Skip to navigation Skip to main content

Utilities

  • Subscriptions
  • Downloads
  • Red Hat Console
  • Get Support
Red Hat Customer Portal
  • Subscriptions
  • Downloads
  • Red Hat Console
  • Get Support
  • Products

    Top Products

    • Red Hat Enterprise Linux
    • Red Hat OpenShift
    • Red Hat Ansible Automation Platform
    All Products

    Downloads and Containers

    • Downloads
    • Packages
    • Containers

    Top Resources

    • Documentation
    • Product Life Cycles
    • Product Compliance
    • Errata
  • Knowledge

    Red Hat Knowledge Center

    • Knowledgebase Solutions
    • Knowledgebase Articles
    • Customer Portal Labs
    • Errata

    Top Product Docs

    • Red Hat Enterprise Linux
    • Red Hat OpenShift
    • Red Hat Ansible Automation Platform
    All Product Docs

    Training and Certification

    • About
    • Course Index
    • Certification Index
    • Skill Assessment
  • Security

    Red Hat Product Security Center

    • Security Updates
    • Security Advisories
    • Red Hat CVE Database
    • Errata

    References

    • Security Bulletins
    • Severity Ratings
    • Security Data

    Top Resources

    • Security Labs
    • Backporting Policies
    • Security Blog
  • Support

    Red Hat Support

    • Support Cases
    • Troubleshoot
    • Get Support
    • Contact Red Hat Support

    Red Hat Community Support

    • Customer Portal Community
    • Community Discussions
    • Red Hat Accelerator Program

    Top Resources

    • Product Life Cycles
    • Customer Portal Labs
    • Red Hat JBoss Supported Configurations
    • Red Hat Lightspeed
Or troubleshoot an issue.

Select Your Language

  • English
  • Français
  • 한국어
  • 日本語
  • 中文 (中国)

Infrastructure and Management

  • Red Hat Enterprise Linux
  • Red Hat Satellite
  • Red Hat Subscription Management
  • Red Hat Lightspeed
  • Red Hat Ansible Automation Platform

Cloud Computing

  • Red Hat OpenShift
  • Red Hat OpenStack Platform
  • Red Hat OpenShift
  • Red Hat OpenShift AI
  • Red Hat OpenShift Dedicated
  • Red Hat Advanced Cluster Security for Kubernetes
  • Red Hat Advanced Cluster Management for Kubernetes
  • Red Hat Quay
  • Red Hat OpenShift Dev Spaces
  • Red Hat OpenShift Service on AWS

Storage

  • Red Hat Gluster Storage
  • Red Hat Hyperconverged Infrastructure
  • Red Hat Ceph Storage
  • Red Hat OpenShift Data Foundation

Runtimes

  • Red Hat Runtimes
  • Red Hat JBoss Enterprise Application Platform
  • Red Hat Data Grid
  • Red Hat JBoss Web Server
  • Red Hat build of Keycloak
  • Red Hat support for Spring Boot
  • Red Hat build of Node.js
  • Red Hat build of Quarkus

Integration and Automation

  • Red Hat Application Foundations
  • Red Hat Fuse
  • Red Hat AMQ
  • Red Hat 3scale API Management
All Products
Red Hat Product Errata RHSA-2020:5164 - Security Advisory
Issued:
2020-11-23
Updated:
2020-11-23

RHSA-2020:5164 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Important: thunderbird security update

Type/Severity

Security Advisory: Important

Red Hat Lightspeed patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

Topic

An update for thunderbird is now available for Red Hat Enterprise Linux 6.

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.

Description

Mozilla Thunderbird is a standalone mail and newsgroup client.

This update upgrades Thunderbird to version 78.4.3.

Security Fix(es):

  • Mozilla: Write side effects in MCallGetProperty opcode not accounted for (CVE-2020-26950)

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.

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.

