An update for firefox is now available for Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score,

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

Synopsis:          Important: firefox security update
Advisory ID:       RHSA-2017:3382-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2017:3382
Issue date:        2017-12-04
CVE Names:         CVE-2017-7843 
====================================================================
1. Summary:

An update for firefox is now available for Red Hat Enterprise Linux 6 and
Red Hat Enterprise Linux 7.

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

2. Relevant releases/architectures:

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. 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
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le

3. Description:

Mozilla Firefox is an open source web browser.

This update upgrades Firefox to version 52.5.1 ESR.

Security Fix(es):

* A privacy flaw was discovered in Firefox. In Private Browsing mode, a web
worker could write persistent data to IndexedDB, which was not cleared when
exiting and would persist across multiple sessions. A malicious website
could exploit the flaw to bypass private-browsing protections and uniquely
fingerprint visitors. (CVE-2017-7843)

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

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

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

After installing the update, Firefox must be restarted for the changes to
take effect.

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

1518566 - CVE-2017-7843 Mozilla: Web worker in Private Browsing mode can write IndexedDB data

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
firefox-52.5.1-1.el6_9.src.rpm

i386:
firefox-52.5.1-1.el6_9.i686.rpm
firefox-debuginfo-52.5.1-1.el6_9.i686.rpm

x86_64:
firefox-52.5.1-1.el6_9.x86_64.rpm
firefox-debuginfo-52.5.1-1.el6_9.x86_64.rpm

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

x86_64:
firefox-52.5.1-1.el6_9.i686.rpm
firefox-debuginfo-52.5.1-1.el6_9.i686.rpm

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

Source:
firefox-52.5.1-1.el6_9.src.rpm

x86_64:
firefox-52.5.1-1.el6_9.i686.rpm
firefox-52.5.1-1.el6_9.x86_64.rpm
firefox-debuginfo-52.5.1-1.el6_9.i686.rpm
firefox-debuginfo-52.5.1-1.el6_9.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
firefox-52.5.1-1.el6_9.src.rpm

i386:
firefox-52.5.1-1.el6_9.i686.rpm
firefox-debuginfo-52.5.1-1.el6_9.i686.rpm

ppc64:
firefox-52.5.1-1.el6_9.ppc64.rpm
firefox-debuginfo-52.5.1-1.el6_9.ppc64.rpm

s390x:
firefox-52.5.1-1.el6_9.s390x.rpm
firefox-debuginfo-52.5.1-1.el6_9.s390x.rpm

x86_64:
firefox-52.5.1-1.el6_9.x86_64.rpm
firefox-debuginfo-52.5.1-1.el6_9.x86_64.rpm

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

ppc64:
firefox-52.5.1-1.el6_9.ppc.rpm
firefox-debuginfo-52.5.1-1.el6_9.ppc.rpm

s390x:
firefox-52.5.1-1.el6_9.s390.rpm
firefox-debuginfo-52.5.1-1.el6_9.s390.rpm

x86_64:
firefox-52.5.1-1.el6_9.i686.rpm
firefox-debuginfo-52.5.1-1.el6_9.i686.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
firefox-52.5.1-1.el6_9.src.rpm

i386:
firefox-52.5.1-1.el6_9.i686.rpm
firefox-debuginfo-52.5.1-1.el6_9.i686.rpm

x86_64:
firefox-52.5.1-1.el6_9.x86_64.rpm
firefox-debuginfo-52.5.1-1.el6_9.x86_64.rpm

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

x86_64:
firefox-52.5.1-1.el6_9.i686.rpm
firefox-debuginfo-52.5.1-1.el6_9.i686.rpm

Red Hat Enterprise Linux Client (v. 7):

Source:
firefox-52.5.1-1.el7_4.src.rpm

x86_64:
firefox-52.5.1-1.el7_4.x86_64.rpm
firefox-debuginfo-52.5.1-1.el7_4.x86_64.rpm

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

x86_64:
firefox-52.5.1-1.el7_4.i686.rpm
firefox-debuginfo-52.5.1-1.el7_4.i686.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
firefox-52.5.1-1.el7_4.src.rpm

ppc64:
firefox-52.5.1-1.el7_4.ppc64.rpm
firefox-debuginfo-52.5.1-1.el7_4.ppc64.rpm

ppc64le:
firefox-52.5.1-1.el7_4.ppc64le.rpm
firefox-debuginfo-52.5.1-1.el7_4.ppc64le.rpm

s390x:
firefox-52.5.1-1.el7_4.s390x.rpm
firefox-debuginfo-52.5.1-1.el7_4.s390x.rpm

x86_64:
firefox-52.5.1-1.el7_4.x86_64.rpm
firefox-debuginfo-52.5.1-1.el7_4.x86_64.rpm

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):

Source:
firefox-52.5.1-1.el7_4.src.rpm

aarch64:
firefox-52.5.1-1.el7_4.aarch64.rpm
firefox-debuginfo-52.5.1-1.el7_4.aarch64.rpm

ppc64le:
firefox-52.5.1-1.el7_4.ppc64le.rpm
firefox-debuginfo-52.5.1-1.el7_4.ppc64le.rpm

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

ppc64:
firefox-52.5.1-1.el7_4.ppc.rpm
firefox-debuginfo-52.5.1-1.el7_4.ppc.rpm

s390x:
firefox-52.5.1-1.el7_4.s390.rpm
firefox-debuginfo-52.5.1-1.el7_4.s390.rpm

x86_64:
firefox-52.5.1-1.el7_4.i686.rpm
firefox-debuginfo-52.5.1-1.el7_4.i686.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
firefox-52.5.1-1.el7_4.src.rpm

x86_64:
firefox-52.5.1-1.el7_4.x86_64.rpm
firefox-debuginfo-52.5.1-1.el7_4.x86_64.rpm

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

x86_64:
firefox-52.5.1-1.el7_4.i686.rpm
firefox-debuginfo-52.5.1-1.el7_4.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-2017-7843
https://access.redhat.com/security/updates/classification/#important
https://www.mozilla.org/en-US/security/advisories/mfsa2017-27/#CVE-2017-7843

8. Contact:

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

Copyright 2017 Red Hat, Inc.
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