feat: MVEL guidance hook #1005
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feat: MVEL guidance hook #1005
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Hook to guide inputs to MVEL interpreter towards performing OS commands which are detected by the OS command injection sanitizer.
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Pull Request Overview
This PR adds support for detecting MVEL expression language injection vulnerabilities by implementing a guidance hook that directs fuzzing inputs toward OS command execution patterns that trigger the OS command injection sanitizer.
Key changes:
- Added MVEL guidance hook to detect expression language injection via Runtime.exec() calls
- Implemented fuzz test for MVEL expression evaluation
- Integrated MVEL library (version 2.5.2.Final) as a test dependency
Reviewed Changes
Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.
Show a summary per file
| File | Description |
|---|---|
| ExpressionLanguageInjection.kt | Added MVEL guidance hook with attack pattern and method hooks for various MVEL eval/compile methods |
| ExpressionLanguageInjection.java | Added fuzz test method for MVEL expression evaluation |
| BUILD.bazel (test) | Added MVEL dependency and fuzzMVELExpression to test methods list, expanded allowed findings |
| BUILD.bazel (sanitizers) | Added MVEL dependency for sanitizer tests |
| MODULE.bazel | Added MVEL library to test Maven artifacts |
| maven_install.json | Added MVEL library metadata and updated artifact hashes |
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sanitizers/src/main/java/com/code_intelligence/jazzer/sanitizers/ExpressionLanguageInjection.kt
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sanitizers/src/main/java/com/code_intelligence/jazzer/sanitizers/ExpressionLanguageInjection.kt
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Hook to guide inputs to MVEL interpreter towards performing OS commands which are detected by the OS command injection sanitizer.