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    CVE-2003-1433

    Epic Games Unreal Engine 226f through 436 does not validate the challenge key, which allows remote attackers to exhaust the player limit by joining the game multiple times.

    Published:Dec 31, 2003
    Last Modified:Apr 16, 2026
    EPS:Oct 23, 2007
    EPSS Score:0.00621
    CVSS Score:4.3

    Affected Products

    Vendor
    Epic Games
    Product
    Unreal Engine

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-287 Improper Authentication

    Related CVEs

    CVE-2007-4442 (CVSS 5) — Stack-based buffer overflow in the logging function in the Unreal engine, possibly 2003 and 2004, as used in t…
    CVE-2007-4443 (CVSS 5) — The UCC dedicated server for the Unreal engine, possibly 2003 and 2004, on Windows allows remote attackers to …
    CVE-2004-1958 (CVSS 5) — Directory traversal vulnerability in manifest.ini in Unreal engine allows remote attackers to overwrite arbitr…
    CVE-2004-1805 (CVSS 5) — Format string vulnerability in games using the Epic Games Unreal Engine 436 allows remote attackers to cause a…
    CVE-2004-0608 (CVSS 10) — The Unreal Engine, as used in DeusEx 1.112fm and earlier, Devastation 390 and earlier, Mobile Forces 20000 and…
    CVE-2003-1432 (CVSS 10) — Epic Games Unreal Engine 226f through 436 allows remote attackers to cause a denial of service (CPU consumptio…
    CVE-2003-1430 (CVSS 5) — Directory traversal vulnerability in Unreal Tournament Server 436 and earlier allows remote attackers to acces…
    CVE-2003-1431 (CVSS 7.1) — Buffer overflow in Epic Games Unreal Engine 226f through 436 allows remote attackers to cause a denial of serv…

    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