UBUNTU-CVE-2020-15685

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    UBUNTU-CVE-2020-15685

    Published: 31 Dec 2020Last Modified: 22 Apr 2026
    Upstream:
    CVE-2020-15685
    Aliases:
    USN-4736-1

    Summary:

    Details: During the plaintext phase of the STARTTLS connection setup, protocol commands could have been injected and evaluated within the encrypted session. This vulnerability affects Thunderbird < 78.7.

    References: https://ubuntu.com/security/CVE-2020-15685, https://www.mozilla.org/en-US/security/advisories/mfsa2021-05/#CVE-2020-15685, https://ubuntu.com/security/notices/USN-4736-1, https://www.cve.org/CVERecord?id=CVE-2020-15685

    Affected packages

    Package

    Name: thunderbird

    Purl: pkg:deb/ubuntu/thunderbird@1:78.8.1+build1-0ubuntu0.18.04.1?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:78.8.1+build1-0ubuntu0.18.04.1

    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-2020-15685 | CVE-DB