Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 591
Alerts This Week
Warning Icon 1 591

Red Hat 7: RHSA-2021:4134-01 Critical: Thunderbird Security Fix

red hat
Calendar Grey November 4, 2021
Dist Redhat Esm H88
Red Hat Enterprise Linux 7 has released an important update for Thunderbird addressing multiple security issues. Prompt attention is advised.
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 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.

Topics%20covered

Topics Covered

security advisory update Red Hat Enterprise Linux important Mozilla security impact thunderbird

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

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: thunderbird-91.3.0-2.el7_9.src.rpm
x86_64: thunderbird-91.3.0-2.el7_9.x86_64.rpm thunderbird-debuginfo-91.3.0-2.el7_9.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
Source: thunderbird-91.3.0-2.el7_9.src.rpm
ppc64le: thunderbird-91.3.0-2.el7_9.ppc64le.rpm thunderbird-debuginfo-91.3.0-2.el7_9.ppc64le.rpm
x86_64: thunderbird-91.3.0-2.el7_9.x86_64.rpm thunderbird-debuginfo-91.3.0-2.el7_9.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source: thunderbird-91.3.0-2.el7_9.src.rpm
x86_64: thunderbird-91.3.0-2.el7_9.x86_64.rpm thunderbird-debuginfo-91.3.0-2.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-2021:4134-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4134
Issue date: 2021-11-04

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 update Red Hat Enterprise Linux important Mozilla security impact thunderbird

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

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

Get the latest News and Insights

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