UBUNTU-CVE-2021-29957

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    UBUNTU-CVE-2021-29957

    Published: 28 May 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-29957

    Summary:

    Details: If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected. This vulnerability affects Thunderbird < 78.10.2.

    References: https://ubuntu.com/security/CVE-2021-29957, https://www.mozilla.org/en-US/security/advisories/mfsa2021-22/#CVE-2021-29957, https://ubuntu.com/security/notices/USN-4995-1, https://ubuntu.com/security/notices/USN-4995-2, https://www.cve.org/CVERecord?id=CVE-2021-29957

    Affected packages

    Package

    Name: thunderbird

    Purl: pkg:deb/ubuntu/thunderbird@1:78.11.0+build1-0ubuntu0.18.04.2?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:78.11.0+build1-0ubuntu0.18.04.2

    Affected versions

    1:52.4.0+build1-0ubuntu2

    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
    UBUNTU-CVE-2021-29957 | CVE-DB