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Many static methods in standard Java APIs vary their behavior according to the immediate caller's class. Such methods are considered to be caller-sensitive. For example, the java.lang.System.loadLibrary(library) method uses the immediate caller's class loader to find and dynamically load the specified library containing native method definitions. Because native code bypasses all of the security checks enforced by the Java Runtime Environment and other built-in protections provided by the Java virtual machine, only trusted code should be allowed to load native libraries. None of the loadLibrary methods in the standard APIs should be invoked on behalf of untrusted code since untrusted code may not have the necessary permissions to load the same libraries using its own class loader instance [Oracle 2014].
Noncompliant Code Example
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CWE-111. Direct use of unsafe JNI | |
Guideline 9-9. Safely invoke standard APIs that perform tasks using the immediate caller's class loader instance |
Bibliography
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