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Red Hat: RHSA-2021-0288-01 Critical: Firefox Cross-Origin Issue

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. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: firefox security update Advisory ID: RHSA-2021:0288-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:0288 Issue date: 2021-01-27 CVE Names: CVE-2020-26976 CVE-2021-23953 CVE-2021-23954 CVE-2021-23960 CVE-2021-23964 ==================================================================== 1. Summary: 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. 2. Relevant releases/architectures: Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64 3. 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 JavaScriptvariables 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. 4. 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. 5. Bugs fixed (https://bugzilla.redhat.com/): 1920646 - CVE-2021-23953 Mozilla: Cross-origin information leakage via redirected PDF requests 1920648 - CVE-2021-23954 Mozilla: Type confusion when using logical assignment operators in JavaScript switch statements 1920649 - CVE-2020-26976 Mozilla: HTTPS pages could have been intercepted by a registered service worker when they should not have been 1920650 - CVE-2021-23960 Mozilla: Use-after-poison for incorrectly redeclared JavaScript variables during GC 1920651 - CVE-2021-23964 Mozilla: Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 6. Package List: Red Hat Enterprise Linux AppStream (v. 8): Source: firefox-78.7.0-2.el8_3.src.rpm aarch64: firefox-78.7.0-2.el8_3.aarch64.rpm firefox-debuginfo-78.7.0-2.el8_3.aarch64.rpm firefox-debugsource-78.7.0-2.el8_3.aarch64.rpm ppc64le: firefox-78.7.0-2.el8_3.ppc64le.rpm firefox-debuginfo-78.7.0-2.el8_3.ppc64le.rpm firefox-debugsource-78.7.0-2.el8_3.ppc64le.rpm s390x: firefox-78.7.0-2.el8_3.s390x.rpm firefox-debuginfo-78.7.0-2.el8_3.s390x.rpm firefox-debugsource-78.7.0-2.el8_3.s390x.rpm x86_64: firefox-78.7.0-2.el8_3.x86_64.rpm firefox-debuginfo-78.7.0-2.el8_3.x86_64.rpm firefox-debugsource-78.7.0-2.el8_3.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key 7.References: https://access.redhat.com/security/cve/CVE-2020-26976 https://access.redhat.com/security/cve/CVE-2021-23953 https://access.redhat.com/security/cve/CVE-2021-23954 https://access.redhat.com/security/cve/CVE-2021-23960 https://access.redhat.com/security/cve/CVE-2021-23964 https://access.redhat.com/security/updates/classification#important 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYBGpQtzjgjWX9erEAQgrmBAAjapKLqRXTN59bEkgwM4+BXs1q22w23gk xFwuSqLIM8613OtBKGCKpr+c6AJ9I/VeDaQC7ksgIdz6mruGG83ZKrEwv1cgzHws pe94UvSnUiTlhubTLvF/oFw1mFM8L+651d+GH/T2Mgdhx2yKVn/tNjpL/LV4YW0T hk66oz3vrWlCSUBzsiGin3vFv4XwHlzVcSLOzAuQ1Lch2EC/FGKBiDNR4EWdSb1r XvRj/Y/SrRSnAkwVQJpBfUpaLyUE+TLJ9h1L2KXCRsOuaHx11Q+Ef9t9LRUT0TDr MjNy3fFesMYPoRACmzBV6A5NhSnYH7T+83mMh6XoqoT0frIBBAj2J08uhCRS5sCa leVlH/ftbvR3dLS94y5DC6bsp5ZA9KFQ5gMMXQ6mibc/nAbtd6mC4lQlY8xziUj0 KuJAfEWdq1eFLtjpqo+Fm47Zk9/Xz5QRLr2KY+eNFmXoBEG4W4x511PmP3sDsgd2 n1YjFHLZvQTQIbJks0CtVBqQ4PxjVUUG1xsM7LWceI8OWiAyRSxnwCX9U0fuzzRT WWVEIXkWSzbj/zfYtAGcPfSSUWNhETM6z7y8nAq+3zUyMPgWx8zEy9bpq813WT+2 Pxv8sDx8BPp0fdU/DfGH03qfNi0gb7V6TpOSxGWvLPSVBJnGBQHYO20+zOBl6TZy V7oGb4erhfA=I1Yi -----END PGP SIGNATURE----- -- RHSA-announce mailing list This email address is being protected from spambots. You need JavaScript enabled to view it. . The latest FireFox upgrade for Red Hat Enterprise Linux 8 resolves several security vulnerabilities classified as important. Update it immediately!. Red Hat Firefox Update, Important Security Advisory, Linux AppStream Support. . Severity: Important. LinuxSecurity.com Team

Jan 27, 2021 •Important Red Hat