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Red Hat Product Errata RHSA-2021:0995 - Security Advisory
Issued:
2021-03-25
Updated:
2021-03-25

RHSA-2021:0995 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Important: thunderbird security update

Type/Severity

Security Advisory: Important

Topic

An update for thunderbird is now available for Red Hat Enterprise Linux 8.1 Extended Update Support.

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 78.9.0.

Security Fix(es):

  • Mozilla: Texture upload into an unbound backing buffer resulted in an out-of-bound read (CVE-2021-23981)
  • Mozilla: Memory safety bugs fixed in Firefox 87 and Firefox ESR 78.9 (CVE-2021-23987)
  • Mozilla: Internal network hosts could have been probed by a malicious webpage (CVE-2021-23982)
  • Mozilla: Malicious extensions could have spoofed popup information (CVE-2021-23984)

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 for x86_64 - Extended Update Support 8.1 x86_64
  • Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.1 ppc64le
  • Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 8.1 ppc64le
  • Red Hat Enterprise Linux Server - Update Services for SAP Solutions 8.1 x86_64

Fixes

  • BZ - 1942783 - CVE-2021-23981 Mozilla: Texture upload into an unbound backing buffer resulted in an out-of-bound read
  • BZ - 1942785 - CVE-2021-23982 Mozilla: Internal network hosts could have been probed by a malicious webpage
  • BZ - 1942786 - CVE-2021-23984 Mozilla: Malicious extensions could have spoofed popup information
  • BZ - 1942787 - CVE-2021-23987 Mozilla: Memory safety bugs fixed in Firefox 87 and Firefox ESR 78.9

CVEs

  • CVE-2021-23981
  • CVE-2021-23982
  • CVE-2021-23984
  • CVE-2021-23987

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 for x86_64 - Extended Update Support 8.1

    SRPM
    thunderbird-78.9.0-3.el8_1.src.rpm SHA-256: 9e62ff500db9e1da1ea8f3d0070a7feeb4a07588a0674fcf458a9098c7325cc5
    x86_64
    thunderbird-78.9.0-3.el8_1.x86_64.rpm SHA-256: 9c91dfb64add0041211a6cb7b540f90bcaf27d6643e25071b0098216914aeca7
    thunderbird-debuginfo-78.9.0-3.el8_1.x86_64.rpm SHA-256: 6ff34929bf11fede642d30641e7552ab4898f1d75edd034a6f7ce3f219994b27
    thunderbird-debugsource-78.9.0-3.el8_1.x86_64.rpm SHA-256: cb582302c88e1175439d8a3adb32773bff8a93b2d67b80c69ddbbf2db085e5f9

    Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.1

    SRPM
    thunderbird-78.9.0-3.el8_1.src.rpm SHA-256: 9e62ff500db9e1da1ea8f3d0070a7feeb4a07588a0674fcf458a9098c7325cc5
    ppc64le
    thunderbird-78.9.0-3.el8_1.ppc64le.rpm SHA-256: 40c1e7ddb837b21b555e408417aca2535caf1fa12bcb0883fe31613b27a515c1
    thunderbird-debuginfo-78.9.0-3.el8_1.ppc64le.rpm SHA-256: 475d88de5a27e55a12abf264109249e4aa14ea9a7b605f82ff5b026577d87046
    thunderbird-debugsource-78.9.0-3.el8_1.ppc64le.rpm SHA-256: b8551fe6a887bfa2dfe422e498b2aa5c0810ceed8d6d93847158559e2f9cc48f

    Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 8.1

    SRPM
    thunderbird-78.9.0-3.el8_1.src.rpm SHA-256: 9e62ff500db9e1da1ea8f3d0070a7feeb4a07588a0674fcf458a9098c7325cc5
    ppc64le
    thunderbird-78.9.0-3.el8_1.ppc64le.rpm SHA-256: 40c1e7ddb837b21b555e408417aca2535caf1fa12bcb0883fe31613b27a515c1
    thunderbird-debuginfo-78.9.0-3.el8_1.ppc64le.rpm SHA-256: 475d88de5a27e55a12abf264109249e4aa14ea9a7b605f82ff5b026577d87046
    thunderbird-debugsource-78.9.0-3.el8_1.ppc64le.rpm SHA-256: b8551fe6a887bfa2dfe422e498b2aa5c0810ceed8d6d93847158559e2f9cc48f

    Red Hat Enterprise Linux Server - Update Services for SAP Solutions 8.1

    SRPM
    thunderbird-78.9.0-3.el8_1.src.rpm SHA-256: 9e62ff500db9e1da1ea8f3d0070a7feeb4a07588a0674fcf458a9098c7325cc5
    x86_64
    thunderbird-78.9.0-3.el8_1.x86_64.rpm SHA-256: 9c91dfb64add0041211a6cb7b540f90bcaf27d6643e25071b0098216914aeca7
    thunderbird-debuginfo-78.9.0-3.el8_1.x86_64.rpm SHA-256: 6ff34929bf11fede642d30641e7552ab4898f1d75edd034a6f7ce3f219994b27
    thunderbird-debugsource-78.9.0-3.el8_1.x86_64.rpm SHA-256: cb582302c88e1175439d8a3adb32773bff8a93b2d67b80c69ddbbf2db085e5f9

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

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