-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: thunderbird security update Advisory ID: RHSA-2021:0993-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:0993 Issue date: 2021-03-25 CVE Names: CVE-2021-23981 CVE-2021-23982 CVE-2021-23984 CVE-2021-23987 ===================================================================== 1. Summary: An update for thunderbird 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, x86_64 3. Description: Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.9.0. 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 All running instances of Thunderbird must be restarted for the update 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: thunderbird-78.9.0-3.el8_3.src.rpm aarch64: thunderbird-78.9.0-3.el8_3.aarch64.rpm thunderbird-debuginfo-78.9.0-3.el8_3.aarch64.rpm thunderbird-debugsource-78.9.0-3.el8_3.aarch64.rpm ppc64le: thunderbird-78.9.0-3.el8_3.ppc64le.rpm thunderbird-debuginfo-78.9.0-3.el8_3.ppc64le.rpm thunderbird-debugsource-78.9.0-3.el8_3.ppc64le.rpm x86_64: thunderbird-78.9.0-3.el8_3.x86_64.rpm thunderbird-debuginfo-78.9.0-3.el8_3.x86_64.rpm thunderbird-debugsource-78.9.0-3.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 PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYFyJP9zjgjWX9erEAQgHhw/+MeSbv23PGyUuJiudJOexW1n5gjh+sTaM etnt8tQ90dA8coPvFPU7w3OC1sG6r1fg4T4ySoQ0kTkgWFApT0t4FG5n6bWNa0Un Ji57jOG62ImSFz+TWPz96BPXh781z5yX94mWR0ZTHkk+Gj/ncTglLBv/NuFSzEro DH+0TW5NJExppw+sN/vs+3dVRY/72Mm55MX+FFGEKyyErW9Mu8xwqeN4bId2PDiQ Z/xcrJv2xE+rta87Zw7UvTd4ls9SD2lebNGpov1aFabFd2bPyS6o2qy0YkIbio8l oOnrs9YdTJ334lLTz8v9g0OuxgMgEUZYaR0/hZQbcjvh86tzUW6XSYlJyI0qzYdI wYqkJyaTzVcKa3Osta4wDiv9/EVzktxGgL5qU8nWbuFr37L1A6lrM1MekZhV4wTg JX/+D92u8O66/ietVmCelI135frKGBNhNl4gbpqkMEf99neCYm8KeQ4aMxovjcY8 ycPm2bD3uIwPPZQVo64JGvURJHd+AEk++GTO/6FSs4R2paZjuQ3b5/aYuqXoNbYE NnnfD0VnlwjmDoK5rVBNRd9wxOnLS2A6eLuvNuY5uuKq+V9/QaFV983KEO2Uka81 RRnKjtPtrh4RzQbH9HhNP4vh4t0NzMACH0GFaiSB7f//L/tADnjRq8Tg5esL2vK1 KJ+MGJfeFyQ= =7qFM -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce