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How to reproduce the RCE vulnerability of unauthorized access to the XXL-JOB API interface

How to reproduce the RCE vulnerability of unauthorized access to the XXL-JOB API interface

XXL-JOB Description XXL-JOB is a lightweight distributed task scheduling platform. Its core design goals are rapid development, easy learning, lightweight, and easy expansion. The source code is now open and connected to the online product lines of many companies, ready to use out of the box. 1. Vulnerability details The core issue of this vulnerability is GLUE mode. XXL-JOB supports multi-language and script tasks through "GLUE mode". The task features of this mode are as follows: ●Multi-language support: supports Java, Shell, Python, NodeJS, PHP, PowerShell... and other types. ●WebIDE: Tasks are maintained in the dispatch center in source code mode and support online development and maintenance through WebIDE. ●Dynamic effective: user online communication

May 12, 2023 am 09:37 AM
API XXL job
How to perform security configuration to turn off detailed content display on iis error page

How to perform security configuration to turn off detailed content display on iis error page

For web security, prevent *** from obtaining useful information through web error page information, turn off the iis error page to display detailed content 1. Open the iis function view, open the error page, click Edit function, set the default to detailed error, select custom error

May 12, 2023 am 09:28 AM
iis
How to analyze double check locking in JAVA language

How to analyze double check locking in JAVA language

1. Double-check locking In program development, sometimes it is necessary to postpone some high-cost object initialization operations and only initialize them when these objects are used. In this case, double-check locking can be used to delay object initialization operations. Double-check locking is a software design pattern designed to reduce competition and synchronization overhead in concurrent systems. Based on the ordinary singleton pattern, it first determines whether the object has been initialized, and then decides whether to lock it. Although double-checked locking solves the error-prone and thread-unsafe problems of ordinary singleton patterns in multi-threaded environments, there are still some hidden dangers. The following takes the JAVA language source code as an example to analyze the causes and repair methods of double-check locking defects. 2. The dangers of double-check locking Double-check locking is

May 12, 2023 am 08:55 AM
Java
How to conduct web penetration skills analysis

How to conduct web penetration skills analysis

Currently, with the continuous development of information networks, people's awareness of information security is increasing day by day, and the security protection measures of information systems are also gradually improved. Firewalls are usually deployed at the Internet boundary of the server to isolate internal and external networks, and only the server ports required by the outside are exposed. Adopting this measure can greatly improve the security level of the information system. For external attackers, it is like closing all irrelevant channels, leaving only a necessary entrance. But in this state, there is still a type of security problem that cannot be avoided, and that is web vulnerabilities. The reason is that the user's input characters are not strictly filtered when the program is written, allowing hackers to carefully construct a malicious string to achieve their own goals. So, how can we find out whether there are such security issues?

May 12, 2023 am 08:34 AM
web
How to analyze APP testing and process

How to analyze APP testing and process

In my current work, testing App will involve the following aspects: client, applet, h6 page, etc., which may seem different but are quite different. Click to add a picture description (up to 60 words) 1. Function module test: The most important thing about function module test is to examine the tester’s logical thinking ability and understanding of requirements, as well as some page interactivity, input and output considerations, etc., so The above three are common and there is not much difference. 2. Permission management: 1) Similarities: It is necessary to consider the situations where permissions are allowed and the situations where permissions are not allowed; it is necessary to test more pages without system permissions 2) Differences: When testing the App, it is necessary to consider whether the user can access mobile communications, photo albums, Camera, storage space and other permissions, what will happen when the permissions are turned off. Is the mini program

May 12, 2023 am 08:07 AM
App
What are the 6 common reasons why apps crash?

What are the 6 common reasons why apps crash?

People hate app crashes, especially if they slow down or freeze for a few seconds. According to a survey by DimensionalResearch, 61% of users expect programs to launch within 4 seconds, and 49% expect input to respond within 2 seconds. If the app crashes, freezes or reports an error, 53% of users will uninstall the app. Whether your target is consumers or businesses, crash issues can turn them off completely. I spoke to some mobile developers and asked them what the most common crash issues they encountered were, and they came up with six common causes: 1. Memory Management Everyone I asked talked about memory management, Most apps will start many threads to occupy the system's memory. OpsC

May 11, 2023 pm 11:25 PM
App
Explanation of how to perform sql injection code

Explanation of how to perform sql injection code

The SQL query code for login verification of a certain website is: 1

May 11, 2023 pm 11:19 PM
6666
How ATS implements caching strategies to increase dynamic service throughput

How ATS implements caching strategies to increase dynamic service throughput

First, let’s take a look at the traffic diagram immediately after the policy adjustment: In order to improve the user experience, increase the cache amplification ratio, and avoid customer reports, we have taken great pains when doing the cache, separating large files from small files, and in small files. By separating dynamic content and static content, basically everything that can be stored has been saved. Only dynamic content has not been started. According to the previous strategy, dynamic content is directly proxied, with 1:1 entry and exit, but some bureaus just won’t stop. , if you have to reach a certain magnification ratio, if there is no folding, just use the knife in the dynamic content. Before going under the knife, I did an analysis first and did a lot of testing on the dynamic content that could be stored and the ATS caching strategy, which benefited a lot. The current caching strategy of ATS fully complies with the http protocol and adopts the most conservative caching method.

