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public class Main {
public static void main(String[] argv) throws Exception {
System.setProperty("java.version", "data");
try {
SecurityManager sm = new SecurityManager();
System.setSecurityManager(sm);
} catch (SecurityException se) {
se.printStackTrace();
}
// no longer possible; an AccessControlException is thrown
System.setProperty("java.version", "malicious data");
}
}
/*Exception in thread "main" java.security.AccessControlException: access denied (java.util.PropertyPermission java.version write)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
at java.security.AccessController.checkPermission(AccessController.java:546)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at java.lang.System.setProperty(System.java:727)
at Main.main(Main.java:13)
*/
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