-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: firefox security update Advisory ID: RHSA-2021:4605-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:4605 Issue date: 2021-11-10 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 8.2 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. 2. Relevant releases/architectures: Red Hat Enterprise Linux AppStream EUS (v. 8.2) - 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 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 AppStream EUS (v. 8.2): Source: firefox-91.3.0-1.el8_2.src.rpm aarch64: firefox-91.3.0-1.el8_2.aarch64.rpm firefox-debuginfo-91.3.0-1.el8_2.aarch64.rpm firefox-debugsource-91.3.0-1.el8_2.aarch64.rpm ppc64le: firefox-91.3.0-1.el8_2.ppc64le.rpm firefox-debuginfo-91.3.0-1.el8_2.ppc64le.rpm firefox-debugsource-91.3.0-1.el8_2.ppc64le.rpm s390x: firefox-91.3.0-1.el8_2.s390x.rpm firefox-debuginfo-91.3.0-1.el8_2.s390x.rpm firefox-debugsource-91.3.0-1.el8_2.s390x.rpm x86_64: firefox-91.3.0-1.el8_2.x86_64.rpm firefox-debuginfo-91.3.0-1.el8_2.x86_64.rpm firefox-debugsource-91.3.0-1.el8_2.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-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 iQIVAwUBYYvZutzjgjWX9erEAQh75g/5ATQGBmGnXn8oYgk26XwQgQ9AbtztS6yh kqu8gv9ldE2jjDYw6ui2GQ0oU9wtSEFfEB4m4yzm4XNPFn7n5L9zExsLdTS1ptSh 6C9q/qt23bhEdotMkQqj1BR73r7ZQZO4n2xjcScprVhCaXMr+cDFy6Ga/4IL27BA kOH20FDUV5djwzRSBUY+fN/EU/IXTrnS/R3XN5Bz9LsYUqxz2bADQ6Yi9PjdVm7l Lbdzdvz7/7smwu3bUJb8AHdMivUrAOsaywlJga2svtjpTBABA7DExY1c1+WR6koR BeMUvfQRRflvT2WsNNcJHTKuvUhkl6yzQ8fyHo7eoiDvbnODGyTetS8H4yAihads BPOIgrPrw976zCLkpaDgbTEYTSq3b4ry2l+bGU8s6cx4maiKs+GyXtO2TstL6fSO R4JoRqKP4UoXgB6qe+Z8nl0wYhzNEEx8bP3TOo0ezCcCDke6cFrqQnbIhIHS7D4E 9VR2aAaptdV+wdMy/TRa6vU5zzHTCzv6r8aR4IHGu1yWae9mQhILlIkdE/0iAZss eJz1A2jd8HzYFenyW+fN56U00gHcajMv8Jd3tuh7EbqHjOtR7P8X9Z3XqJZlPAO7 sFUxWwA3Xo2kay5h9K+ftwO0qZuWu7CDdPl6l+ScdUNuC2lkj1JcxpJ2G49GZ23h cDqMruRchx0=zL0T -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce