Encountering some troubles with Nashorn and came across a concerning security vulnerability highlighted here:
It appears that someone can easily execute code using this command:
this.engine.factory.scriptEngine.eval('java.lang.Runtime.getRuntime().exec("whatever")')Unfortunately, this vulnerability is impacting my website. Any suggestions on how to address this?
This informative piece guides you with crucial information.
It is important to note that the introduction of logic in the security pathway restricts access to the
enginesolely when both aSecurityManagerand aClassFilterare in place. Oracle has confirmed that this behavior is intentional.Therefore, even following the patch for CVE-2018-3183, if a
SecurityManageris not active, theengineproperty remains accessible to all scripts, regardless of aClassFilterblocking access to Java classes.
From a security standpoint, relying solely on a ClassFilter is inadequate; a SecurityManager is also necessary. The disabling of the code providing the engine property occurs only when both components are present.
(It appears that any security manager can be used - even one that permits all actions. However, for security purposes, or if permitting access to this.engine is desired, it may be advisable to utilize a subclass of SecurityManager that at a minimum rejects attempts to spawn processes or change the current security manager. Implementing a default block approach, with allowances for specific actions, may be preferable. It is recommended to prevent unauthorized file writing, network connections, etc.)
After establishing such a security manager, activate it by executing
System.setSecurityManager(yourSecurityManager);$scope.isChecked = function(id){ var i=0,j=0,k=0; //$scope.abc[i].usertype[j].keywords[0].key_bool=true; if($scope.abc[i].type_selected == true){ while($scope.abc[i].usertype.length){ while($scope.abc[i].userty ...
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