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    J2EE Misconfiguration: Invalid Servlet Name

    ABSTRACT

    無效的 servlet 名稱會造成用戶無法正常訪問所需的 Servlet。

    EXPLANATION

    web.xml 中缺少 servlet 名稱或包含重復的 servlet 名稱均為錯誤。每個 Servlet 都應有一個唯一的名稱 (servlet-name) 及相應的映射 (servlet-mapping)。



    例 1:以下 web.xml 中的條目顯示了幾個錯誤的 servlet 定義。


    <!-- No <servlet-name> specified:-->
    <servlet>
    <servlet-class>com.class.MyServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
    </servlet>

    <!-- Empty <servlet-name> node:-->
    <servlet>
    <servlet-name/>
    <servlet-class>com.class.MyServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
    </servlet>

    <!-- Duplicate <servlet-name> nodes:-->
    <servlet>
    <servlet-name>MyServlet</servlet-name>
    <servlet-name>Servlet</servlet-name>
    <servlet-class>com.class.MyServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
    </servlet>

    這些錯誤可能導致錯誤地拒絕訪問 Servlet。

    REFERENCES

    [1] Standards Mapping - OWASP Top 10 2004 - (OWASP 2004) A9 Application Denial of Service

    [2] Standards Mapping - Security Technical Implementation Guide Version 3 - (STIG 3) APP6080 CAT II

    [3] Standards Mapping - Security Technical Implementation Guide Version 3.4 - (STIG 3.4) APP6080 CAT II

    [4] Standards Mapping - Common Weakness Enumeration - (CWE) CWE ID 730

    [5] Sun Microsystems, Inc. Java Servlet Specification 2.4

    [6] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 - (PCI 1.1) Requirement 6.5.9


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