A thunderbird security update has been released for Red Hat Enterprise Linux 8.

RHSA-2020:1495-01: Important: thunderbird security update

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Red Hat Security Advisory

Synopsis: Important: thunderbird security update
Advisory ID: RHSA-2020:1495-01
Product: Red Hat Enterprise Linux
Advisory URL:   https://access.redhat.com/errata/RHSA-2020:1495
Issue date: 2020-04-16
CVE Names: CVE-2020-6819 CVE-2020-6820 CVE-2020-6821
CVE-2020-6822 CVE-2020-6825
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1. Summary:

An update for thunderbird is now available for Red Hat Enterprise Linux 8.

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 AppStream (v. 8) - ppc64le, 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 AppStream (v. 8):

Source:
thunderbird-68.7.0-1.el8_1.src.rpm

ppc64le:
thunderbird-68.7.0-1.el8_1.ppc64le.rpm
thunderbird-debuginfo-68.7.0-1.el8_1.ppc64le.rpm
thunderbird-debugsource-68.7.0-1.el8_1.ppc64le.rpm

x86_64:
thunderbird-68.7.0-1.el8_1.x86_64.rpm
thunderbird-debuginfo-68.7.0-1.el8_1.x86_64.rpm
thunderbird-debugsource-68.7.0-1.el8_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-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 . More contact
details at   https://access.redhat.com/security/team/contact/

Copyright 2020 Red Hat, Inc.