RHSA-2020:2906 - Security Advisory

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 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 68.10.0.

Security Fix(es):

• Mozilla: Memory corruption due to missing sign-extension for ValueTags on ARM64 (CVE-2020-12417)
• Mozilla: Information disclosure due to manipulated URL object (CVE-2020-12418)
• Mozilla: Use-after-free in nsGlobalWindowInner (CVE-2020-12419)
• Mozilla: Use-After-Free when trying to connect to a STUN server (CVE-2020-12420)
• Mozilla: Add-On updates did not respect the same certificate trust rules as software updates (CVE-2020-12421)

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 7 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le

Fixes

• BZ - 1853014 - CVE-2020-12417 Mozilla: Memory corruption due to missing sign-extension for ValueTags on ARM64
• BZ - 1853015 - CVE-2020-12418 Mozilla: Information disclosure due to manipulated URL object
• BZ - 1853016 - CVE-2020-12419 Mozilla: Use-after-free in nsGlobalWindowInner
• BZ - 1853017 - CVE-2020-12420 Mozilla: Use-After-Free when trying to connect to a STUN server
• BZ - 1853018 - CVE-2020-12421 Mozilla: Add-On updates did not respect the same certificate trust rules as software updates

CVEs

• CVE-2020-12417
• CVE-2020-12418
• CVE-2020-12419
• CVE-2020-12420
• CVE-2020-12421
• CVE-2020-15646

References

• https://access.redhat.com/security/updates/classification/#important
• https://www.mozilla.org/en-US/security/advisories/mfsa2020-26/