CVE-2019-10691

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    CVE-2019-10691

    Published: 24 Apr 2019Last Modified: 8 Jul 2026

    Summary:

    Details: The JSON encoder in Dovecot before 2.3.5.2 allows attackers to repeatedly crash the authentication service by attempting to authenticate with an invalid UTF-8 sequence as the username.

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QHFZ5OWRIZGIWZJ5PTNVWWZNLLNH4XYS/, http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00000.html, http://www.openwall.com/lists/oss-security/2019/04/18/3, https://dovecot.org/list/dovecot-news/2019-April/000406.html, https://security.gentoo.org/glsa/201908-29

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -38c8f1daff9edd8a79d1f523abcdda84d874e496

    Affected versions

    2.3.5.1
    2.3.5

    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