Would a blank Java security policy file be the most restrictive?

Would a blank Java security policy file be the most restrictive?

By : user2954538
Date : November 22 2020, 10:31 AM
should help you out Yes, a security policy that grants no permissions is the most restrictive policy you can define with the standard Java Security Manager, and would prevent any code running in that JVM from doing anything that requires a security permission. The Java core API's generally check some variety of security permission before allowing code running under a Security Manager from doing anything that could be harmful, so in theory it's safe to run untrusted code where no permissions have been granted.
There are some exceptions: for example code loaded from the system classpath is allowed to call System.exit(), which would stop your application, and code running with no permissions can still create any number of new threads, which could lock up the system. If these are concerns you'll need to consider writing a custom Security Manager.
code :
grant codeBase "file:path/to/trusted/application/jars" {
  permission java.security.AllPermission;

Share : facebook icon twitter icon
Java security policy file question

Java security policy file question

By : user3077930
Date : March 29 2020, 07:55 AM
seems to work fine Make sure you run the editor you use to edit the file (e.g. notepad) as Administrator -- otherwise the file permissions set on that directory will not allow you to modify the file. Right click on notepad, select "Run as administrator" then load the file in notepad, edit it and save it and that should work.
Can I guarantee that my Java application will be executed with a Security Manager with a restrictive policy?

Can I guarantee that my Java application will be executed with a Security Manager with a restrictive policy?

By : sspwin
Date : March 29 2020, 07:55 AM
Does that help Your analysis is correct, you cannot have such a guarantee.
Your program is executed by the Java virtual machine. Whatever property you want to require of the JVM, you have to ask it “does this property hold?”. So you'd be asking the JVM “do you protect my application against the people who are running you?”, and the people who are running that JVM can configure it to lie — just say “yes” even though the answer is no. At most you would require a minor patch to the JVM, and probably not even that as whoever wants to see your application run can just fire up a debugger.
Injecting iframe into page with restrictive Content Security Policy

Injecting iframe into page with restrictive Content Security Policy

By : Ömer Kala
Date : March 29 2020, 07:55 AM
like below fixes the issue
The inability to insert an external iframe in Chrome is a bug (crbug.com/408932).
code :
    "name": "Embed external site",
    "version": "1",
    "manifest_version": 2,
    "content_scripts": [{
        "js": ["contentscript.js"],
        "matches": ["*://*/*"],
        "all_frames": true
    "web_accessible_resources": [
// Avoid recursive frame insertion...
var extensionOrigin = 'chrome-extension://' + chrome.runtime.id;
if (!location.ancestorOrigins.contains(extensionOrigin)) {
    var iframe = document.createElement('iframe');
    // Must be declared at web_accessible_resources in manifest.json
    iframe.src = chrome.runtime.getURL('frame.html');

    // Some styles for a fancy sidebar
    iframe.style.cssText = 'position:fixed;top:0;left:0;display:block;' +
html, body, iframe, h2 {
    margin: 0;
    border: 0;
    padding: 0;
    display: block;
    width: 100vw;
    height: 100vh;
    background: white;
    color: black;
h2 {
    height: 50px;
    font-size: 20px;
iframe {
    height: calc(100vh - 50px);
<h2>Displaying https://robwu.nl in a frame</h2>
<iframe src="https://robwu.nl/"></iframe>
Make Angular working with restrictive Content Security Policy (CSP)

Make Angular working with restrictive Content Security Policy (CSP)

By : AL Hussainee
Date : March 29 2020, 07:55 AM
I wish did fix the issue. The problem has been solved using last Angular CLI version (starting with 1.0.0-beta.17). The following command serves a working application because it includes a-head-of-time compilation.
code :
ng serve --prod
set java security policy via parameter instead of file

set java security policy via parameter instead of file

By : Michael Ben Haym
Date : March 29 2020, 07:55 AM
wish help you to fix your issue There is no way to do that, you can only specify URL to another security policy file.
Related Posts Related Posts :
  • How to write generic Java API without method Overloading
  • Java Serialization / Deserialization of an ArrayList works only on first program execution
  • Conway's Game of Life's rules dont apply properly
  • call a java method when Click on a html button without using javascript
  • Why does SSLSocketFactory.createSocket returns a Socket instead of SSLSocket?
  • How to schedule a task in Tomcat
  • compare two pdf files (approach) using java
  • What is the use of allowCoreThreadTimeout( ) in ThreadPoolExecutor?
  • Describe the Strategy Design Pattern in Java?
  • MongoDB too many open connections
  • Issue with generate JAXB classes with value constructors
  • Moving from one frame to another in java swing
  • Get a thread by Id
  • how to open front camera and back camera at same time?
  • Messed up with Java Declaration
  • Extracting chart in EXcel as image using java
  • How to get latitude and longitude in Android phone?
  • Do GC pauses and kill -STOP produce the same behavior?
  • Android HTML.ImageGetter Images resized
  • The way to instantiate map<String, List<String>> in Java
  • Java Making objects move while buttons held
  • Androidx Navigation View - `setNavigationItemSelectedListener` Doesn't Work
  • after compiling code JFrame does not appear
  • Netbeans project, JFrames ran from the main JFrame close all JFrames in project
  • Square Retrofit Client: How to enable/disable followRedirects? How to intercept redirect URL?
  • Java Circular Reference - Can’t Compile
  • Mouse click on specific time JAVA
  • android 4 onCreateDialog return type incompatible when overriding
  • Java Implementation of Oracle's DBMS_UTILITY.GET_HASH_VALUE Function
  • javac cannot be run, and furthermore does not seem installed
  • Function to obtain a thread given its ID
  • Java File path to Executable has spaces
  • Minimum Oracle Java VM heap memory setting?
  • Elegant way to create one of a large number of classes
  • Java fx binding styles
  • Summing weights based on string in large file
  • Android ListView setOnItemClickListener not working
  • How is the Java Bootstrap Classloader loaded?
  • Check object is blank
  • Add image between text in JEditorPane
  • Java POI Excel creating new column and new rows
  • NullPointerException when managing bean with Spring+JSF(Primefaces)
  • Content autocomplete in spring tool suite 4
  • Super Noob Help ~ MouseEvent/Frame
  • Making one project with dependencies stand-alone in Eclipse (Java)
  • Jsoup- getting certain attributes from website
  • MongoDB, how to make a link between collections with JAVA code
  • Overriding an abstract method means class abstract class or not in java?
  • Bukkit teleport - nullPointerException
  • How to check if a Float variable is negative in java
  • Servlet: Cannot forward after response has been committed
  • sql query to select a specific cell in excel
  • How to make new picture when mouse dragged in java
  • Use Constants interface in GWT Project
  • Setting size of a JPanel in GroupLayout
  • Construct a map from two equal size arrays
  • Implementing Read-Write Locks with Double-Checked Locking
  • Disable NO_BUTTON from JOptionPane Java if a condition is true
  • UDP multiple socket
  • Android Threading: This Handler class should be static or leaks might occur
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org