To mitigate DCVs, we design a multi-level solution that enhances the security of WebView.
Many high-profile apps are verified to be impacted, such as Facebook, Instagram, Facebook Messenger, Google News, Skype, Uber, Yelp, and U.S. In the world of web development, iframes are a secure method of embedding content from other sites onto your own page. More commonly, SAMEORIGIN is used, as it does enable the use of frames, but limits them to the current domain.
The DENY option is the most secure, preventing any use of the current page in a frame. If you found this extension useful, please consider supporting it: /iframeallow/ Currently, big sites like Google and Facebook don't allow their site to be displayed in iframes for security reasons. X-Frame-Options allows content publishers to prevent their own content from being used in an invisible frame by attackers. This also applies to Salesforce and Zendesk integrations. iFrame Allow lets all websites be displayed in iframes. By applying DCV-Hunter on a large number of most popular apps, we find DCVs are prevalent. We are updating our Content Security Policy (CSP) to be restricted to Twilio registered URLs.
#Iframe security android#
For this purpose, we develop a novel technique, DCV-Hunter, that can automatically vet Android apps against DCVs. Then, we study and assess the security impacts of DCVs on real-world apps. The bank transfer page is displayed in an invisible iframe above the free gift page, with the Confirm Transfer button exactly. We show an untrusted web iframe/popup inside WebView becomes dangerous that it can launch these attacks to open holes on existing defense solutions, and obtain risky privileges and abilities, such as breaking web messaging integrity, stealthily accessing sensitive mobile functionalities, and performing phishing attacks. To demonstrate the security implications of DCVs, we devise several novel concrete attacks. In this paper, we present a novel class of Android WebView vulnerabilities (called Differential Context Vulnerabilities or DCVs) associated with web iframe/popup behaviors.
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