CVE-2019-11340

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    CVE-2019-11340

    Published: 19 Apr 2019Last Modified: 8 Jul 2026

    Summary:

    Details: util/emailutils.py in Matrix Sydent before 1.0.2 mishandles registration restrictions that are based on e-mail domain, if the allowed_local_3pids option is enabled. This occurs because of potentially unwanted behavior in Python, in which an email.utils.parseaddr call on [email protected]@good.example.com returns the [email protected] substring.

    References: https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/, https://twitter.com/matrixdotorg/status/1118934335963500545, https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc, https://github.com/matrix-org/sydent/compare/7c002cd...09278fb

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -09278fb4945ed5a1e293706e90dde6948ac96eef

    Affected versions

    v1.0.1
    v1.0.0

    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