Mac OS X v10.6.7 addressed a bug I reported in Installer:
From Apple's advisory:
Impact: Visiting a maliciously crafted website may lead to the installation of an agent that contacts an arbitrary server when the user logs in, and mislead the user into thinking that the connection is with Apple
Description: A URL processing issue in Install Helper may lead to the installation of an agent that contacts an arbitrary server when the user logs in. The dialog resulting from a connection failure may lead the user to believe that the connection was attempted with Apple. This issue is addressed by removing Install Helper.
Some additional details:
- A web page could open a url with the x-mini-installer:// scheme, with a host and path of where to attempt to load files.
- It attempts to download a plist pointing it at an update server at every login
- When an update package fails to process properly, the UI displayed instructs a user to run something from their ~/Downloads folder, where a malicious file could have been dropped.
- I did not succeed in getting it to automate the install of arbitrary content.
- This bug could be used to trigger this format string bug