mcp-server-semgrep/semgrep-rules/java/lang/security/audit/el-injection.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: el-injection
  metadata:
    cwe:
    - "CWE-94: Improper Control of Generation of Code ('Code Injection')"
    owasp:
    - A03:2021 - Injection
    source-rule-url: https://find-sec-bugs.github.io/bugs.htm#EL_INJECTION
    category: security
    technology:
    - java
    references:
    - https://owasp.org/Top10/A03_2021-Injection
    cwe2022-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: HIGH
    confidence: LOW
  message: >-
    An expression is built with a dynamic value. The source of the value(s) should
    be verified to avoid that unfiltered values fall into this risky code evaluation.
  severity: WARNING
  languages: [java]
  patterns:
  - pattern-either:
    - pattern: |
        class $CLASS {
          ...
          ExpressionFactory $EF;
          ...
          $X $METHOD(...) {
            ...
            $EF.createValueExpression($CTX,$INPUT,...);
            ...
          }
          ...
        }
    - pattern: |
        class $CLASS {
          ...
          ExpressionFactory $EF = ...;
          ...
          $X $METHOD(...) {
            ...
            $EF.createValueExpression($CTX,$INPUT,...);
            ...
          }
          ...
        }
    - pattern: |
        $X $METHOD(...) {
          ...
          ExpressionFactory $EF = ...;
          ...
          $EF.createValueExpression($CTX,$INPUT,...);
          ...
        }
    - pattern: |
        $X $METHOD(...,ExpressionFactory $EF,...) {
          ...
          $EF.createValueExpression($CTX,$INPUT,...);
          ...
        }
    - pattern: |
        class $CLASS {
          ...
          ExpressionFactory $EF;
          ...
          $X $METHOD(...) {
            ...
            $EF.createMethodExpression($CTX,$INPUT,...);
            ...
          }
          ...
        }
    - pattern: |
        class $CLASS {
          ...
          ExpressionFactory $EF = ...;
          ...
          $X $METHOD(...) {
            ...
            $EF.createMethodExpression($CTX,$INPUT,...);
            ...
          }
          ...
        }
    - pattern: |
        $X $METHOD(...) {
          ...
          ExpressionFactory $EF = ...;
          ...
          $EF.createMethodExpression($CTX,$INPUT,...);
          ...
        }
    - pattern: |
        $X $METHOD(...,ExpressionFactory $EF,...) {
          ...
          $EF.createMethodExpression($CTX,$INPUT,...);
          ...
        }
    - pattern: |
        $X $METHOD(String $INPUT, ...) {
          ...
          $OBJECT.buildConstraintViolationWithTemplate($INPUT, ...);
          ...
        }
  - pattern-not: |
      $X $METHOD(...) {
        ...
        $EF.createValueExpression($CTX,"...",...);
        ...
      }
  - pattern-not: |
      $X $METHOD(...) {
        ...
        String $S = "...";
        ...
        $EF.createValueExpression($CTX,$S,...);
        ...
      }
  - pattern-not: |
      $X $METHOD(...) {
        ...
        $EF.createMethodExpression($CTX,"...",...);
        ...
      }
  - pattern-not: |
      $X $METHOD(...) {
        ...
        String $S = "...";
        ...
        $EF.createMethodExpression($CTX,$S,...);
        ...
      }