Node Js Php Serializer: A JavaScript equivalent to PHP's serialize function[^3^]

Untrusted data passed into unserialize() function in node-serialize module can be exploited to achieve arbitrary code execution by passing a serialized JavaScript Object with an Immediately invoked function expression (IIFE).

During a Node.js code review, I happen to see a serialization/deserialization module named node-serialize. A cookie value that comes from the request was passed into the unserialize() function provided by the module. Here is a sample node.js application to imitate the code:

Node Js Php Serializer

Download

I have used node-serialize version 0.0.4 for this research. For successful exploitation, arbitrary code execution should occur when untrusted input is passed into unserialize() function. The best way to create a payload is to use the serialize() function of the same module.

The vulnerability in the web application is that it reads a cookie named profile from the HTTP request, perform base64 decode of the cookie value and pass it to unserialize()function. As cookie is an untrusted input, an attacker can craft malicious cookie value to exploit this vulnerability.I used nodejsshell.py for generating a reverse shell payload.

Great!!i did like that and it works perfectly.but i read in some article if we have server crash we lost all sessions and users must re login again in this method :(.now is there any cookie way or something like to keep users logged in if our server crashes?after that i thought about storing sessions in mysql and read session_ids from node to keep user logged_in if server crashed.but i need a session save handler which store session data in database in json format

In this case, i may recommand you that one : quite the same code, but using Redis (a better idea for that) instead of memcache. They got both same command-like interface : -and-node-js-session-share-redi/

While you can create your own implementation on top of the node:async_hooksmodule, AsyncLocalStorage should be preferred as it is a performant and memorysafe implementation that involves significant optimizations that are non-obviousto implement.

One major problem with creating UI components with the MooTools JavaScript framework is that there isn't a great way of allowing customization of template and ease of node creation. As of today, there are two ways of creating:new Element MadnessThe first way to create UI-driven...

In the past different users have tried to enrich the JMS serializer ability to validate objects,but mixing the deserialization, validation and normalization is a risky idea.Is risky because can end up with a library not able to do well none of the three.Currently there are great alternatives when talking about validation or normalization.

The data types DateType and TextType (and many others built in into symfony) have plenty of useful optionsand configurations that allows you to customize the de-serialization process. The form component can also set to NULLall the fields before starting the "conversion" process or can do just simple update to your object state(something that is not possible with the JMS serializer).

With this post I'm not saying "stop using the JMS Serializer" for deserialization, what I'm saying is"use the jms de-serializer in specific situations" where the validation and normalization are not fundamental.

My personal use-case for the JMS de-serializer is to exchange data between "Queue-workers".Data are produced by a php application (using the JMS serializer) and consumed by various PHP workers(data deserialized using the JMS de-serializer).In my case the data are really simple and produced by reliable sources.Because of that validation and normalization and validation are almost not necessary.(Some post-normalization validation is performed at application level to ensure the data received are valid, but not much)

My personal NOT-use-case for the JMS de-serializer is the handling of POST/PUT/PATCH requests in a REST webservice.The data that a public REST webservice should handle are often complex, especially if it is part of an API consumedby some user-facing frontend application.The API has to validate and normalize the user input as emails, date of birth, bank transaction amounts and so on...

This tiny script act as both a serializer and deserializer for three different classes, that for sake of simplicity are named in a very intuitive way, respecting the standard format of other examples provided so far.

The first NodeJS module under analysis is node-serialize. In 2017, a researcher named Ajin Abraham found that this module allowed deserialization of function objects in a non-safe way, leading to RCE.

If tested, it is possible to see that node-serialize serializes objects using regular JSON format. The question that may arise would be, why not JSON.stringify(), then? The reason being that JSON cannot really serialize functions.

The problem arises, of course, during the deserialization process, because to reverse the function back, node-serialize would pass any object prefixed with _$$ND_FUNC$$_ to eval, as can be seen from the following snippet:

As for other languages, it would be handy to have a tool to automatically generate suitable payloads. In order to do that, the following script was created, named desert-node. The tool can be used to generate different payloads for the libraries prensented in this article. An updated version of the tool can also be downloaded here.

