界: Input Validation and Representation

輸入驗證和表示法問題是由中繼字元、替代編碼和數值表示法引起的。信任輸入會導致安全問題。問題包括：「Buffer Overflows」、「Cross-Site Scripting」攻擊、「SQL Injection」及其他許多問題。

Cross-Site Scripting: External Links

Java/JSP

Abstract

傳送未經驗證的資料至網路瀏覽器，會導致瀏覽器執行惡意的程式碼。組態中的設定可盡量降低暴露於 Cross-Site Scripting 的風險

Explanation

Cross-Site Scripting (XSS) 弱點會在以下情況中出現：

1.資料透過不可信賴的來源進入 Web 應用程式，通常是一個網頁要求或資料庫。

2.未經驗證且包含在動態內容中的資料將傳送給某個網頁使用者。

傳送到網頁瀏覽器的惡意內容經常是以 JavaScript 片段的形式出現，但是也可能包含 HTML、Flash 或者瀏覽器執行的任何其他程式碼類型。以 XSS 為基礎的攻擊手段花樣百出且幾乎無窮無盡，但是它們通常會傳輸 Cookie 或其他階段作業資訊之類的私人資料給攻擊者、將受害者重新導向到攻擊者控制的網頁內容，或者利用易受攻擊的網站，在使用者的機器上執行其他惡意操作。

因為針對 XSS 弱點的攻擊通常與攻擊者所控制惡意網站之間的通訊或重新導向動作有關，可以插入導向至其他網域內容的參照，對惡意程式而言，更如虎添翼。您可將 AntiSamy 設定為避免連線至外部網域的連結，也就可以降低攻擊者可能透過 XSS 攻擊所造成的損害。但是，這種保護機制只解決了部分問題，而且無法解決 XSS 弱點所造成的整體威脅。

範例 1：以下 AntiSamy 組態項目允許連結到應用程式執行網域以外的 URL。


		<attribute name="href" onInvalid="filterTag">
			<regexp-list>
				<regexp name="onsiteURL"/>
				<regexp name="offsiteURL"/>
			</regexp-list>
		</attribute>

References

[1] Understanding Malicious Content Mitigation for Web Developers CERT

[2] HTML 4.01 Specification W3

[3] Standards Mapping - Common Weakness Enumeration CWE ID 79, CWE ID 82, CWE ID 83, CWE ID 87, CWE ID 692

[4] Standards Mapping - Common Weakness Enumeration Top 25 2019 [2] CWE ID 079

[5] Standards Mapping - Common Weakness Enumeration Top 25 2020 [1] CWE ID 079

[6] Standards Mapping - Common Weakness Enumeration Top 25 2021 [2] CWE ID 079

[7] Standards Mapping - Common Weakness Enumeration Top 25 2022 [2] CWE ID 079

[8] Standards Mapping - Common Weakness Enumeration Top 25 2023 [2] CWE ID 079

[9] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001167, CCI-001310

[10] Standards Mapping - FIPS200 SI

[11] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data

[12] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-18 Mobile Code (P2), SI-10 Information Input Validation (P1)

[13] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-18 Mobile Code, SI-10 Information Input Validation

[14] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.3 Output Encoding and Injection Prevention Requirements (L1 L2 L3), 5.3.6 Output Encoding and Injection Prevention Requirements (L1 L2 L3)

[15] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection

[16] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation

[17] Standards Mapping - OWASP Top 10 2004 A4 Cross Site Scripting

[18] Standards Mapping - OWASP Top 10 2007 A1 Cross Site Scripting (XSS)

[19] Standards Mapping - OWASP Top 10 2010 A2 Cross-Site Scripting (XSS)

[20] Standards Mapping - OWASP Top 10 2013 A3 Cross-Site Scripting (XSS)

[21] Standards Mapping - OWASP Top 10 2017 A7 Cross-Site Scripting (XSS)

[22] Standards Mapping - OWASP Top 10 2021 A03 Injection

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.4

[24] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.1

[25] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.7

[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.7

[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.7

[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.7

[29] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.7

[30] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4

[31] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection

[32] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation

[33] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation

[34] Standards Mapping - SANS Top 25 2009 Insecure Interaction - CWE ID 116

[35] Standards Mapping - SANS Top 25 2010 Insecure Interaction - CWE ID 079

[36] Standards Mapping - SANS Top 25 2011 Insecure Interaction - CWE ID 079

[37] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I, APP3580 CAT I

[38] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3580 CAT I

[39] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3580 CAT I

[40] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3580 CAT I

[41] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3580 CAT I

[42] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3580 CAT I

[43] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3580 CAT I

[44] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[45] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[46] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[47] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[48] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[49] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[50] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[51] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[52] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[53] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[54] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[55] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[56] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[57] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002490 CAT I, APSC-DV-002530 CAT II, APSC-DV-003300 CAT II

[58] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002490 CAT I, APSC-DV-002530 CAT II, APSC-DV-003300 CAT II

[59] Standards Mapping - Web Application Security Consortium Version 2.00 Cross-Site Scripting (WASC-08)

[60] Standards Mapping - Web Application Security Consortium 24 + 2 Cross-Site Scripting

desc.config.java.xss_external_links