Alerts This Week
Warning Icon 1 916
Alerts This Week
Warning Icon 1 916

Red Hat 7 Thunderbird Important Update RHSA-2021:0297-01 CVE-2021-23953

red hat
Calendar Grey January 28, 2021
Dist Redhat Esm H88
Mozilla has launched a major update for Thunderbird on Red Hat Enterprise Linux 7, addressing critical security flaws and improving overall safeguarding measures.
An update for thunderbird is now available for Red Hat Enterprise Linux 7

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.

Summary

Mozilla Thunderbird is a standalone mail and newsgroup client.
This update upgrades Thunderbird to version 78.7.0.
Security Fix(es):
* Mozilla: Cross-origin information leakage via redirected PDF requests (CVE-2021-23953)
* Mozilla: Type confusion when using logical assignment operators in JavaScript switch statements (CVE-2021-23954)
* Mozilla: Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 (CVE-2021-23964)
* Mozilla: IMAP Response Injection when using STARTTLS (CVE-2020-15685)
* Mozilla: HTTPS pages could have been intercepted by a registered service worker when they should not have been (CVE-2020-26976)
* Mozilla: Use-after-poison for incorrectly redeclared JavaScript variables during GC (CVE-2021-23960)
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.

Topics%20covered

Topics Covered

security advisory Red Hat important thunderbird memory safety information leakage

References

https://access.redhat.com/security/cve/CVE-2020-15685 https://access.redhat.com/security/cve/CVE-2020-26976 https://access.redhat.com/security/cve/CVE-2021-23953 https://access.redhat.com/security/cve/CVE-2021-23954 https://access.redhat.com/security/cve/CVE-2021-23960 https://access.redhat.com/security/cve/CVE-2021-23964 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: thunderbird-78.7.0-1.el7_9.src.rpm
x86_64: thunderbird-78.7.0-1.el7_9.x86_64.rpm thunderbird-debuginfo-78.7.0-1.el7_9.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
Source: thunderbird-78.7.0-1.el7_9.src.rpm
ppc64le: thunderbird-78.7.0-1.el7_9.ppc64le.rpm thunderbird-debuginfo-78.7.0-1.el7_9.ppc64le.rpm
x86_64: thunderbird-78.7.0-1.el7_9.x86_64.rpm thunderbird-debuginfo-78.7.0-1.el7_9.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source: thunderbird-78.7.0-1.el7_9.src.rpm
x86_64: thunderbird-78.7.0-1.el7_9.x86_64.rpm thunderbird-debuginfo-78.7.0-1.el7_9.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


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:0297-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0297
Issue date: 2021-01-28

Topic

An update for thunderbird is now available for Red Hat Enterprise Linux 7.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.

Topics%20covered

Topics Covered

security advisory Red Hat important thunderbird memory safety information leakage

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64le, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Bugs Fixed

1920646 - CVE-2021-23953 Mozilla: Cross-origin information leakage via redirected PDF requests

1920648 - CVE-2021-23954 Mozilla: Type confusion when using logical assignment operators in JavaScript switch statements

1920649 - CVE-2020-26976 Mozilla: HTTPS pages could have been intercepted by a registered service worker when they should not have been

1920650 - CVE-2021-23960 Mozilla: Use-after-poison for incorrectly redeclared JavaScript variables during GC

1920651 - CVE-2021-23964 Mozilla: Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7

1921543 - CVE-2020-15685 Mozilla: IMAP Response Injection when using STARTTLS

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here