Affected Products

  • Red Hat Enterprise Linux Server 6 x86_64
  • Red Hat Enterprise Linux Server 6 i386
  • Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
  • Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
  • Red Hat Enterprise Linux Workstation 6 x86_64
  • Red Hat Enterprise Linux Workstation 6 i386
  • Red Hat Enterprise Linux Desktop 6 x86_64
  • Red Hat Enterprise Linux Desktop 6 i386
  • Red Hat Enterprise Linux for IBM z Systems 6 s390x
  • Red Hat Enterprise Linux for Power, big endian 6 ppc64
  • Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
  • Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
  • Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
  • Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

  • BZ - 1896306 - CVE-2020-26950 Mozilla: Write side effects in MCallGetProperty opcode not accounted for

CVEs

  • CVE-2020-26950

References

  • https://access.redhat.com/security/updates/classification/#important
Note: More recent versions of these packages may be available. Click a package name for more details.

Red Hat Enterprise Linux Server 6

SRPM
thunderbird-78.4.3-1.el6_10.src.rpm SHA-256: 3ce6f184c5e5af5f525f35f0c95dfaf2fbad164789e1212139d094b903d86004
x86_64
thunderbird-78.4.3-1.el6_10.x86_64.rpm SHA-256: 1bc7dbe5ca9f054e0f7503268f13aeca08f09f73214af470326c75474908ed8b
thunderbird-78.4.3-1.el6_10.x86_64.rpm SHA-256: 1bc7dbe5ca9f054e0f7503268f13aeca08f09f73214af470326c75474908ed8b
thunderbird-debuginfo-78.4.3-1.el6_10.x86_64.rpm SHA-256: 1402bb9e435f1549af9069f1c07823c27a45ba7af2fd48f223f586033396e98e
i386
thunderbird-78.4.3-1.el6_10.i686.rpm SHA-256: 902279130cb356f1747f1bf8a269b0933071f1411f839b480b3b0a8953a9e972

Red Hat Enterprise Linux Server - Extended Life Cycle Support 6

SRPM
thunderbird-78.4.3-1.el6_10.src.rpm SHA-256: 3ce6f184c5e5af5f525f35f0c95dfaf2fbad164789e1212139d094b903d86004
x86_64
thunderbird-78.4.3-1.el6_10.x86_64.rpm SHA-256: 1bc7dbe5ca9f054e0f7503268f13aeca08f09f73214af470326c75474908ed8b
thunderbird-debuginfo-78.4.3-1.el6_10.x86_64.rpm SHA-256: 1402bb9e435f1549af9069f1c07823c27a45ba7af2fd48f223f586033396e98e
i386
thunderbird-78.4.3-1.el6_10.i686.rpm SHA-256: 902279130cb356f1747f1bf8a269b0933071f1411f839b480b3b0a8953a9e972

Red Hat Enterprise Linux Workstation 6

SRPM
thunderbird-78.4.3-1.el6_10.src.rpm SHA-256: 3ce6f184c5e5af5f525f35f0c95dfaf2fbad164789e1212139d094b903d86004
x86_64
thunderbird-78.4.3-1.el6_10.x86_64.rpm SHA-256: 1bc7dbe5ca9f054e0f7503268f13aeca08f09f73214af470326c75474908ed8b
thunderbird-debuginfo-78.4.3-1.el6_10.x86_64.rpm SHA-256: 1402bb9e435f1549af9069f1c07823c27a45ba7af2fd48f223f586033396e98e
i386
thunderbird-78.4.3-1.el6_10.i686.rpm SHA-256: 902279130cb356f1747f1bf8a269b0933071f1411f839b480b3b0a8953a9e972

Red Hat Enterprise Linux Desktop 6

SRPM
thunderbird-78.4.3-1.el6_10.src.rpm SHA-256: 3ce6f184c5e5af5f525f35f0c95dfaf2fbad164789e1212139d094b903d86004
x86_64
thunderbird-78.4.3-1.el6_10.x86_64.rpm SHA-256: 1bc7dbe5ca9f054e0f7503268f13aeca08f09f73214af470326c75474908ed8b
thunderbird-debuginfo-78.4.3-1.el6_10.x86_64.rpm SHA-256: 1402bb9e435f1549af9069f1c07823c27a45ba7af2fd48f223f586033396e98e
i386
thunderbird-78.4.3-1.el6_10.i686.rpm SHA-256: 902279130cb356f1747f1bf8a269b0933071f1411f839b480b3b0a8953a9e972

