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

Synopsis:          Important: thunderbird security update
Advisory ID:       RHSA-2020:1488-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2020:1488
Issue date:        2020-04-16
CVE Names:         CVE-2020-6819 CVE-2020-6820 CVE-2020-6821 
                   CVE-2020-6822 CVE-2020-6825 
=====================================================================

1. Summary:

An update for thunderbird is now available for Red Hat Enterprise Linux 6.

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 Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

3. Description:

Mozilla Thunderbird is a standalone mail and newsgroup client.

This update upgrades Thunderbird to version 68.7.0.

Security Fix(es):

* Mozilla: Use-after-free while running the nsDocShell destructor
(CVE-2020-6819)

* Mozilla: Use-after-free when handling a ReadableStream (CVE-2020-6820)

* Mozilla: Uninitialized memory could be read when using the WebGL
copyTexSubImage method (CVE-2020-6821)

* Mozilla: Memory safety bugs fixed in Firefox 75 and Firefox ESR 68.7
(CVE-2020-6825)

* Mozilla: Out of bounds write in GMPDecodeData when processing large
images (CVE-2020-6822)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

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

All running instances of Thunderbird must be restarted for the update to
take effect.

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

1820869 - CVE-2020-6819 Mozilla: Use-after-free while running the nsDocShell
 destructor
1820878 - CVE-2020-6820 Mozilla: Use-after-free when handling a ReadableStream
1821674 - CVE-2020-6821 Mozilla: Uninitialized memory could be read when using
 the WebGL copyTexSubImage method
1821676 - CVE-2020-6822 Mozilla: Out of bounds write in GMPDecodeData when
 processing large images
1821682 - CVE-2020-6825 Mozilla: Memory safety bugs fixed in Firefox 75 and
 Firefox ESR 68.7

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
thunderbird-68.7.0-1.el6_10.src.rpm

i386:
thunderbird-68.7.0-1.el6_10.i686.rpm
thunderbird-debuginfo-68.7.0-1.el6_10.i686.rpm

x86_64:
thunderbird-68.7.0-1.el6_10.x86_64.rpm
thunderbird-debuginfo-68.7.0-1.el6_10.x86_64.rpm

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

Source:
thunderbird-68.7.0-1.el6_10.src.rpm

i386:
thunderbird-68.7.0-1.el6_10.i686.rpm
thunderbird-debuginfo-68.7.0-1.el6_10.i686.rpm

ppc64:
thunderbird-68.7.0-1.el6_10.ppc64.rpm
thunderbird-debuginfo-68.7.0-1.el6_10.ppc64.rpm

s390x:
thunderbird-68.7.0-1.el6_10.s390x.rpm
thunderbird-debuginfo-68.7.0-1.el6_10.s390x.rpm

x86_64:
thunderbird-68.7.0-1.el6_10.x86_64.rpm
thunderbird-debuginfo-68.7.0-1.el6_10.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
thunderbird-68.7.0-1.el6_10.src.rpm

i386:
thunderbird-68.7.0-1.el6_10.i686.rpm
thunderbird-debuginfo-68.7.0-1.el6_10.i686.rpm

x86_64:
thunderbird-68.7.0-1.el6_10.x86_64.rpm
thunderbird-debuginfo-68.7.0-1.el6_10.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-2020-6819
https://access.redhat.com/security/cve/CVE-2020-6820
https://access.redhat.com/security/cve/CVE-2020-6821
https://access.redhat.com/security/cve/CVE-2020-6822
https://access.redhat.com/security/cve/CVE-2020-6825
https://access.redhat.com/security/updates/classification/#important
https://www.mozilla.org/en-US/security/advisories/mfsa2020-14/

8. Contact:

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

Copyright 2020 Red Hat, Inc.
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