yahoo-spoof

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Yahoo Axis Forged Package

Yahoo! accidentally included their private certificate file inside the Axis Chrome extension

This project is a test package signed using the certificate. Source is in src a test build signed with the cert is in build.

The original package is in original_build and the unpacked original source is in original_src

The spoofed package has the exact same source except it adds a content script.

Install

To test install the package click on the raw link:

https://github.com/nikcub/yahoo-spoof/raw/master/build/yahoo-spoof.crx

All that it does is trigger a javascript alert on every page load on every site/domain. It does this via an added content script.

Contents

In this repo

• src - the source for the forged package with added content script
• build - a build of the forged package with added content script
• original_src - original Yahoo! source for Axis
• original_build - the original package from Yahoo!

Implications

Working that out now. I think that if you can DNS hijack the update URL a forged package would update and install silently.

Updates

I have published a blog post about this issue. Updates and responses will be posted there.

Follow latest on my Twitter at @nikcub