RLSA-2021:2883

    Dashboard / Vulnerabilities / RLSA-2021:2883

    RLSA-2021:2883

    Published: 26 Jul 2021Last Modified: 4 Feb 2026

    Summary: Important: thunderbird security update

    Details: Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.12.0. Security Fix(es): * Mozilla: IMAP server responses sent by a MITM prior to STARTTLS could be processed (CVE-2021-29969) * Mozilla: Use-after-free in accessibility features of a document (CVE-2021-29970) * Mozilla: Memory safety bugs fixed in Firefox 90 and Firefox ESR 78.12 (CVE-2021-29976) * chromium-browser: Out of bounds write in ANGLE (CVE-2021-30547) 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.

    References: https://errata.rockylinux.org/RLSA-2021:2883, https://bugzilla.redhat.com/show_bug.cgi?id=1970109, https://bugzilla.redhat.com/show_bug.cgi?id=1982013, https://bugzilla.redhat.com/show_bug.cgi?id=1982014, https://bugzilla.redhat.com/show_bug.cgi?id=1982015

    Affected packages

    Package

    Name: thunderbird

    Purl: pkg:rpm/rocky-linux/thunderbird?distro=rocky-linux-8-4-legacy&epoch=0

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0:78.12.0-3.el8_4

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    RLSA-2021:2883 | CVE-DB