Home / mailings [RHSA-2020:5164-01] Important: thunderbird security update
Posted on 23 November 2020
RedHat===================================================================== Red Hat Security Advisory
Synopsis: Important: thunderbird security update
Advisory ID: RHSA-2020:5164-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:5164
Issue date: 2020-11-23
CVE Names: CVE-2020-26950
=====================================================================
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 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 Desktop (v. 6):
Source:
thunderbird-78.4.3-1.el6_10.src.rpm
i386:
thunderbird-78.4.3-1.el6_10.i686.rpm
x86_64:
thunderbird-78.4.3-1.el6_10.x86_64.rpm
thunderbird-debuginfo-78.4.3-1.el6_10.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
Source:
thunderbird-78.4.3-1.el6_10.src.rpm
i386:
thunderbird-78.4.3-1.el6_10.i686.rpm
ppc64:
thunderbird-78.4.3-1.el6_10.ppc64.rpm
thunderbird-debuginfo-78.4.3-1.el6_10.ppc64.rpm
s390x:
thunderbird-78.4.3-1.el6_10.s390x.rpm
thunderbird-debuginfo-78.4.3-1.el6_10.s390x.rpm
x86_64:
thunderbird-78.4.3-1.el6_10.x86_64.rpm
thunderbird-debuginfo-78.4.3-1.el6_10.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
thunderbird-78.4.3-1.el6_10.src.rpm
i386:
thunderbird-78.4.3-1.el6_10.i686.rpm
x86_64:
thunderbird-78.4.3-1.el6_10.x86_64.rpm
thunderbird-debuginfo-78.4.3-1.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-2020-26950
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.
