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

Synopsis:          Important: thunderbird security update
Advisory ID:       RHSA-2015:1455-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2015-1455.html
Issue date:        2015-07-20
CVE Names:         CVE-2015-2724 CVE-2015-2725 CVE-2015-2731 
                   CVE-2015-2734 CVE-2015-2735 CVE-2015-2736 
                   CVE-2015-2737 CVE-2015-2738 CVE-2015-2739 
                   CVE-2015-2740 CVE-2015-2741 
=====================================================================

1. Summary:

An updated thunderbird package that fixes multiple security issues is now
available for Red Hat Enterprise Linux 5, 6, and 7.

Red Hat Product Security has rated this update as having Important 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.

2. Relevant releases/architectures:

RHEL Optional Productivity Applications (v. 5 server) - i386, x86_64
Red Hat Enterprise Linux Client (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 Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64le, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64

3. Description:

Mozilla Thunderbird is a standalone mail and newsgroup client.

Several flaws were found in the processing of malformed web content. A web
page containing malicious content could cause Thunderbird to crash or,
potentially, execute arbitrary code with the privileges of the user running
Thunderbird. (CVE-2015-2724, CVE-2015-2725, CVE-2015-2731, 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 Thunderbird 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)

Note: All of the above issues cannot be exploited by a specially crafted
HTML mail message as JavaScript is disabled by default for mail messages.
They could be exploited another way in Thunderbird, for example, when
viewing the full remote content of an RSS feed.

Red Hat would like to thank the Mozilla project for reporting these issues.
Upstream acknowledges Bob Clary, Christian Holler, Bobby Holley, Andrew
McCreight, Herre, Ronald Crane, and David Keeler as the original reporters
of these issues.

For technical details regarding these flaws, refer to the Mozilla security
advisories for Thunderbird 31.8. You can find a link to the Mozilla
advisories in the References section of this erratum.

All Thunderbird users should upgrade to this updated package, which
contains Thunderbird version 31.8, which corrects these issues.
After installing the update, Thunderbird 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/):

1236947 - CVE-2015-2724 CVE-2015-2725 Mozilla: Miscellaneous memory safety hazards (rv:31.8 / rv:38.1) (MFSA 2015-59)
1236953 - CVE-2015-2731 Mozilla: Use-after-free in Content Policy due to microtask execution error (MFSA 2015-63)
1236956 - CVE-2015-2734 CVE-2015-2735 CVE-2015-2736 CVE-2015-2737 CVE-2015-2738 CVE-2015-2739 CVE-2015-2740 Mozilla: Vulnerabilities found through code inspection (MFSA 2015-66)
1236963 - CVE-2015-2741 Mozilla: Key pinning is ignored when overridable errors are encountered (MFSA 2015-67)

6. Package List:

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

Source:
thunderbird-31.8.0-1.el5_11.src.rpm

i386:
thunderbird-31.8.0-1.el5_11.i386.rpm
thunderbird-debuginfo-31.8.0-1.el5_11.i386.rpm

x86_64:
thunderbird-31.8.0-1.el5_11.x86_64.rpm
thunderbird-debuginfo-31.8.0-1.el5_11.x86_64.rpm

RHEL Optional Productivity Applications (v. 5 server):

Source:
thunderbird-31.8.0-1.el5_11.src.rpm

i386:
thunderbird-31.8.0-1.el5_11.i386.rpm
thunderbird-debuginfo-31.8.0-1.el5_11.i386.rpm

x86_64:
thunderbird-31.8.0-1.el5_11.x86_64.rpm
thunderbird-debuginfo-31.8.0-1.el5_11.x86_64.rpm

Red Hat Enterprise Linux Desktop (v. 6):

Source:
thunderbird-31.8.0-1.el6_6.src.rpm

i386:
thunderbird-31.8.0-1.el6_6.i686.rpm
thunderbird-debuginfo-31.8.0-1.el6_6.i686.rpm

x86_64:
thunderbird-31.8.0-1.el6_6.x86_64.rpm
thunderbird-debuginfo-31.8.0-1.el6_6.x86_64.rpm

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

Source:
thunderbird-31.8.0-1.el6_6.src.rpm

i386:
thunderbird-31.8.0-1.el6_6.i686.rpm
thunderbird-debuginfo-31.8.0-1.el6_6.i686.rpm

ppc64:
thunderbird-31.8.0-1.el6_6.ppc64.rpm
thunderbird-debuginfo-31.8.0-1.el6_6.ppc64.rpm

s390x:
thunderbird-31.8.0-1.el6_6.s390x.rpm
thunderbird-debuginfo-31.8.0-1.el6_6.s390x.rpm

x86_64:
thunderbird-31.8.0-1.el6_6.x86_64.rpm
thunderbird-debuginfo-31.8.0-1.el6_6.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
thunderbird-31.8.0-1.el6_6.src.rpm

i386:
thunderbird-31.8.0-1.el6_6.i686.rpm
thunderbird-debuginfo-31.8.0-1.el6_6.i686.rpm

x86_64:
thunderbird-31.8.0-1.el6_6.x86_64.rpm
thunderbird-debuginfo-31.8.0-1.el6_6.x86_64.rpm

Red Hat Enterprise Linux Client (v. 7):

Source:
thunderbird-31.8.0-1.el7_1.src.rpm

x86_64:
thunderbird-31.8.0-1.el7_1.x86_64.rpm
thunderbird-debuginfo-31.8.0-1.el7_1.x86_64.rpm

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

Source:
thunderbird-31.8.0-1.el7_1.src.rpm

x86_64:
thunderbird-31.8.0-1.el7_1.x86_64.rpm
thunderbird-debuginfo-31.8.0-1.el7_1.x86_64.rpm

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

Source:
thunderbird-31.8.0-1.ael7b_1.src.rpm

ppc64le:
thunderbird-31.8.0-1.ael7b_1.ppc64le.rpm
thunderbird-debuginfo-31.8.0-1.ael7b_1.ppc64le.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
thunderbird-31.8.0-1.el7_1.src.rpm

x86_64:
thunderbird-31.8.0-1.el7_1.x86_64.rpm
thunderbird-debuginfo-31.8.0-1.el7_1.x86_64.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-2015-2724
https://access.redhat.com/security/cve/CVE-2015-2725
https://access.redhat.com/security/cve/CVE-2015-2731
https://access.redhat.com/security/cve/CVE-2015-2734
https://access.redhat.com/security/cve/CVE-2015-2735
https://access.redhat.com/security/cve/CVE-2015-2736
https://access.redhat.com/security/cve/CVE-2015-2737
https://access.redhat.com/security/cve/CVE-2015-2738
https://access.redhat.com/security/cve/CVE-2015-2739
https://access.redhat.com/security/cve/CVE-2015-2740
https://access.redhat.com/security/cve/CVE-2015-2741
https://access.redhat.com/security/updates/classification/#important
https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/#thunderbird31.8

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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