015-4495)

Red Hat would like to thank the Mozilla project for reporting this issue.
Upstream acknowledges Cody Crews as the original reporter.

All Firefox users should upgrade to these updated packages, which contain
Firefox version 38.1.1 ESR, which corrects this issue. After installing the
update, Firefox must be restarted for the changes to take effect.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1251318 - CVE-2015-4495 Mozilla: Same origin violation and local file stealing via PDF reader (MFSA 2015-78)

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
firefox-38.1.1-1.el5_11.src.rpm

i386:
firefox-38.1.1-1.el5_11.i386.rpm
firefox-debuginfo-38.1.1-1.el5_11.i386.rpm

x86_64:
firefox-38.1.1-1.el5_11.i386.rpm
firefox-38.1.1-1.el5_11.x86_64.rpm
firefox-debuginfo-38.1.1-1.el5_11.i386.rpm
firefox-debuginfo-38.1.1-1.el5_11.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
firefox-38.1.1-1.el5_11.src.rpm

i386:
firefox-38.1.1-1.el5_11.i386.rpm
firefox-debuginfo-38.1.1-1.el5_11.i386.rpm

ppc:
firefox-38.1.1-1.el5_11.ppc64.rpm
firefox-debuginfo-38.1.1-1.el5_11.ppc64.rpm

s390x:
firefox-38.1.1-1.el5_11.s390.rpm
firefox-38.1.1-1.el5_11.s390x.rpm
firefox-debuginfo-38.1.1-1.el5_11.s390.rpm
firefox-debuginfo-38.1.1-1.el5_11.s390x.rpm

x86_64:
firefox-38.1.1-1.el5_11.i386.rpm
firefox-38.1.1-1.el5_11.x86_64.rpm
firefox-debuginfo-38.1.1-1.el5_11.i386.rpm
firefox-debuginfo-38.1.1-1.el5_11.x86_64.rpm

Red Hat Enterprise Linux Desktop (v. 6):

Source:
firefox-38.1.1-1.el6_7.src.rpm

i386:
firefox-38.1.1-1.el6_7.i686.rpm
firefox-debuginfo-38.1.1-1.el6_7.i686.rpm

x86_64:
firefox-38.1.1-1.el6_7.x86_64.rpm
firefox-debuginfo-38.1.1-1.el6_7.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

x86_64:
firefox-38.1.1-1.el6_7.i686.rpm
firefox-debuginfo-38.1.1-1.el6_7.i686.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

Source:
firefox-38.1.1-1.el6_7.src.rpm

x86_64:
firefox-38.1.1-1.el6_7.i686.rpm
firefox-38.1.1-1.el6_7.x86_64.rpm
firefox-debuginfo-38.1.1-1.el6_7.i686.rpm
firefox-debuginfo-38.1.1-1.el6_7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
firefox-38.1.1-1.el6_7.src.rpm

i386:
firefox-38.1.1-1.el6_7.i686.rpm
firefox-debuginfo-38.1.1-1.el6_7.i686.rpm

ppc64:
firefox-38.1.1-1.el6_7.ppc64.rpm
firefox-debuginfo-38.1.1-1.el6_7.ppc64.rpm

s390x:
firefox-38.1.1-1.el6_7.s390x.rpm
firefox-debuginfo-38.1.1-1.el6_7.s390x.rpm

x86_64:
firefox-38.1.1-1.el6_7.x86_64.rpm
firefox-debuginfo-38.1.1-1.el6_7.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

ppc64:
firefox-38.1.1-1.el6_7.ppc.rpm
firefox-debuginfo-38.1.1-1.el6_7.ppc.rpm

s390x:
firefox-38.1.1-1.el6_7.s390.rpm
firefox-debuginfo-38.1.1-1.el6_7.s390.rpm

x86_64:
firefox-38.1.1-1.el6_7.i686.rpm
firefox-debuginfo-38.1.1-1.el6_7.i686.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
firefox-38.1.1-1.el6_7.src.rpm

i386:
firefox-38.1.1-1.el6_7.i686.rpm
firefox-debuginfo-38.1.1-1.el6_7.i686.rpm

x86_64:
firefox-38.1.1-1.el6_7.x86_64.rpm
firefox-debuginfo-38.1.1-1.el6_7.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

x86_64:
firefox-38.1.1-1.el6_7.i686.rpm
firefox-debuginfo-38.1.1-1.el6_7.i686.rpm

Red Hat Enterprise Linux Client (v. 7):

Source:
firefox-38.1.1-1.el7_1.src.rpm

x86_64:
firefox-38.1.1-1.el7_1.x86_64.rpm
firefox-debuginfo-38.1.1-1.el7_1.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
firefox-38.1.1-1.el7_1.i686.rpm
firefox-debuginfo-38.1.1-1.el7_1.i686.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
firefox-38.1.1-1.el7_1.src.rpm

ppc64:
firefox-38.1.1-1.el7_1.ppc64.rpm
firefox-debuginfo-38.1.1-1.el7_1.ppc64.rpm

s390x:
firefox-38.1.1-1.el7_1.s390x.rpm
firefox-debuginfo-38.1.1-1.el7_1.s390x.rpm

x86_64:
firefox-38.1.1-1.el7_1.x86_64.rpm
firefox-debuginfo-38.1.1-1.el7_1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
firefox-38.1.1-1.ael7b_1.src.rpm

ppc64le:
firefox-38.1.1-1.ael7b_1.ppc64le.rpm
firefox-debuginfo-38.1.1-1.ael7b_1.ppc64le.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

ppc64:
firefox-38.1.1-1.el7_1.ppc.rpm
firefox-debuginfo-38.1.1-1.el7_1.ppc.rpm

s390x:
firefox-38.1.1-1.el7_1.s390.rpm
firefox-debuginfo-38.1.1-1.el7_1.s390.rpm

x86_64:
firefox-38.1.1-1.el7_1.i686.rpm
firefox-debuginfo-38.1.1-1.el7_1.i686.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
firefox-38.1.1-1.el7_1.src.rpm

x86_64:
firefox-38.1.1-1.el7_1.x86_64.rpm
firefox-debuginfo-38.1.1-1.el7_1.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
firefox-38.1.1-1.el7_1.i686.rpm
firefox-debuginfo-38.1.1-1.el7_1.i686.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2015-4495
https://access.redhat.com/security/updates/classification/#important
https://www.mozilla.org/en-US/security/known-vulnerabilities/firefox-esr/#firefoxesr38.1.1
https://access.redhat.com/articles/1563163

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2015 Red Hat, Inc.
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