WEB SERVICES TESTING

1. WS Information Gathering
The first step to perform a Web Service Test is to determine the WS entry points and the communication schema: this is
described in the WSDL associated with the WS.

2. Testing WSDL
Check the WSDL of the web service to find the entry points and try to invoke an operation that is not used in a standard SOAP Request. Ensure that the WS doesn’t give some confidential information

3. XML Structural Testing
This section discusses the types of attack vectors one could send to a web service in an attempt to assess its reaction to malformed or maliciously-crafted messages. For example, elements which contain large numbers of attributes can cause problems with parsers. This category of attack also includes XML documents which are not well-formed XML (e.g., with overlapping elements, or with open tags that have no matching close tags). DOM-based parsing can be vulnerable to DoS due to the fact that the complete message is loaded into memory (as opposed to SAX parsing). For example, oversized attachments can cause an issue with DOM architectures.

4. XML Content-level Testing
Content-level attacks target the server hosting a web service and any applications that are utilized by the service, including web servers, databases, application servers, operating systems, etc. Content-level attack vectors include
  1) SQL Injection or XPath injection
  2) Buffer Overflow and  
  3) Command Injection.

5. HTTP GET parameters/REST Testing
Many XML applications are invoked by passing them parameters using HTTP GET queries. These are sometimes known as
“REST-style" Web Services (REST = Representational State Transfer). These Web Services can be attacked by passing
malicious content on the HTTP GET string (e.g. extra long parameters (2048 chars), SQL statements/injection (or OS
Injection parameters).

6. Naughty SOAP attachments
This section describes attack vectors for Web Services that accept attachments. The danger exists in the processing of the attachment on the server and redistribution of the file to clients.

7. Replay Testing
This section describes testing replay vulnerabilities of a web service. The threat for a replay attack is that the attacker can assume the identity of a valid user and commit some nefarious act without detection

Comments

Post a Comment

Popular posts from this blog

Grabbing Proxy With Selenium and Python

Image
Selenium is automated browser that can be controlled by script. Selenium support for many programming language like Java, csharp, python, ruby, php, perl, and javascript. This simple script for grabbing proxy list from freeproxylist.net website created with python. 1. Install python selenium        # apt-get install python-pip        # pip install selenium 2. Download browser driver     Chrome : https://sites.google.com/a/chromium.org/chromedriver/downloads Edge : https://developer.microsoft.com/en-us/microsoft-edge/tools/webdriver/ Firefox : https://github.com/mozilla/geckodriver/releases Safari : https://webkit.org/blog/6900/webdriver-support-in-safari-10/ Chose favorite browser you want. 3.  Run this script import os from selenium import webdriver from bs4 import BeautifulSoup from selenium.webdriver.common.keys import Keys chromedriver = "./chromedriver" # replace with your browser driver os.environ["w...
Read more

Authorization Testing

Image
1. Testing for Path Traversal First, we test if it is possible to find a way to execute a path traversal attack and access reserved information About input vector: 2. Testing for bypassing authorization schema This kind of test focuses on verifying how the authorization schema has been implemented for each role/privilege to get access to reserved functions/resources. 3. Testing for Privilege Escalation During this phase, the tester should verify that it is not possible for a user to modify his or her privileges/roles inside the application in ways that could allow privilege escalation attacks.
Read more

Bypass HTML Field Restrictions

This time I learn about Bypass HTML Field Restrictions. I bypass the html form . In order to pass this lesson , I must submit the form with each field containing the value of unallowed . I have to submit an invalid value for all six fields in one delivery form provided . that is : select field which has two choices , radio button which has two choices , input field which retricted to 5 character, and disableinput field with a form that can not be filled . And this some way that I have tried to bypass it : First I submibt that form as usual and I did not find any change Then I tried to intercept request by webscarab, I change values that not provided there. but I not find any changes too. I studied again after it there are only 5 fields in the request when the procedure mentioned there are 6 fields . then I add a new field that is itself disableinput field , the parameter I get from the source web page . but I not find ...
Read more