Protection against log4j websocket attacks by disabling websockets to localhost and private IPs.

Latest Version

Version
1.0.0
Update
December 22, 2021
Size
62.68KiB
Developer
meetpaladin.com
Category
Users
227
Rating
1 ★
Manifest Version
2
Web Store Status
Languages Support
English
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Permissions

WebRequest
WebRequestBlocking
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Paladin Log4j Immunizer Extension

Browser extension to prevent Log4J exploits via WebSocket against services running on private network and localhost. This extension will disable connections over WebSocket to localhost and private IP addresses unless the initiator is also localhost or a private IP. This should harden your browser against drive-by websites, phishing landing pages, malicious HTML attachments and malicious ads that seek to use your browser as a beachhead for launching Log4J exploits against your company's internal web applications.

License: GPLv3
Source: https://github.com/paladincyber/log4jprotector
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "name": "Paladin Log4j Immunizer", "description": "Protection against log4j websocket attacks by disabling websockets to localhost and private IPs.", "version": "1.0.0", "manifest_version": 2, "author": "Paladin Cyber", "background": { "scripts": ["build/tsc/bundle.js"] }, "permissions": [ "\\u003Call_urls>", "webRequest", "webRequestBlocking" ], "browser_action": { "default_icon": { "16": "images/logo16.png", "32": "images/logo32.png", "48": "images/logo48.png", "128": "images/logo128.png" }, "default_title": "Stopping websocket connections against localhost and private IPs." }, "icons": { "16": "images/browser-signedin16.png", "32": "images/browser-signedin32.png", "48": "images/browser-signedin48.png", "128": "images/browser-signedin128.png" }}
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How to download and manually install Paladin Log4j Immunizer extension for Chrome

Looking for a way to install Paladin Log4j Immunizer extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install Paladin Log4j Immunizer extensions manually, this article outlines two simple methods to effortlessly install Paladin Log4j Immunizer extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download Paladin Log4j Immunizer extension and manually install through Drag &Drop

If you ever need to manually install a Paladin Log4j Immunizer extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the Paladin Log4j Immunizer Extension by clicking the "Download CRX" button on the website.

Look for the Paladin Log4j Immunizer extension you wish to install. Go to the website and download the Paladin Log4j Immunizer extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Paladin Log4j Immunizer extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the Paladin Log4j Immunizer extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download Paladin Log4j Immunizer extension for Chrome and install in Developer Mode

This is another method to install Paladin Log4j Immunizer extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the Paladin Log4j Immunizer extension file

Select and download the Paladin Log4j Immunizer extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the Paladin Log4j Immunizer extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your Paladin Log4j Immunizer extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the Paladin Log4j Immunizer extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install Paladin Log4j Immunizer extension in 2 ways. We hope this guide proves helpful.

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