CVE-2018-15599

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    CVE-2018-15599

    Published: 21 Aug 2018Last Modified: 16 Apr 2026

    Summary:

    Details: The recv_msg_userauth_request function in svr-auth.c in Dropbear through 2018.76 is prone to a user enumeration vulnerability because username validity affects how fields in SSH_MSG_USERAUTH messages are handled, a similar issue to CVE-2018-15473 in an unrelated codebase.

    References: https://matt.ucc.asn.au/dropbear/CHANGES, http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002108.html, http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002109.html, https://lists.debian.org/debian-lts-announce/2018/08/msg00026.html, https://old.reddit.com/r/blackhat/comments/97ywnm/openssh_username_enumeration/e4e05n2/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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