Node.js Apps to be Vulnerable to Redo Attack

Researchers found 25 previously unknown vulnerabilities in popular Node.js modules
21 August 2018   898

Researchers from the Darmstadt Technical University (Germany) discovered 25 new vulnerabilities in the Node.js. They open web servers and applications for ReDos attacks, leading to denial of service for a few seconds to a minute. This is reported by Bleeping Computer.

At the moment, there are 340 websites that contain at least one of the vulnerabilities.

ReDoS-attacks (Regular Expression Denial of Service) use the shortcomings of code performance when working with regular expressions. An attacker can upload a large and complex piece of text to the server or into the application as input. If the service components are not specifically designed to handle such a variety of data types, it will completely freeze the resource or application for the time it will take to deal with the input array.

Sending few packages will lead to a longer "freezing" of the server.

For such an attack, many programming languages ​​and web services are vulnerable. In the case of JavaScript, the consequences are worse because the language uses a single-threaded execution model, when each request is processed in turn. As a result, ReDoS-attack does not slow down any specific operation, but blocks the entire server.

It has became known about ReDoS-attacks in 2012, but at the time JavaScript, and specifically - Node.js, wasn't widely used in web development, so for more than five years the problem was ignored.

The researchers gave a list of modules in which at least one of the previously unknown vulnerabilities was detected:

Vulnerable modules
Vulnerable modules

They reported the issues to the developers of npm-modules and laid out on the GitHub a proof-of-concept exploit for each of them. Researchers also have created a tool with which it is possible to identify vulnerable sites without conducting a full-fledged attack. Thus, 339 resources were found - 12% of all that are based on Node.js.

Microsoft to Use Chromium for Edge Browser

The company has already placed the repository on GitHub to attract new members to the development of the browser
07 December 2018   144

Microsoft Vice President Joe Belfiore said that from December 6, 2018, the company will use the Chromium engine in the Microsoft Edge browser. According to him, Microsoft also plans to develop browsers for smartphones and other devices.

The company has already placed the repository on GitHub to attract new members to the development of the browser. Microsoft expects that the transition to the new engine will be a big step in the development of Microsoft Edge. For example, the browser will finally be adapted for macOS.

According to Belfiore, the company plans to improve the project in three areas:

  • Users will get hardware integration, improved browser compatibility with sites and reduced power consumption of devices when using it.
  • Web developers will appreciate the reduced fragmentation of a web platform for testing sites.
  • The corporate IT sector will get the compatibility of old and new Windows applications that run in the browser.

He noted that during the year the company would work “under the hood” of Microsoft Edge, and named several key stages of this process. For example, the transition to a platform compatible with the Chromium engine for developing a desktop version of the browser. It is also planned that most platforms and all versions of Windows will support Microsoft Edge.