RHSA-2020:2049 - Security Advisory

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 Critical. 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 68.8.0.

Security Fix(es):

• Mozilla: Use-after-free during worker shutdown (CVE-2020-12387)
• Mozilla: Memory safety bugs fixed in Firefox 76 and Firefox ESR 68.8 (CVE-2020-12395)
• usrsctp: Buffer overflow in AUTH chunk input validation (CVE-2020-6831)
• Mozilla: Arbitrary local file access with 'Copy as cURL' (CVE-2020-12392)
• Mozilla: Sender Email Address Spoofing using encoded Unicode characters (CVE-2020-12397)

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

Fixes

• BZ - 1831761 - CVE-2020-12387 Mozilla: Use-after-free during worker shutdown
• BZ - 1831763 - CVE-2020-6831 usrsctp: Buffer overflow in AUTH chunk input validation
• BZ - 1831764 - CVE-2020-12392 Mozilla: Arbitrary local file access with 'Copy as cURL'
• BZ - 1831765 - CVE-2020-12395 Mozilla: Memory safety bugs fixed in Firefox 76 and Firefox ESR 68.8
• BZ - 1832565 - CVE-2020-12397 Mozilla: Sender Email Address Spoofing using encoded Unicode characters

CVEs

• CVE-2020-6831
• CVE-2020-12387
• CVE-2020-12392
• CVE-2020-12395
• CVE-2020-12397

References

• https://access.redhat.com/security/updates/classification/#critical