Red Hat Enterprise Linux for IBM z Systems 6

SRPM
thunderbird-78.4.3-1.el6_10.src.rpm SHA-256: 3ce6f184c5e5af5f525f35f0c95dfaf2fbad164789e1212139d094b903d86004
s390x
thunderbird-78.4.3-1.el6_10.s390x.rpm SHA-256: b387a317ae08da23121b21984aed7ea25ee19ed99c495d4ee641df374ef791dd
thunderbird-debuginfo-78.4.3-1.el6_10.s390x.rpm SHA-256: 960579889fe30a1a8e533b596758b401a0d5ebf1b343508050b84316fbb7b271

Red Hat Enterprise Linux for Power, big endian 6

SRPM
thunderbird-78.4.3-1.el6_10.src.rpm SHA-256: 3ce6f184c5e5af5f525f35f0c95dfaf2fbad164789e1212139d094b903d86004
ppc64
thunderbird-78.4.3-1.el6_10.ppc64.rpm SHA-256: 610d5f3b4f9da2518ae188cc0ab8df7a5d5521279a8c772cd0ab574b1739cf8b
thunderbird-debuginfo-78.4.3-1.el6_10.ppc64.rpm SHA-256: b3d95753246fae97b5f1ed533a7aad77e5a26af6c61143c84bf7a832953512a1

Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6

SRPM
thunderbird-78.4.3-1.el6_10.src.rpm SHA-256: 3ce6f184c5e5af5f525f35f0c95dfaf2fbad164789e1212139d094b903d86004
s390x
thunderbird-78.4.3-1.el6_10.s390x.rpm SHA-256: b387a317ae08da23121b21984aed7ea25ee19ed99c495d4ee641df374ef791dd
thunderbird-debuginfo-78.4.3-1.el6_10.s390x.rpm SHA-256: 960579889fe30a1a8e533b596758b401a0d5ebf1b343508050b84316fbb7b271

Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6

SRPM
thunderbird-78.4.3-1.el6_10.src.rpm SHA-256: 3ce6f184c5e5af5f525f35f0c95dfaf2fbad164789e1212139d094b903d86004
x86_64
thunderbird-78.4.3-1.el6_10.x86_64.rpm SHA-256: 1bc7dbe5ca9f054e0f7503268f13aeca08f09f73214af470326c75474908ed8b
thunderbird-debuginfo-78.4.3-1.el6_10.x86_64.rpm SHA-256: 1402bb9e435f1549af9069f1c07823c27a45ba7af2fd48f223f586033396e98e
i386
thunderbird-78.4.3-1.el6_10.i686.rpm SHA-256: 902279130cb356f1747f1bf8a269b0933071f1411f839b480b3b0a8953a9e972

Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6

SRPM
thunderbird-78.4.3-1.el6_10.src.rpm SHA-256: 3ce6f184c5e5af5f525f35f0c95dfaf2fbad164789e1212139d094b903d86004
s390x
thunderbird-78.4.3-1.el6_10.s390x.rpm SHA-256: b387a317ae08da23121b21984aed7ea25ee19ed99c495d4ee641df374ef791dd
thunderbird-debuginfo-78.4.3-1.el6_10.s390x.rpm SHA-256: 960579889fe30a1a8e533b596758b401a0d5ebf1b343508050b84316fbb7b271

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

Red Hat LinkedIn YouTube Facebook X, formerly Twitter

Quick Links

  • Downloads
  • Subscriptions
  • Support Cases
  • Customer Service
  • Product Documentation

Help

  • Contact Us
  • Customer Portal FAQ
  • Log-in Assistance

Site Info

  • Trust Red Hat
  • Browser Support Policy
  • Accessibility
  • Awards and Recognition
  • Colophon

Related Sites

  • redhat.com
  • developers.redhat.com
  • connect.redhat.com
  • cloud.redhat.com

Red Hat legal and privacy links

  • About Red Hat
  • Jobs
  • Events
  • Locations
  • Contact Red Hat
  • Red Hat Blog
  • Inclusion at Red Hat
  • Cool Stuff Store
  • Red Hat Summit
© 2025 Red Hat

Red Hat legal and privacy links

  • Privacy statement
  • Terms of use
  • All policies and guidelines
  • Digital accessibility