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Red Hat Security Advisory 2020-5624-01

Red Hat Security Advisory 2020-5624-01
Posted Dec 17, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5624-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.6.0. Issues addressed include buffer overflow and use-after-free vulnerabilities.

tags | advisory, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2020-16042, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113
SHA-256 | d73da8cf8633196724190d037d4a637357e4de5ee22c53686602843ab37dc815

Red Hat Security Advisory 2020-5624-01

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

Synopsis: Important: thunderbird security update
Advisory ID: RHSA-2020:5624-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:5624
Issue date: 2020-12-17
CVE Names: CVE-2020-16042 CVE-2020-26971 CVE-2020-26973
CVE-2020-26974 CVE-2020-26978 CVE-2020-35111
CVE-2020-35113
=====================================================================

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 78.6.0.

Security Fix(es):

* chromium-browser: Uninitialized Use in V8 (CVE-2020-16042)

* Mozilla: Heap buffer overflow in WebGL (CVE-2020-26971)

* Mozilla: CSS Sanitizer performed incorrect sanitization (CVE-2020-26973)

* Mozilla: Incorrect cast of StyleGenericFlexBasis resulted in a heap
use-after-free (CVE-2020-26974)

* Mozilla: Memory safety bugs fixed in Firefox 84 and Firefox ESR 78.6
(CVE-2020-35113)

* Mozilla: Internal network hosts could have been probed by a malicious
webpage (CVE-2020-26978)

* Mozilla: The proxy.onRequest API did not catch view-source URLs
(CVE-2020-35111)

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/):

1904515 - CVE-2020-16042 chromium-browser: Uninitialized Use in V8
1908022 - CVE-2020-26971 Mozilla: Heap buffer overflow in WebGL
1908023 - CVE-2020-26973 Mozilla: CSS Sanitizer performed incorrect sanitization
1908024 - CVE-2020-26974 Mozilla: Incorrect cast of StyleGenericFlexBasis resulted in a heap use-after-free
1908025 - CVE-2020-26978 Mozilla: Internal network hosts could have been probed by a malicious webpage
1908027 - CVE-2020-35111 Mozilla: The proxy.onRequest API did not catch view-source URLs
1908029 - CVE-2020-35113 Mozilla: Memory safety bugs fixed in Firefox 84 and Firefox ESR 78.6

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

Source:
thunderbird-78.6.0-1.el8_3.src.rpm

aarch64:
thunderbird-78.6.0-1.el8_3.aarch64.rpm
thunderbird-debuginfo-78.6.0-1.el8_3.aarch64.rpm
thunderbird-debugsource-78.6.0-1.el8_3.aarch64.rpm

ppc64le:
thunderbird-78.6.0-1.el8_3.ppc64le.rpm
thunderbird-debuginfo-78.6.0-1.el8_3.ppc64le.rpm
thunderbird-debugsource-78.6.0-1.el8_3.ppc64le.rpm

x86_64:
thunderbird-78.6.0-1.el8_3.x86_64.rpm
thunderbird-debuginfo-78.6.0-1.el8_3.x86_64.rpm
thunderbird-debugsource-78.6.0-1.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-2020-16042
https://access.redhat.com/security/cve/CVE-2020-26971
https://access.redhat.com/security/cve/CVE-2020-26973
https://access.redhat.com/security/cve/CVE-2020-26974
https://access.redhat.com/security/cve/CVE-2020-26978
https://access.redhat.com/security/cve/CVE-2020-35111
https://access.redhat.com/security/cve/CVE-2020-35113
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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