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#3 A03:2021

Injection

Injection flaws occur when an application sends hostile data to an interpreter. This includes SQL, NoSQL, OS command, ORM, LDAP, and Expression Language injection.

概述

Injection slides down to #3. 94% of applications were tested for some form of injection. The 33 CWEs mapped into this category have the second most occurrences in applications.

攻击者如何利用此漏洞

理解攻击模式有助于您构建更好的防御。这些是安全团队监控的技术。

SQL query manipulation

User input is incorporated into database queries without proper sanitization, allowing attackers to modify query logic or extract unauthorized data.

检测信号: Database errors in responses, unusual query patterns in logs, timing anomalies

Command execution

User input flows into system commands, allowing attackers to execute arbitrary commands on the server.

检测信号: Unexpected process spawns, unusual system calls in audit logs

Script injection in pages

User content is reflected in web pages without encoding, allowing script execution in other users' browsers.

检测信号: Script tags or event handlers appearing in user-generated content

如何预防

  • Use a safe API which avoids using the interpreter entirely
  • Use parameterized queries or prepared statements
  • Use positive server-side input validation
  • Escape special characters for any residual dynamic queries
  • Use LIMIT and other SQL controls to prevent mass disclosure

有Shoulder检测的CWE (9)

这些CWE有Shoulder检测规则。点击查看具体漏洞和修复方法。

其他映射的CWE (24)

这些CWE映射到此类别,但尚无Shoulder规则。