WebViews

5 Jun 2014

Continued Adventures with iOS UIWebViews

This article explores security vulnerabilities in iOS UIWebViews, specifically focusing on custom NSURLProtocol implementations. The research demonstrates how attackers can bypass naive security checks by manipulating HTTP headers and using techniques like XMLHttpRequest to access restricted resources. A proof-of-concept JavaScript payload is presented to illustrate potential exploitation methods for file access and data exfiltration.

20 Dec 2013

Google AdMob Ad Library - Arbitrary Intent Activity Invocation

A vulnerability was discovered in the Google AdMob SDK for Android that allows attackers to manipulate Intent Activities by injecting JavaScript into a WebView. The vulnerability enables arbitrary activity invocation by controlling multiple parameters passed to the 'startActivity' method. Potential remote exploitation can occur by targeting exposed activities in other Android applications.

20 Dec 2013

PontiFlex Ad Library - Remote JavaScript Command Execution

A critical vulnerability was discovered in the PontiFlex ad library for Android that enables remote JavaScript command execution. The flaw allows attackers to download and execute arbitrary code, perform directory traversal, and potentially steal files from mobile applications through manipulated WebView JavaScript interfaces. The vulnerability impacts Android apps using the PontiFlex ad library, potentially exposing millions of users to remote code execution risks.

27 Nov 2013

Millenial Media Ad Library

A critical vulnerability was discovered in the Millenial Media SDK across mobile platforms. The SDK's WebView implementation allows attackers to perform dangerous actions like file manipulation, clipboard access, audio recording, and cross-application exploitation through malicious JavaScript injection. These security flaws could enable comprehensive mobile device compromise and unauthorized access to sensitive user information.

20 Nov 2013

AppLovin Ad Library SDK: Remote Command Execution via Update Mechanism

A critical vulnerability was discovered in the AppLovin Ad Library SDK for Android that enables remote command execution through an insecure update mechanism. The vulnerability allows attackers to inject malicious code into applications by exploiting the SDK's dynamic class loading process during updates. An attacker can craft a malicious SDK update that gets automatically downloaded and executed when an application starts.

24 Sep 2013

WebView addJavascriptInterface Remote Code Execution

A critical remote code execution vulnerability was discovered in Android WebViews using JavaScript interfaces. The vulnerability allows attackers to execute arbitrary system commands by injecting malicious JavaScript into applications using advertising network SDKs. Analysis revealed that a significant number of Android applications could potentially be compromised through this security flaw.

23 Apr 2012

Adventures with Android WebViews

This article provides guidance on securing Android WebViews by implementing best practices for mobile application security. Key recommendations include disabling JavaScript and plugins, restricting file system access, and implementing resource inspection techniques to prevent potential vulnerabilities. The article details methods for intercepting and controlling resource loading within WebViews to enhance mobile application security.

16 Apr 2012

Adventures with iOS UIWebviews

This article explores security challenges with iOS UIWebviews, focusing on techniques to mitigate risks when loading remote content. It discusses methods for implementing secure WebView interactions, including using SSL/TLS, implementing URL request inspection, and carefully managing content loading to prevent unauthorized access to local resources.