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Red Hat Security Advisory 2020-5146-01

Red Hat Security Advisory 2020-5146-01
Posted Nov 18, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5146-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.4.3.

tags | advisory
systems | linux, redhat
advisories | CVE-2020-26950
MD5 | 096263bf626bcf164c811ed6de976b9a

Red Hat Security Advisory 2020-5146-01

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

Synopsis: Important: thunderbird security update
Advisory ID: RHSA-2020:5146-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:5146
Issue date: 2020-11-18
CVE Names: CVE-2020-26950
====================================================================
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) - aarch64, ppc64le, x86_64

3. Description:

Mozilla Thunderbird is a standalone mail and newsgroup client.

This update upgrades Thunderbird to version 78.4.3.

Security Fix(es):

* Mozilla: Write side effects in MCallGetProperty opcode not accounted for
(CVE-2020-26950)

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/):

1896306 - CVE-2020-26950 Mozilla: Write side effects in MCallGetProperty opcode not accounted for

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

Source:
thunderbird-78.4.3-1.el8_3.src.rpm

aarch64:
thunderbird-78.4.3-1.el8_3.aarch64.rpm
thunderbird-debuginfo-78.4.3-1.el8_3.aarch64.rpm
thunderbird-debugsource-78.4.3-1.el8_3.aarch64.rpm

ppc64le:
thunderbird-78.4.3-1.el8_3.ppc64le.rpm
thunderbird-debuginfo-78.4.3-1.el8_3.ppc64le.rpm
thunderbird-debugsource-78.4.3-1.el8_3.ppc64le.rpm

x86_64:
thunderbird-78.4.3-1.el8_3.x86_64.rpm
thunderbird-debuginfo-78.4.3-1.el8_3.x86_64.rpm
thunderbird-debugsource-78.4.3-1.el8_3.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-2020-26950
https://access.redhat.com/security/updates/classification/#important

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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