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What is difference between local file inclusion and remote file inclusion?
Remote File Inclusion (RFI) is a type of vulnerability most often found on PHP running websites. Local File Inclusion (LFI) is very much like RFI; the only difference is that in LFI the attacker has to upload the malicious script to the target server to be executed locally.
What is XML external entities vulnerability?
XML external entity injection (also known as XXE) is a web security vulnerability that allows an attacker to interfere with an application’s processing of XML data.
What is an XML eXternal Entity ( XXE ) attack?
XXE or XML External Entity attack is a web application vulnerability that affects a website which parses unsafe XML that is driven by the user. XXE attack when performed successfully can disclose local files in the file system of the website. XXE is targeted to access these sensitive local files of the website that is vulnerable to unsafe parsing.
Where does an XML eXternal Entity come from?
In fact, XML entities can come from just about anywhere – including external sources (hence the name XML External Entity). This is where XXE becomes a type of a Server Side Request Forgery (SSRF) attack. An attacker can create make the following request using a URI (known in XML as the system identifier ).
What kind of attack does an XML parser use?
An XML External Entity (XXE) attack (sometimes called an XXE injection attack) is a type of attack that abuses a widely available but rarely used feature of XML parsers. Using XXE, an attacker is able to cause Denial of Service (DoS) as well as access local and remote content and services.
How are XML vulnerabilities a target for attackers?
This means that the application tried to process XML external entities and therefore it is vulnerable. Once you have discovered the vulnerability, you can forge and provide malicious XML input. The first attack scenario is to attempt to extract data from the server. Let’s read /etc/passwd from server by pre-pending a definition of xxe entity: