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Red Hat Enterprise Linux 8: RHSA-2021-0990-01 Critical Firefox Update

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 Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: firefox security update Advisory ID: RHSA-2021:0990-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:0990 Issue date: 2021-03-25 CVE Names: CVE-2021-23981 CVE-2021-23982 CVE-2021-23984 CVE-2021-23987 ==================================================================== 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 Critical. 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 78.9.0 ESR. Security Fix(es): * Mozilla: Texture upload into an unbound backing buffer resulted in an out-of-bound read (CVE-2021-23981) * Mozilla: Memory safety bugs fixed in Firefox 87 and Firefox ESR 78.9 (CVE-2021-23987) * Mozilla: Internal network hosts could have been probed by a malicious webpage (CVE-2021-23982) * Mozilla: Malicious extensions could have spoofed popup information (CVE-2021-23984) 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/): 1942783 - CVE-2021-23981 Mozilla: Texture upload into an unbound backing buffer resulted in an out-of-bound read 1942785 - CVE-2021-23982 Mozilla: Internal network hosts could have been probed by a malicious webpage 1942786 - CVE-2021-23984 Mozilla: Malicious extensions could have spoofed popup information 1942787 - CVE-2021-23987 Mozilla: Memory safety bugs fixed in Firefox 87 and Firefox ESR 78.9 6. Package List: Red Hat Enterprise Linux AppStream (v. 8): Source: firefox-78.9.0-1.el8_3.src.rpm aarch64: firefox-78.9.0-1.el8_3.aarch64.rpm firefox-debuginfo-78.9.0-1.el8_3.aarch64.rpm firefox-debugsource-78.9.0-1.el8_3.aarch64.rpm ppc64le: firefox-78.9.0-1.el8_3.ppc64le.rpm firefox-debuginfo-78.9.0-1.el8_3.ppc64le.rpm firefox-debugsource-78.9.0-1.el8_3.ppc64le.rpm s390x: firefox-78.9.0-1.el8_3.s390x.rpm firefox-debuginfo-78.9.0-1.el8_3.s390x.rpm firefox-debugsource-78.9.0-1.el8_3.s390x.rpm x86_64: firefox-78.9.0-1.el8_3.x86_64.rpm firefox-debuginfo-78.9.0-1.el8_3.x86_64.rpm firefox-debugsource-78.9.0-1.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-2021-23981 https://access.redhat.com/security/cve/CVE-2021-23982 https://access.redhat.com/security/cve/CVE-2021-23984 https://access.redhat.com/security/cve/CVE-2021-23987 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 PGPSIGNATURE----- Version: GnuPG v1 iQIVAwUBYFyAAtzjgjWX9erEAQirJw//ZQSfRg/bS5xad2fmeYdPv30SPQ7e6N0l LDQdDIJ56IzB0jL8WoYnqdw5jbe0aO4CX2SyyYOldAq4K+1y+uPTDKg4NiArNs3q 2K32sXUwS68QkjaBpPnNHPmvVPKxkP85UFuA5tS49vo9Dzs+9ZrPbAeIUOO55a7T 6VIduBL8Nl/WWT1mtcua41na48ue6V/z3W6fVCDGgJgi855UDM+I3d0bS5deTRWf FcIkUDLUmdh7D+6WFHZEqBtinaO0YMJaT3bbnOsvCxHdxvSuNnR4ICd7t8XgWH4E 2AzXAWHcwy2DtsWWFH9njuPyXAeQ714vtSrst8SiE/kGegtR00xOsazmcY8tOsHE QMpnWpB5OPDWyyEnvcHsK84gHTezP/E5wejYoSG5B4rHIXvdren1byDpcQxP5T62 8yRtbCS0waXTQtWF5ns03PiB/zXLmDYj4w942olhj7f/SjPRC8SNDO8UEVoJnIep KywmUBzGIyzCIenNXs7pMgR6FUscqsEtYST0V6OVoS2I9wPDkAMcTe96WuRhmGU4 O/+KgvgIB70lq88DL/SmeRwUgp+aQKnY7ytnXmnb+SY91N933B4wTbgPIvclYd1j xjJfNuatkjcUpD8cLyb3F5Qa5kKhpxU1NLjM5G9u0t4VT2puuDsE44Soj7BJutH4 z/QEBGJuKb8=EUt2 -----END PGP SIGNATURE----- -- RHSA-announce mailing list This email address is being protected from spambots. You need JavaScript enabled to view it. https://listman.redhat.com/mailman/listinfo/rhsa-announce . Important security update for Mozilla Firefox on Red Hat Enterprise Linux 8 resolves various vulnerabilities. Secure your system immediately!. firefox update, Red Hat security, Critical security advisory. . Severity: Critical. LinuxSecurity.com Team

Mar 25, 2021 •Critical Red Hat