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Red Hat RHSA-2017:3382 Important Firefox Privacy Flaw Exploit

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Calendar Grey December 5, 2017
Scroller Redhat
Update your Mozilla Firefox 52.5.1 ESR to enhance security measures in Red Hat Enterprise Linux. Tackle privacy issues effectively.
An update for firefox is now available for Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7

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.

Summary

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.

Topics%20covered

Topics Covered

security advisory Red Hat software update exploit web browser Firefox privacy flaw

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

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

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

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

Topic

An update for firefox is now available for Red Hat Enterprise Linux 6 andRed Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat software update exploit web browser Firefox privacy flaw

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

Bugs Fixed

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

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