The check is only done if the AbstractObjectNormalizer::ENABLE_MAX_DEPTH key of the serializer contextis set to true. In the following example, the third level is not serializedbecause it is deeper than the configured maximum depth of 2:

If the class constructor defines arguments, as usually happens withValue Objects, the serializer won't be able to create the object if somearguments are missing. In those cases, use the default_constructor_argumentscontext option:

When a PropertyTypeExtractor is available, the normalizer will also check that the data to denormalizematches the type of the property (even for primitive types). For instance, if a string is provided, butthe type of the property is int, an UnexpectedValueExceptionwill be thrown. The type enforcement of the properties can be disabled by settingthe serializer context option ObjectNormalizer::DISABLE_TYPE_ENFORCEMENTto true.

A popular alternative to the Symfony Serializer component is the third-partylibrary, JMS serializer (versions before v1.12.0 were released underthe Apache license, so incompatible with GPLv2 projects).

It is not uncommon to need or desire to work in different versions of nodejs. A preferred method among node users is to use NVM (Node Version Manager). nvmAUR allows for cheap and easy alternative installs.

node.js javascript twilio jquery This tutorial walks you through building an MMS-powered slideshow in Node. Make a great app for any photo-sharing occasion and learn to use Twilio webhooks at the same time.

In 2022, the @sanity/block-content-to-react package was deprecated in favour of @portabletext/react. The example above uses components and values from the new package instead of serializers and blocks, but we offer a migration guide and will continue to answer questions about @sanity/block-content-to-react in the Slack community.

If you need to convert existing markup to Portable Text you can use the JavaScript library Sanity Block Tools. You can use it both in a browser and in a node.js environment. It also lets you make custom rules to deserialize parts of your HTML into custom content types etc.

Many of the issues with in-process caches can be solved by employing a distributed caching solution that offers a single view into the cache, even if it is deployed on a cluster of multiple nodes. This means that cached objects are written to and read from the same place, regardless of the number of servers employed, reducing the occurrence of cache coherence issues. A distributed cache also remains populated during deployments since it is independent of the application itself and uses its own storage space so that you are not limited to the available server memory.

In-process caching may be implemented in a Node.js application through libraries, such as node-cache, memory-cache, api-cache, and others. There is a wide variety of distributed caching solutions, but the most popular ones are Redis and Memcached. They are both in-memory key-value stores and optimal for read-heavy workloads or compute-intensive workloads due to their use of memory rather than the slower on-disk storage mechanisms found in traditional database systems.

Below is an example that demonstrates how effective in-process caching can be performed without requiring a convoluted setup process. This simple NodeJS application utilizes node-cache and the cache-aside pattern discussed earlier in this post to speed up subsequent requests for a list of posts from an external API.

Redis is pretty much the go-to distributed caching solution for not only Node.js but also other languages. This example showcases how a cache layer may be added to a Node.js application using Redis. Similar to the previous example using node-cache, the data to be cached will be retrieved from an API.

Ensure that you have Redis installed before trying out the sample code below. You may follow the official quickstart guide to learn how to get it up and running. Furthermore, make sure to install the necessary dependencies before running the program. This example utilizes the node-redis library.

This is a node.js driver (Asynchronous, non-blocking SQLite3 bindings) for sqlite3. It is written in JavaScript, does not require compiling. It provides all most all connection/query from SQLit3. This is probably one of the best modules used for working with SQLite3 database and the module is actively maintained.

Writing asynchronous functions using the thread pool unfortunately also removes all stack trace information, making debugging very hard since you only see the error message, not which statement caused it. To mitigate this problem, node-sqlite3 has a verbose mode which captures stack traces when enqueuing queries. To enable this mode, call the sqlite3.verbose(), or call it directly when requiring: var sqlite3 = require('sqlite3').verbose(). 2ff7e9595c