-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: firefox security update Advisory ID: RHSA-2021:4116-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:4116 Issue date: 2021-11-03 CVE Names: CVE-2021-38503 CVE-2021-38504 CVE-2021-38506 CVE-2021-38507 CVE-2021-38508 CVE-2021-38509 ==================================================================== 1. Summary: 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. 2. Relevant releases/architectures: Red Hat Enterprise Linux Client (v. 7) - x86_64 Red Hat Enterprise Linux Client Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - 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 91.3.0 ESR. Security Fix(es): * Mozilla: Use-after-free in HTTP2 Session object * Mozilla: Memory safety bugs fixed in Firefox 94 and Firefox ESR 91.3 * Mozilla: iframe sandbox rules did not apply to XSLT stylesheets (CVE-2021-38503) * Mozilla: Use-after-free in file picker dialog (CVE-2021-38504) * Mozilla: Firefox could be coaxed into going into fullscreen mode without notification or warning (CVE-2021-38506) * Mozilla: Opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports (CVE-2021-38507) * Mozilla: Permission Prompt could be overlaid, resulting in user confusion and potential spoofing (CVE-2021-38508) * Mozilla: Javascript alert box could have been spoofed onto an arbitrary domain (CVE-2021-38509) 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/): 2019621 - CVE-2021-38503 Mozilla: iframe sandbox rules did not apply to XSLT stylesheets 2019622 - CVE-2021-38504 Mozilla: Use-after-free in file picker dialog 2019624 - CVE-2021-38506 Mozilla: Firefox could be coaxed into going into fullscreen mode without notification or warning 2019625 - CVE-2021-38507 Mozilla: Opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports 2019626 - Mozilla: Use-after-free in HTTP2 Session object 2019627 - CVE-2021-38508 Mozilla: Permission Prompt could be overlaid, resulting in user confusion and potential spoofing 2019628 - CVE-2021-38509 Mozilla: Javascript alert box could have been spoofed onto an arbitrary domain 2019630 - Mozilla: Memory safety bugs fixed in Firefox 94 and Firefox ESR 91.3 6. Package List: Red Hat Enterprise Linux Client (v. 7): Source: firefox-91.3.0-1.el7_9.src.rpm x86_64: firefox-91.3.0-1.el7_9.x86_64.rpm firefox-debuginfo-91.3.0-1.el7_9.x86_64.rpm Red Hat Enterprise Linux Client Optional (v. 7): x86_64: firefox-91.3.0-1.el7_9.i686.rpm Red Hat Enterprise Linux Server (v. 7): Source: firefox-91.3.0-1.el7_9.src.rpm ppc64: firefox-91.3.0-1.el7_9.ppc64.rpm firefox-debuginfo-91.3.0-1.el7_9.ppc64.rpm ppc64le: firefox-91.3.0-1.el7_9.ppc64le.rpm firefox-debuginfo-91.3.0-1.el7_9.ppc64le.rpm s390x: firefox-91.3.0-1.el7_9.s390x.rpm firefox-debuginfo-91.3.0-1.el7_9.s390x.rpm x86_64: firefox-91.3.0-1.el7_9.x86_64.rpm firefox-debuginfo-91.3.0-1.el7_9.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 7): x86_64: firefox-91.3.0-1.el7_9.i686.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: firefox-91.3.0-1.el7_9.src.rpm x86_64: firefox-91.3.0-1.el7_9.x86_64.rpm firefox-debuginfo-91.3.0-1.el7_9.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): x86_64: firefox-91.3.0-1.el7_9.i686.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-2021-38503 https://access.redhat.com/security/cve/CVE-2021-38504 https://access.redhat.com/security/cve/CVE-2021-38506 https://access.redhat.com/security/cve/CVE-2021-38507 https://access.redhat.com/security/cve/CVE-2021-38508 https://access.redhat.com/security/cve/CVE-2021-38509 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 iQIVAwUBYYKzf9zjgjWX9erEAQiPSxAAkm9Xsk+IjqbGarDm8gOZsdcBV7w7DKxg rRaWyub0C/OBjaTbWEdgRV5U/A+Z/nK6wQbKki+D+cM2US5C0Do2wroy8jeQdthU UeXgomaSvn4tAHtugoyTrT3XWWFjq0Tk4l9wJOupBcd6jqsRz2IogOshRmjMZsv1 bupboKmVgrHbomEijX8LG+yb7AuAW2Qxu/KA6uYu+tZzQMqtYa96+PNkGdPaF9qe rEJ/yP+z6nSprwbQj4zh5tHJT1gbie7wjlSRp7eu4Ba22z9D1Gbb8/ENoYm1wj+A O8lmrtomeAkGKL9FhfWif3hDyCy5tfEi+VahQfjgTULPewsEc4kX25hF1p+vRUNm TBdkbUjiRu+S6mwlH7a4oMuC5ffo7v3NKAPDOR19oKlFHx5uJgnN5BCKErK340rL 1wrqxqGV6to7aVXKIxOoZoVIZvY9rP0wpMaN74ZEz2bqEUMxXKZQS1JJTe1g6hQJ /lvXb2zHnraKvgpsjOvaeL6lk9CviWwHk8XLN/mvjBxaN+Y9ipoBEIP1fJKbJMhV eFG+qUvbUdgZ9BqhHVrogO4mGtqYkwTwn6guRbc8MIit9prdBDCM/wB+wiDoPfio OJsEHBaHfEJ9P7wgbVK63rwlyxYFoBQf6h5Qv93BLfzLJyh/LY4FJY4EBnNwT/2d I+BdFiSnL98=7jpj -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce