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Red Hat Product Errata RHSA-2021:3791 - Security Advisory
Issued:
2021-10-12
Updated:
2021-10-12

RHSA-2021:3791 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Important: firefox security update

Type/Severity

Security Advisory: Important

Red Hat Insights patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

Topic

An update for firefox 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 Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

This update upgrades Firefox to version 91.2.0 ESR.

Security Fix(es):

  • Mozilla: Use-after-free in MessageTask (CVE-2021-38496)
  • Mozilla: Memory safety bugs fixed in Firefox 93, Firefox ESR 78.15, and Firefox ESR 91.2 (CVE-2021-38500)
  • Mozilla: Memory safety bugs fixed in Firefox 93 and Firefox ESR 91.2 (CVE-2021-38501)
  • rust-crossbeam-deque: race condition may lead to double free (CVE-2021-32810)
  • Mozilla: Validation message could have been overlaid on another origin (CVE-2021-38497)
  • Mozilla: Use-after-free of nsLanguageAtomService object (CVE-2021-38498)

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

After installing the update, Firefox must be restarted for the changes to take effect.

Affected Products

  • Red Hat Enterprise Linux Server 7 x86_64
  • Red Hat Enterprise Linux Workstation 7 x86_64
  • Red Hat Enterprise Linux Desktop 7 x86_64
  • Red Hat Enterprise Linux for IBM z Systems 7 s390x
  • Red Hat Enterprise Linux for Power, big endian 7 ppc64
  • Red Hat Enterprise Linux for Power, little endian 7 ppc64le

Fixes

  • BZ - 1990342 - CVE-2021-32810 rust-crossbeam-deque: race condition may lead to double free
  • BZ - 2011097 - CVE-2021-38496 Mozilla: Use-after-free in MessageTask
  • BZ - 2011098 - CVE-2021-38497 Mozilla: Validation message could have been overlaid on another origin
  • BZ - 2011099 - CVE-2021-38498 Mozilla: Use-after-free of nsLanguageAtomService object
  • BZ - 2011100 - CVE-2021-38500 Mozilla: Memory safety bugs fixed in Firefox 93, Firefox ESR 78.15, and Firefox ESR 91.2
  • BZ - 2011101 - CVE-2021-38501 Mozilla: Memory safety bugs fixed in Firefox 93 and Firefox ESR 91.2

CVEs

  • CVE-2021-32810
  • CVE-2021-38496
  • CVE-2021-38497
  • CVE-2021-38498
  • CVE-2021-38500
  • CVE-2021-38501

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 7

SRPM
firefox-91.2.0-4.el7_9.src.rpm SHA-256: bd92c4608df1130894ffe59084b4aefa112a3b6a257932730e239a0118b752ac
x86_64
firefox-91.2.0-4.el7_9.i686.rpm SHA-256: c09e08506cd0d28b5b0f5a1ec548cc74784b3add93a7373f32fdb6b11cb75c36
firefox-91.2.0-4.el7_9.x86_64.rpm SHA-256: c6f11da612cf12468cd56084287c4080c23b519da4a5d03bb77707389a591892
firefox-debuginfo-91.2.0-4.el7_9.x86_64.rpm SHA-256: a138b06d30080bd22c45a5a8a63549c172fe527c50b4435d6dbce93f77391d82

Red Hat Enterprise Linux Workstation 7

SRPM
firefox-91.2.0-4.el7_9.src.rpm SHA-256: bd92c4608df1130894ffe59084b4aefa112a3b6a257932730e239a0118b752ac
x86_64
firefox-91.2.0-4.el7_9.i686.rpm SHA-256: c09e08506cd0d28b5b0f5a1ec548cc74784b3add93a7373f32fdb6b11cb75c36
firefox-91.2.0-4.el7_9.x86_64.rpm SHA-256: c6f11da612cf12468cd56084287c4080c23b519da4a5d03bb77707389a591892
firefox-debuginfo-91.2.0-4.el7_9.x86_64.rpm SHA-256: a138b06d30080bd22c45a5a8a63549c172fe527c50b4435d6dbce93f77391d82

Red Hat Enterprise Linux Desktop 7

SRPM
firefox-91.2.0-4.el7_9.src.rpm SHA-256: bd92c4608df1130894ffe59084b4aefa112a3b6a257932730e239a0118b752ac
x86_64
firefox-91.2.0-4.el7_9.i686.rpm SHA-256: c09e08506cd0d28b5b0f5a1ec548cc74784b3add93a7373f32fdb6b11cb75c36
firefox-91.2.0-4.el7_9.x86_64.rpm SHA-256: c6f11da612cf12468cd56084287c4080c23b519da4a5d03bb77707389a591892
firefox-debuginfo-91.2.0-4.el7_9.x86_64.rpm SHA-256: a138b06d30080bd22c45a5a8a63549c172fe527c50b4435d6dbce93f77391d82

Red Hat Enterprise Linux for IBM z Systems 7

SRPM
firefox-91.2.0-4.el7_9.src.rpm SHA-256: bd92c4608df1130894ffe59084b4aefa112a3b6a257932730e239a0118b752ac
s390x
firefox-91.2.0-4.el7_9.s390x.rpm SHA-256: 7b1f63dbf2f50459dc9b9efff12742b700785109e5af0f63afef892c8e077f12
firefox-debuginfo-91.2.0-4.el7_9.s390x.rpm SHA-256: 7e530e0573c0f533d44a533ef841ea393611829c4f0157b25947a56c187bffa3

Red Hat Enterprise Linux for Power, big endian 7

SRPM
firefox-91.2.0-4.el7_9.src.rpm SHA-256: bd92c4608df1130894ffe59084b4aefa112a3b6a257932730e239a0118b752ac
ppc64
firefox-91.2.0-4.el7_9.ppc64.rpm SHA-256: 368656169a0559690025d5a14cf1defc5b3b878d169f985bfab07e692819ffb1
firefox-debuginfo-91.2.0-4.el7_9.ppc64.rpm SHA-256: 3a8c460733e706a1d153622a3ca415cde24f952331bd61cb0e864d63ec93f0b2

Red Hat Enterprise Linux for Power, little endian 7

SRPM
firefox-91.2.0-4.el7_9.src.rpm SHA-256: bd92c4608df1130894ffe59084b4aefa112a3b6a257932730e239a0118b752ac
ppc64le
firefox-91.2.0-4.el7_9.ppc64le.rpm SHA-256: 8f95ec13b2e0e83cb7e7f3c1b973c7a3227859bab0841ea80a9544582fb445e4
firefox-debuginfo-91.2.0-4.el7_9.ppc64le.rpm SHA-256: 8f4fb6e9246b697054a2bca8f9fe8ae81585a543d4f9ea710c62b6f851052f54

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

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