CVE-2003-0190

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    CVE-2003-0190

    Published: 12 May 2003Last Modified: 10 Apr 2026

    Summary:

    Details: OpenSSH-portable (OpenSSH) 3.6.1p1 and earlier with PAM support enabled immediately sends an error message when a user does not exist, which allows remote attackers to determine valid usernames via a timing attack.

    References: http://lab.mediaservice.net/advisory/2003-01-openssh.txt, http://marc.info/?l=bugtraq&m=105172058404810&w=2, http://marc.info/?l=bugtraq&m=106018677302607&w=2, http://www.securityfocus.com/bid/7467, https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf, http://www.securityfocus.com/bid/7467, http://www.securityfocus.com/bid/7467, http://lists.grok.org.uk/pipermail/full-disclosure/2003-April/004815.html, http://www.redhat.com/support/errata/RHSA-2003-222.html, http://www.redhat.com/support/errata/RHSA-2003-224.html, http://www.securityfocus.com/bid/7467, http://www.turbolinux.com/security/TLSA-2003-31.txt, https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A445

    Affected packages

    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