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yahoo-spoof

★ 40 Open GitHub ↗

A forged Yahoo Axis chrome extension

// repository documentation

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## Yahoo Axis Forged Package

Yahoo! accidentally included their private certificate file inside the [Axis](http://axis.yahoo.com) Chrome extension

[![screenshot](https://img.skitch.com/20120524-xnwqgtrsq6g5f7tupwb8i3myq.jpg)](https://img.skitch.com/20120524-xnwqgtrsq6g5f7tupwb8i3myq.jpg)

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

All that [it does](https://github.com/nikcub/yahoo-spoof/blob/master/src/content.js#L2) 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](https://github.com/nikcub/yahoo-spoof/tree/master/src)
 * `build` - [a build of the forged package with added content script](https://github.com/nikcub/yahoo-spoof/tree/master/build)
 * `original_src` - [original Yahoo! source for Axis](https://github.com/nikcub/yahoo-spoof/tree/master/original_src)
 * `original_build` - [the original package from Yahoo!](https://github.com/nikcub/yahoo-spoof/tree/master/original_build)
 
## 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](http://nikcub.appspot.com/posts/yahoo-axis-chrome-extension-leaks-private-certificate-file) about this issue. Updates and responses will be posted there.

Follow latest on my Twitter at [@nikcub](http://twitter.com/nikcub)

yahoo-spoof

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