Issued:
2021-01-27
Updated:
2021-01-27

RHSA-2021:0288 - Security Advisory

Synopsis

Important: firefox security update

Type/Severity

Security Advisory: Important

Red Hat Insights patch analysis

Identify and remediate systems affected by this advisory.

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Topic

An update for firefox is now available for Red Hat Enterprise Linux 8.

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 78.7.0 ESR.

Security Fix(es):

  • Mozilla: Cross-origin information leakage via redirected PDF requests (CVE-2021-23953)
  • Mozilla: Type confusion when using logical assignment operators in JavaScript switch statements (CVE-2021-23954)
  • Mozilla: Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 (CVE-2021-23964)
  • Mozilla: HTTPS pages could have been intercepted by a registered service worker when they should not have been (CVE-2020-26976)
  • Mozilla: Use-after-poison for incorrectly redeclared JavaScript variables during GC (CVE-2021-23960)

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 for x86_64 8 x86_64
  • Red Hat Enterprise Linux for IBM z Systems 8 s390x
  • Red Hat Enterprise Linux for Power, little endian 8 ppc64le
  • Red Hat Enterprise Linux for ARM 64 8 aarch64

Fixes

  • BZ - 1920646 - CVE-2021-23953 Mozilla: Cross-origin information leakage via redirected PDF requests
  • BZ - 1920648 - CVE-2021-23954 Mozilla: Type confusion when using logical assignment operators in JavaScript switch statements
  • BZ - 1920649 - CVE-2020-26976 Mozilla: HTTPS pages could have been intercepted by a registered service worker when they should not have been
  • BZ - 1920650 - CVE-2021-23960 Mozilla: Use-after-poison for incorrectly redeclared JavaScript variables during GC
  • BZ - 1920651 - CVE-2021-23964 Mozilla: Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7

Red Hat Enterprise Linux for x86_64 8

SRPM
firefox-78.7.0-2.el8_3.src.rpm SHA-256: 3b936016c379f433ef4311a417e562e65c27dff81fa4d221e7715c1ddb0d5f7d
x86_64
firefox-78.7.0-2.el8_3.x86_64.rpm SHA-256: b2cb88889200ef76e735d9986023be54548180f0bd8da8eb06440931bdcc1e43
firefox-debuginfo-78.7.0-2.el8_3.x86_64.rpm SHA-256: d5a86785269014e77cdd88b8542674cc42d5e090f1e3d778a76e1a1a66f2f4fb
firefox-debugsource-78.7.0-2.el8_3.x86_64.rpm SHA-256: f747a7b9e542f4f65bcecca10b07f31c1b57d8d1b418140820ba625cd30b195f

Red Hat Enterprise Linux for IBM z Systems 8

SRPM
firefox-78.7.0-2.el8_3.src.rpm SHA-256: 3b936016c379f433ef4311a417e562e65c27dff81fa4d221e7715c1ddb0d5f7d
s390x
firefox-78.7.0-2.el8_3.s390x.rpm SHA-256: 3f4f5f65c3f5645f1f677bad0e0d9a46ba50eeab2ed0de54f89d3baf8230bb6e
firefox-debuginfo-78.7.0-2.el8_3.s390x.rpm SHA-256: 4e374ee9c56112707b277289c0405e4ef8769c8cf0fd3139a211bf26946766cb
firefox-debugsource-78.7.0-2.el8_3.s390x.rpm SHA-256: 990c9347231039a090b3363d0a40ce8666bda07e90c231b0baf2df4093f30c38

Red Hat Enterprise Linux for Power, little endian 8

SRPM
firefox-78.7.0-2.el8_3.src.rpm SHA-256: 3b936016c379f433ef4311a417e562e65c27dff81fa4d221e7715c1ddb0d5f7d
ppc64le
firefox-78.7.0-2.el8_3.ppc64le.rpm SHA-256: 51f3dc659c244c096a30b596a029de9b8b67d766cbaa704024fcb4ca4b807dd2
firefox-debuginfo-78.7.0-2.el8_3.ppc64le.rpm SHA-256: 31b8d2b1f6fc791048afbd10b88cceb15b45aa2501a57559da3ac0b4428c7ff4
firefox-debugsource-78.7.0-2.el8_3.ppc64le.rpm SHA-256: ba46bcfc9c651d3f72b6a7cef0a28b9d482730a34ade17c79d8a6236a3904894

Red Hat Enterprise Linux for ARM 64 8

SRPM
firefox-78.7.0-2.el8_3.src.rpm SHA-256: 3b936016c379f433ef4311a417e562e65c27dff81fa4d221e7715c1ddb0d5f7d
aarch64
firefox-78.7.0-2.el8_3.aarch64.rpm SHA-256: a9af8f9c912d836c9db72324850083f7dbe7df18d9de45c7c3011b5390f38030
firefox-debuginfo-78.7.0-2.el8_3.aarch64.rpm SHA-256: e636386c219f7edf9fa197971089aefce6faa2cab655df862e1adf84a29c6206
firefox-debugsource-78.7.0-2.el8_3.aarch64.rpm SHA-256: e30f794532646a73c693e830c38390e74bdd81435c72c757c21b485f998f1e7f

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