目录 . 漏洞的起因 . 漏洞原理分析 . 漏洞的影响范围 . 漏洞的利用场景 . 漏洞的POC.测试方法 . 漏洞的修复Patch情况 . 如何避免此类漏洞继续出现 1. 漏洞的起因 为了理解这个漏洞,我们需要先理解两个基本概念 0x1: Bash的环境变量 . 只能在当前shell中使用的"局部变量" var="hello world" echo $var . 在子进程中也可以使用的"全局变量" export var="hello…

原文:EnvironmentVariables General Environment variables are named strings available to all applications. Variables are used to adapt each application's behavior to the environment it is running in. You might define paths for files, language options, an…

The trick is to add environment variables to sudoers file via sudo visudo command and add these lines: Defaults env_keep += "ftp_proxy http_proxy https_proxy no_proxy" from: http://stackoverflow.com/questions/8633461/how-to-keep-environment-vari…

https://msdn.microsoft.com/en-us/library/windows/desktop/ms682653(v=vs.85).aspx Every process has an environment block that contains a set of environment variables and their values. There are two types of environment variables: user environment varia…

learn how to pass environment variables to your node.js app using the pm2 config file. This is useful for setting options inside your app such as production or development. pm2.config.json: { "apps": [{ "name": "App1", "…

Request: List the environment variables from Command Promt To list one varibales , the syntax is like : echo %path% To list all variables in command prompt. you can use : set e.g: C:\Users\tcaiy\set you can also sent the output to a output file , whi…

We will incorporate npm specific environment variables when executing various npx commands. In our example, we will transpile code to a folder name that matches the version of the current package. "scripts": { "build": "babel inde…

How to set JAVA environment variables JAVA_HOME and PATH in Linux After installing new java (jdk or jre) or latest Java you may have usually find that the version of java is not exactly the same which you have installed. It might be showing you the s…

SQL Server Integration Services(SSIS) 在2012版本引入了Environment Variables这个新特性.它允许我们为一个环境创建出一套变量用于为项目内的包在执行时进行参数赋值,比如我们可以为PROD环境,SIT环境,UAT环境和DEV环境创建出不同的变量.这点对于像connection string这样的东西是很有用处的.看似是个不错的功能,其实仔细研究下来还是觉得有些失望. 首先第一点,既然常量/显示赋值(literal value)也是可以做到的…

转:http://blog.163.com/lgh_2002/blog/static/44017526201046111856208/ 问题1: svn: Could not use external editor to fetch log message; consider setting the $SVN_EDITOR environment variable or using the --message (-m) or --file (-F) options svn: None of th…