引言
SQL注入是一种常见的网络安全漏洞，它允许攻击者未经授权访问、修改或删除数据库中的数据。AWVS（Acunetix Web Vulnerability Scanner）是一款流行的网络安全扫描工具，可以检测包括SQL注入在内的多种Web应用程序漏洞。本文将深入探讨AWVS如何检测SQL注入，并提供一些实战技巧和风险防范措施。
AWVS检测SQL注入的原理
1. 检测机制
AWVS通过发送特殊的SQL注入测试字符串到目标应用程序的URL，然后分析应用程序的响应来判断是否存在SQL注入漏洞。
2. 测试字符串
AWVS使用一系列预定义的SQL注入测试字符串，例如： “`sql ‘ OR ‘1’=‘1 ’ OR ‘1’=‘1’ UNION SELECT NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 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