CVE-2002-1336

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    CVE-2002-1336

    Published: 11 Dec 2002Last Modified: 10 Apr 2026

    Summary:

    Details: TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.

    References: http://www.mandrakesoft.com/security/advisories?name=MDKSA-2003:022, http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000640, http://marc.info/?l=bugtraq&m=102753170201524&w=2, http://marc.info/?l=bugtraq&m=102769183913594&w=2, http://www.redhat.com/support/errata/RHSA-2002-287.html, http://www.redhat.com/support/errata/RHSA-2003-041.html, http://www.securityfocus.com/bid/5296, http://www.tightvnc.com/WhatsNew.txt, https://exchange.xforce.ibmcloud.com/vulnerabilities/5992

    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