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                    Access Control: Amazon Web Services

                    ABSTRACT

                    如果在使用用戶控制的項名稱且沒有適當 access control 的情形下訪問 SimpleDB 數據庫,則會允許攻擊者查看未經授權的記錄。

                    EXPLANATION

                    Database access control 錯誤在以下情況下發生:

                    1. 數據從一個不可信賴的數據源進入程序。


                    2. 此數據被用于指定 SimpleDB 訪問調用中的項目名。


                    例 1:以下代碼對在事務日期后命名的清單數據庫進行操作。此程序首先驗證客戶,然后使客戶能夠從以前的清單列表中選擇。


                    ...
                    String selectedInvoice = request.getParameter("invoiceDate");
                    ...
                    AmazonSimpleDBClient sdbc = new AmazonSimpleDBClient(appAWSCredentials);
                    GetAttributesResult sdbResult = sdbc.getAttributes(new GetAttributesRequest("invoices", selectedInvoice));
                    ...


                    雖然例 1 中的代碼生成了一個當前用戶的清單列表,但是攻擊者可以繞過這個代碼行為,從而獲取所需的任何清單。因為此例中的代碼沒有執行檢查,確保用戶有權訪問需要的清單,所以代碼會顯示所有清單,即使這些清單并不屬于當前用戶。

                    REFERENCES

                    [1] Standards Mapping - OWASP Top 10 2004 - (OWASP 2004) A2 Broken Access Control

                    [2] Standards Mapping - OWASP Top 10 2007 - (OWASP 2007) A4 Insecure Direct Object Reference

                    [3] Standards Mapping - OWASP Top 10 2010 - (OWASP 2010) A4 Insecure Direct Object References

                    [4] Standards Mapping - FIPS200 - (FISMA) AC

                    [5] Standards Mapping - Security Technical Implementation Guide Version 3 - (STIG 3) APP3510 CAT I

                    [6] Standards Mapping - Security Technical Implementation Guide Version 3.4 - (STIG 3.4) APP3510 CAT I

                    [7] Standards Mapping - Common Weakness Enumeration - (CWE) CWE ID 566

                    [8] Standards Mapping - Web Application Security Consortium 24 + 2 - (WASC 24 + 2) Insufficient Authorization

                    [9] Standards Mapping - SANS Top 25 2011 - (SANS Top 25 2011) Porous Defenses - CWE ID 863

                    [10] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 - (PCI 1.1) Requirement 6.5.2

                    [11] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 - (PCI 1.2) Requirement 6.5.4

                    [12] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 - (PCI 2.0) Requirement 6.5.8


                    Copyright 2013 Fortify Software - All rights reserved.
                    (Generated from version 2013.1.1.0008 of the Fortify Secure Coding Rulepacks)
                    desc.dataflow.java.access_control_amazon_web_services

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