iOS SSL Kill Switch
Blackbox tool to disable SSL certificate validation – including certificate pinning – within iOS Apps.
Once installed on a jailbroken device, iOS SSL Kill Switch patches low-level SSL functions within the Secure Transport API, including SSLSetSessionOption() and SSLHandshake() in order to override and disable the system’s default certificate validation as well as any kind of custom certificate validation (such as certificate pinning).
It was successfully tested against various Apps implementing certificate pinning including the Apple App Store. iOS SSL Kill Switch was initially released at Black Hat Vegas 2012.
For more technical details on how it works, see http://nabla-c0d3.github.io/blog/2013/08/20/ios-ssl-kill-switch-v0-dot-5-released/
WARNING: THIS TWEAK WILL MAKE YOUR DEVICE INSECURE
Installing this tweak allows anyone on the same network as the device to easily perform man-in-the-middle attacks against any SSL or HTTPS connection. This means that it is trivial to get access to emails, websites viewed in Safari and any other data downloaded by any App running on the device.
Users should first download the latest pre-compiled Debian package available in the release section of the project page at: https://github.com/iSECPartners/ios-ssl-kill-switch/releases
The tool was tested on iOS7 running on an iPhone 5S.
iOS SSL Kill Switch will only run on a jailbroken device. Using Cydia, make sure the following packages are installed:
How to install
Download and copy the Debian package to the device; install it:
dpkg -i <package>.deb
Respring the device:
killall -HUP SpringBoard
There should be a new menu in the device’s Settings where you can enable the extension.
Finally, kill and restart the App you want to test.
How to uninstall
dpkg -r com.isecpartners.nabla.sslkillswitch
Intercepting the App Store’s traffic
Additional instructions are available here: http://nabla-c0d3.github.io/blog/2013/08/20/intercepting-the-app-stores-traffic-on-ios/
Most users should just download and install the Debian package. The build requires the Theos suite to be installed; see http://www.iphonedevwiki.net/index.php/Theos/Getting_Started . You first have to create a symlink to your theos installation:
ln -s /opt/theos/ theos
Make sure dpkg is installed. If you have Homebrew, use:
brew install dpkg
Then, the package can be built using:
- v0.6: Added support for iOS 7.
- v0.5: Complete rewrite in order to add support for proxy-ing Apple’s App Store application.
- v0.4: Added hooks for SecTrustEvaluate().
- v0.3: Bug fixes and support for iOS 6.
- v0.2: Initial release.
MIT – See LICENSE.txt
Alban Diquet – https://github.com/nabla-c0d3