UBUNTU-CVE-2019-10691

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    UBUNTU-CVE-2019-10691

    Published: 18 Apr 2019Last Modified: 4 Feb 2026
    Upstream:
    CVE-2019-10691
    Aliases:
    USN-3951-1

    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://ubuntu.com/security/CVE-2019-10691, https://dovecot.org/list/dovecot-news/2019-April/000406.html, https://ubuntu.com/security/notices/USN-3951-1, https://www.cve.org/CVERecord?id=CVE-2019-10691

    Affected packages

    Package

    Name: dovecot

    Purl: pkg:deb/ubuntu/dovecot@1:2.2.9-1ubuntu2.6?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:2.2.9-1ubuntu2.6

    Affected versions

    1:2.1.7-7ubuntu3

    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-2019-10691 | CVE-DB