-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: firefox security update Advisory ID: RHSA-2021:0992-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:0992 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 7. 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 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 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 Client (v. 7): Source: firefox-78.9.0-1.el7_9.src.rpm x86_64: firefox-78.9.0-1.el7_9.x86_64.rpm firefox-debuginfo-78.9.0-1.el7_9.x86_64.rpm Red Hat Enterprise Linux Client Optional (v. 7): x86_64: firefox-78.9.0-1.el7_9.i686.rpm Red Hat Enterprise Linux Server (v. 7): Source: firefox-78.9.0-1.el7_9.src.rpm ppc64: firefox-78.9.0-1.el7_9.ppc64.rpm firefox-debuginfo-78.9.0-1.el7_9.ppc64.rpm ppc64le: firefox-78.9.0-1.el7_9.ppc64le.rpm firefox-debuginfo-78.9.0-1.el7_9.ppc64le.rpm s390x: firefox-78.9.0-1.el7_9.s390x.rpm firefox-debuginfo-78.9.0-1.el7_9.s390x.rpm x86_64: firefox-78.9.0-1.el7_9.x86_64.rpm firefox-debuginfo-78.9.0-1.el7_9.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 7): x86_64: firefox-78.9.0-1.el7_9.i686.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: firefox-78.9.0-1.el7_9.src.rpm x86_64: firefox-78.9.0-1.el7_9.x86_64.rpm firefox-debuginfo-78.9.0-1.el7_9.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): x86_64: firefox-78.9.0-1.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-2021-23981 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 PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYFyRsNzjgjWX9erEAQhurBAAmnxQomQUSwN505p/r/Szrm/QiW10/152 hije78J6KPi3vU5l9YzJDJP1RK9MLLMA66z3iQzdlm1ia1ABN21xKrkDEYGwwlbY vZ3ZCwcursCsM5fvvOhHD76SPbcwV5VmOJX9/UaCUkVpWSUENPHF7Ip5tk9V8vVv QWqGPQ/O1Umf9NTBqPusrj2wwt0+F1pSP+pe1QFaKO/tTeHglwYae1k9OxpbFusN jxIH2edZNS7yOEL49HexvFRqRD/uDzFwWlM+wbtPEkcs5p1rjn65HZMyX/9Pktw2 IxakArPTKv+nzGwTszsQYJr0BdMTbaiw6FIg6ZZN0K87FQf/zhdoivT3fK8wNhQN kMhqsQ+JHjTKvBLiENltZIpXqTWM6Lo4EyViL3DOHJ/q8SVYQELLHgfZGQldBgr/ +vpCx7TbeP3kHnLXG2oKByDXqz6DRFxVhXW9oxAq+QlNGpETK/GZpUNOtI1RKU/e +PMW6bJvYLlW4i008EHLqvs3kFsemesvavZ60pq1/MyDVll6vCBKQ16dg5mZXfcd epoEq7YZzUV5OCpgEWqHXNjhbh1lWR3Gsj8NGQypg/q1ua8CHknNmZ0vcWZ3+MbC eNQdG8vr90PTf/TWPs/+DxqgSwE9rdiD/J2FNQjY+LM401Kss75HHc+5IMCQ3kZb 2WT7/ZV4vfc=QGUa -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce