RedHat: RHSA-2021-0993:01 Important: thunderbird security update
Summary
Mozilla Thunderbird is a standalone mail and newsgroup client.
This update upgrades Thunderbird to version 78.9.0.
Security Fix(es):
* Mozilla: Texture upload into an unbound backing buffer resulted in an
out-of-bound read (CVE-2021-23981)
* Mozilla: Memory safety bugs fixed in Firefox 87 and Firefox ESR 78.9
(CVE-2021-23987)
* Mozilla: Internal network hosts could have been probed by a malicious
webpage (CVE-2021-23982)
* Mozilla: Malicious extensions could have spoofed popup information
(CVE-2021-23984)
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.
Summary
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.
References
https://access.redhat.com/security/cve/CVE-2021-23981 https://access.redhat.com/security/cve/CVE-2021-23982 https://access.redhat.com/security/cve/CVE-2021-23984 https://access.redhat.com/security/cve/CVE-2021-23987 https://access.redhat.com/security/updates/classification/#important
Package List
Red Hat Enterprise Linux AppStream (v. 8):
Source:
thunderbird-78.9.0-3.el8_3.src.rpm
aarch64:
thunderbird-78.9.0-3.el8_3.aarch64.rpm
thunderbird-debuginfo-78.9.0-3.el8_3.aarch64.rpm
thunderbird-debugsource-78.9.0-3.el8_3.aarch64.rpm
ppc64le:
thunderbird-78.9.0-3.el8_3.ppc64le.rpm
thunderbird-debuginfo-78.9.0-3.el8_3.ppc64le.rpm
thunderbird-debugsource-78.9.0-3.el8_3.ppc64le.rpm
x86_64:
thunderbird-78.9.0-3.el8_3.x86_64.rpm
thunderbird-debuginfo-78.9.0-3.el8_3.x86_64.rpm
thunderbird-debugsource-78.9.0-3.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/
Topic
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 impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, x86_64
Bugs Fixed
1942783 - CVE-2021-23981 Mozilla: Texture upload into an unbound backing buffer resulted in an out-of-bound read
1942785 - CVE-2021-23982 Mozilla: Internal network hosts could have been probed by a malicious webpage
1942786 - CVE-2021-23984 Mozilla: Malicious extensions could have spoofed popup information
1942787 - CVE-2021-23987 Mozilla: Memory safety bugs fixed in Firefox 87 and Firefox ESR 78.9