May 11, 2023 pm 11:16 PM
ats
What is the workflow of website development?

What is the workflow of website development?

The first step is to conduct needs analysis. When a customer asks what kind of website they want to build, we must understand the customer's needs and conduct a needs analysis. Some people may ask: demand analysis, what is analyzed? For example: What type of website does the customer want to build? What is the style like? Are there any specific requirements? and server space requirements. The second step is to redefine the needs analysis of the website sketch, and plan the content section sketch of the website based on the user needs analysis. Commonly known as: website sketch. The third step is the art design stage, and then based on the website sketch, the artist will make a rendering. Just like building a house, you first draw the renderings and then start building the house. The same is true for the website. Step 4: In the program development stage, according to the page structure and design, the front-end and back-end can be developed at the same time.

May 11, 2023 pm 11:16 PM
网站开发
Example analysis of TCP three-way handshake to establish a link and four-way wave to break the link

Example analysis of TCP three-way handshake to establish a link and four-way wave to break the link

One step at a time. First, let’s briefly introduce the TCP protocol. TCP (TransmissionControlProtocol) is a connection-oriented, reliable, byte stream-based transport layer protocol. It's complicated, but it's a basic skill that both programmers and operation and maintenance personnel must know. Object-oriented - The two parties need to establish a connection in advance before communicating. This is like making a phone call in real life. The phone must be dialed before communication can occur. Reliable - There are many rules in the TCP protocol to ensure the reliability of communication links, including application data separation, retransmission mechanism, header and data verification, sorting of received data, and then handing it over to the application layer, The receiving end will discard duplicate data and can perform flow control.

May 11, 2023 pm 10:34 PM
TCP
What are JavaScript single threads and task queues?

What are JavaScript single threads and task queues?

1. Why is JavaScript designed to be single-threaded? A major feature of the JavaScript language is that it is single-threaded. In other words, it can only do one thing at a time. for(varj=0;j

May 11, 2023 pm 10:31 PM
JavaScript
How to perform static analysis in Android

How to perform static analysis in Android

Android reverse engineering is the process of decompilation. Because the results of Android forward compilation cannot be understood, the premise of static analysis in CTF is to decompile the appearing files to a layer of source code that we can understand and perform static analysis. 0X01 Basic description: The logic code of the Android application is developed by Java, so the first layer is the Java code. The Java virtual machine JVM runs the class file compiled by the Java file. The Android virtual machine Dalvik is not generated after executing the Java virtual machine JVM compilation. class file, but execute and re-integrate the dex file generated after packaging. The smali file APK after compilation: is the Andro after compilation.

May 11, 2023 pm 10:28 PM
Android
How to use PowerView script

How to use PowerView script

Traditional internal reconnaissance testing uses built-in Windows commands such as netview, netuser, etc. to obtain host and domain information. Because the blue team can monitor these commands and trigger alerts. So use other methods, such as PowerShell and WMI, to avoid detection during environment exploration. PowerViewPowerView is a PowerShell script developed by WillSchroeder and is part of the PowerSploit framework and Empire. The script relies only on PowerShell and WMI (Windows Management Tools) for querying. PowerVie from an existing meterpreter session

May 11, 2023 pm 09:49 PM
PowerView
What are the basic knowledge points of computer network

What are the basic knowledge points of computer network

Ⅰ. Division of network levels In order to establish computer networks on a larger scale, the International Organization for Standardization (ISO) proposed the "Open System Internet Reference Model" in 1978, which is the famous OSI (Open System Interconnection) model. In addition to the standard OSI seven-layer model, the common network layer divisions include the TCP/IP four-layer protocol. The corresponding relationship between them is as follows: Ⅱ. OSI seven-layer network model, whether it is the OSI seven-layer model or TCP/IP In the four-layer model, each layer must have its own exclusive protocol to complete its own corresponding work and communicate between the upper and lower layers. Let’s start with the detailed description of OSI’s seven-layer model: (1) Physical layer The physical layer is the most basic network structure.

May 11, 2023 pm 09:49 PM
计算机网络

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