Summary
Because of the missing checkLink(String) override in the SecurityManager, students can load libraries and execute arbitrary code.
Details
Using System.load(String) or System.loadLibrary(String) students can load and execute arbitrary code.
private static native void start(List<String> args);
public static void main(String[] args) {
System.load(new File("path_to_lib.so").getAbsolutePath());
start(List.of(args));
}Adding this to the security manager (and a translation) should fix the issue:
@Override
public void checkExec(String cmd) {
try {
if (enterPublicInterface())
return;
throw new SecurityException(localized("security.error_link")); //$NON-NLS-1$
} finally {
exitPublicInterface();
}
}PoC
See details.
Impact
Arbitrary code execution.
Summary
Because of the missing
checkLink(String)override in the SecurityManager, students can load libraries and execute arbitrary code.Details
Using
System.load(String)orSystem.loadLibrary(String)students can load and execute arbitrary code.Adding this to the security manager (and a translation) should fix the issue:
PoC
See details.
Impact
Arbitrary code execution.