Reverse Engineering Flash- SWF : an overview...

-


Reverse Engineering Flash- SWF : an overview...

Reverse Engineering exes and linus applications is known.

However another interesting thing to learn is flash reversing. This can be used for action-script analysis or offensive hacking both!

Applying reverse engineering to browser components helps in catching vulnerabilities early in the  software development life cycle.

Reverse engineering can help in identifying resources bundled on the  browser side and one can dissect them to determine different security issues and concerns.

It contains reverse engineering the architecture of browser layer, fingerprinting components, discovery of cross  domain interactions, debugging calls, DOM inspection, decompiling components, inter-platform communication, socket calls inspection and vulnerability tracing

Static code analysis– It is simple to perform static analysis across code running in the browser.

JavaScript code is available in cleartext and it is possible to perform a review of the code to determine several HTML 5-related vulnerabilities along with DOM based issues.

It is also possible to do hybrid analysis to reduce the scope by capturing codebase at runtime (DOMTracer).

HTML and JavaScript can help in identifying Localstorage issues, WebSQL implementation, HTML tag abuses and other DOM-driven issues.


Object code analysis– Flash and Silverlight run on the browser stack as plug-ins.

It is possible to retrieve their object code which runs on their own sandbox or platform within the browser.

Both SWF (Flash/Flex) and XAP/DLL (Silverlight) have their object code that can be decompiled and analyzed.

It is also possible to reconstruct the code in human  understandable languages using decompilers like Lutz, SWFdump, Trilix etc.

This method can be applied to mobile  applications (Android/iPhone) as well to determine issues.

Reverse Engineering and Protocol analysis– the traditional way to discover and monitor  HTTP traffic going over SSL or non-SSL is by using a proxy.

It’s important to observer AMF, SOAP  and WCF traffic to discover server side vulnerabilities. 

Comments

Post a Comment

Popular posts from this blog

Arbitrary file upload and RCE in Wonder CMS - CVE-2017-14521

-
Image
By- Samrat Das Hi Readers Recently in one of my pentest research, I found a CMS " WonderCMS" hosted in github. Curious to explore its functionalities, I downloaded and set it up in my local system. After fiddling with the source code, I found that it did not have any kind of file upload security mechanism and allowed the user to upload any file type! After reporting it to them, I did not receive any security relevant response, hence decided to publish a blog on this. Title of the Vulnerability:   Arbitrary File Upload Vulnerability Class: Security Misconfiguration Technical Details & Description: The application source code is coded in a way which allows arbitrary file extensions to be uploaded. This leads to uploading of remote shells/ malicious Trojans which can lead to complete system compromise and server takeover. CVE ID allocated :  CVE-2017-14521 Product & Service Introduction: Wonder CMS 2.3.1 WonderCMS is an open source CMS (Content Ma
Read more

Cross Site Request Forgery- Intex Router N-150 | CVE-2018-12529

-
Image
By- Navina Asrani Hi Readers, Recently while tinkering with my wifi router, I was curious to find if it has possible loopholes and vulnerabilities. Curious to explore its functionalities, I started probing with the options. Title of the Vulnerability:   Cross Site Request Forgery Vulnerability Class: Code Execution/ Privilege Escalation Technical Details & Description: The firmware allows malicious request to be executed without verifying source of request. This leads to arbitrary execution with malicious request which will lead to the creation of a privileged user. CVE ID allocated: -  CVE-2018-12529 Product & Service Introduction: Intex Router Steps to Re-Produce – 1.        Visit the application 2.         Go to any router setting modification page and change the values, create a request and observe the lack of CSRF tokens. 3.        Craft an html page with all the details for the built-in admin user creation and host it on a server
Read more

Stored XSS in Wonder CMS- CVE-2017-14522

-
Image
By- Samrat Das Hi Readers Recently in one of my pentest research, I found a CMS " WonderCMS" hosted in github. Curious to explore its functionalities, I downloaded and set it up in my local system. After fiddling with the source code, I found that it did not have any kind of security mechanism to filter any user input and accepted and stored in blindly without any sort of input validation Title of the Vulnerability:   Stored XSS Common Vulnerability Scoring System:  7.0 Vulnerability Class:  Injection Technical Details & Description:  The application source code is coded in a way which allows user input values to be stored and processed by the application. CVE ID allocated :  CVE-2017-14522 Product & Service Introduction:  Wonder CMS 2.3.1 WonderCMS is an open source CMS (Content Management System) built with PHP, jQuery, HTML and CSS (Bootstrap responsive). WonderCMS doesn't require any configuration and can be simply unzipped a
Read more