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    CVE-2002-0964

    Half-Life Server 1.1.1.0 and earlier allows remote attackers to cause a denial of service (resource exhaustion) via multiple responses to the initial challenge with different cd_key values, which reaches the player limit and prevents other players from connecting until the original responses have timed out.

    Published:Oct 4, 2002
    Last Modified:Apr 16, 2026
    EPS:Apr 2, 2003
    EPSS Score:0.06281
    CVSS Score:5

    Affected Products

    Vendor
    Valve Software
    Product
    Half-life
    Vendor
    Valve Software
    Product
    Half-life Dedicated Server

    Exploits

    https://www.exploit-db.com/exploits/21572

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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