[RHSA-2021:4130-01] Important: thunderbird security update

Thu Nov 4 16:58:06 UTC 2021

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, s390x, x86_64

3. Description:

Mozilla Thunderbird is a standalone mail and newsgroup client.

This update upgrades Thunderbird to version 91.3.0.

Security Fix(es):

* Mozilla: Use-after-free in HTTP2 Session object

* Mozilla: Memory safety bugs fixed in Firefox 94 and Firefox ESR 91.3

* Mozilla: iframe sandbox rules did not apply to XSLT stylesheets
(CVE-2021-38503)

* Mozilla: Use-after-free in file picker dialog (CVE-2021-38504)

* Mozilla: Firefox could be coaxed into going into fullscreen mode without
notification or warning (CVE-2021-38506)

* Mozilla: Opportunistic Encryption in HTTP2 could be used to bypass the
Same-Origin-Policy on services hosted on other ports (CVE-2021-38507)

* Mozilla: Permission Prompt could be overlaid, resulting in user confusion
and potential spoofing (CVE-2021-38508)

* Mozilla: Javascript alert box could have been spoofed onto an arbitrary
domain (CVE-2021-38509)

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/):

2019621 - CVE-2021-38503 Mozilla: iframe sandbox rules did not apply to XSLT stylesheets
2019622 - CVE-2021-38504 Mozilla: Use-after-free in file picker dialog
2019624 - CVE-2021-38506 Mozilla: Firefox could be coaxed into going into fullscreen mode without notification or warning
2019625 - CVE-2021-38507 Mozilla: Opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports
2019626 - Mozilla: Use-after-free in HTTP2 Session object
2019627 - CVE-2021-38508 Mozilla: Permission Prompt could be overlaid, resulting in user confusion and potential spoofing
2019628 - CVE-2021-38509 Mozilla: Javascript alert box could have been spoofed onto an arbitrary domain
2019630 - Mozilla: Memory safety bugs fixed in Firefox 94 and Firefox ESR 91.3

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

Source:
thunderbird-91.3.0-2.el8_4.src.rpm

aarch64:
thunderbird-91.3.0-2.el8_4.aarch64.rpm
thunderbird-debuginfo-91.3.0-2.el8_4.aarch64.rpm
thunderbird-debugsource-91.3.0-2.el8_4.aarch64.rpm

ppc64le:
thunderbird-91.3.0-2.el8_4.ppc64le.rpm
thunderbird-debuginfo-91.3.0-2.el8_4.ppc64le.rpm
thunderbird-debugsource-91.3.0-2.el8_4.ppc64le.rpm

s390x:
thunderbird-91.3.0-2.el8_4.s390x.rpm
thunderbird-debuginfo-91.3.0-2.el8_4.s390x.rpm
thunderbird-debugsource-91.3.0-2.el8_4.s390x.rpm

x86_64:
thunderbird-91.3.0-2.el8_4.x86_64.rpm
thunderbird-debuginfo-91.3.0-2.el8_4.x86_64.rpm
thunderbird-debugsource-91.3.0-2.el8_4.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-2021-38503
https://access.redhat.com/security/cve/CVE-2021-38504
https://access.redhat.com/security/cve/CVE-2021-38506
https://access.redhat.com/security/cve/CVE-2021-38507
https://access.redhat.com/security/cve/CVE-2021-38508
https://access.redhat.com/security/cve/CVE-2021-38509
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2021 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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=YJjf
-----END PGP SIGNATURE-----