RHEL 5 / 6 / 7 : firefox (RHSA-2015:1207)

This script is Copyright (C) 2015-2017 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

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

Red Hat Product Security has rated this update as having Critical
security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

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

Several flaws were found in the processing of malformed web content. A
web page containing malicious content could cause Firefox to crash or,
potentially, execute arbitrary code with the privileges of the user
running Firefox. (CVE-2015-2724, CVE-2015-2725, CVE-2015-2722,
CVE-2015-2727, CVE-2015-2728, CVE-2015-2729, CVE-2015-2731,
CVE-2015-2733, CVE-2015-2734, CVE-2015-2735, CVE-2015-2736,
CVE-2015-2737, CVE-2015-2738, CVE-2015-2739, CVE-2015-2740)

It was found that Firefox skipped key-pinning checks when handling an
error that could be overridden by the user (for example an expired
certificate error). This flaw allowed a user to override a pinned
certificate, which is an action the user should not be able to
perform. (CVE-2015-2741)

A flaw was discovered in Mozilla's PDF.js PDF file viewer. When
combined with another vulnerability, it could allow execution of
arbitrary code with the privileges of the user running Firefox.
(CVE-2015-2743)

Red Hat would like to thank the Mozilla project for reporting these
issues. Upstream acknowledges Bob Clary, Christian Holler, Bobby
Holley, Andrew McCreight, Terrence Cole, Steve Fink, Mats Palmgren,
Wes Kocher, Andreas Pehrson, Jann Horn, Paul Bandha, Holger
Fuhrmannek, Herre, Looben Yan, Ronald Crane, and Jonas Jenwald as the
original reporters of these issues.

All Firefox users should upgrade to these updated packages, which
contain Firefox version 38.1 ESR, which corrects these issues. After
installing the update, Firefox must be restarted for the changes to
take effect.

See also :

https://www.redhat.com/security/data/cve/CVE-2015-2722.html
https://www.redhat.com/security/data/cve/CVE-2015-2724.html
https://www.redhat.com/security/data/cve/CVE-2015-2725.html
https://www.redhat.com/security/data/cve/CVE-2015-2727.html
https://www.redhat.com/security/data/cve/CVE-2015-2728.html
https://www.redhat.com/security/data/cve/CVE-2015-2729.html
https://www.redhat.com/security/data/cve/CVE-2015-2731.html
https://www.redhat.com/security/data/cve/CVE-2015-2733.html
https://www.redhat.com/security/data/cve/CVE-2015-2734.html
https://www.redhat.com/security/data/cve/CVE-2015-2735.html
https://www.redhat.com/security/data/cve/CVE-2015-2736.html
https://www.redhat.com/security/data/cve/CVE-2015-2737.html
https://www.redhat.com/security/data/cve/CVE-2015-2738.html
https://www.redhat.com/security/data/cve/CVE-2015-2739.html
https://www.redhat.com/security/data/cve/CVE-2015-2740.html
https://www.redhat.com/security/data/cve/CVE-2015-2741.html
https://www.redhat.com/security/data/cve/CVE-2015-2743.html
http://www.nessus.org/u?8b5eaff4
http://rhn.redhat.com/errata/RHSA-2015-1207.html

Solution :

Update the affected firefox and / or firefox-debuginfo packages.

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 7.4
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

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