CVE-2020-14954

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    CVE-2020-14954

    Published: 21 Jun 2020Last Modified: 7 Aug 2026

    Summary:

    Details: Mutt before 1.14.4 and NeoMutt before 2020-06-19 have a STARTTLS buffering issue that affects IMAP, SMTP, and POP3. When a server sends a "begin TLS" response, the client reads additional data (e.g., from a man-in-the-middle attacker) and evaluates it in a TLS context, aka "response injection."

    References: http://www.mutt.org/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EFMEILCBKMZRRZDMUGWLVN4PQQ4VTAZE/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3LXFVPTLK4PNHL6MPKJNJQJ25CH7GLQ/, http://lists.mutt.org/pipermail/mutt-announce/Week-of-Mon-20200615/000023.html, http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00064.html, http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00070.html, https://github.com/neomutt/neomutt/releases/tag/20200619, https://lists.debian.org/debian-lts-announce/2020/06/msg00039.html, https://lists.debian.org/debian-lts-announce/2020/06/msg00040.html, https://security.gentoo.org/glsa/202007-57, https://usn.ubuntu.com/4403-1/, https://www.debian.org/security/2020/dsa-4707, https://www.debian.org/security/2020/dsa-4708, https://gitlab.com/muttmua/mutt/-/issues/248, https://github.com/neomutt/neomutt/commit/fb013ec666759cb8a9e294347c7b4c1f597639cc, https://gitlab.com/muttmua/mutt/-/commit/c547433cdf2e79191b15c6932c57f1472bfb5ff4

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -c94d2b00f41cc7eb2504efc0aeb12646aefb2837

    Affected versions

    mutt-1-14-3-rel

    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
    CVE-2020-14954 | CVE-DB