WebAPI/Security/MobileConnection

Name of API: Mobile Connection API Reference: https://wiki.mozilla.org/WebAPI/WebMobileConnection

Brief purpose of API: This exposes information about the current mobile voice and data connection to (certain) HTML content.

Use Cases: The primary use case for this is the status bar of the main phone UI.

Inherent threats: Access to sensitive information such as:

ICC-related (SIM/RUIM card)
own phone number and other ICC I/O related features
entering PIN, PIN2, PUK, PUK2 to unlock various states of the  SIM card. Entering the PIN isn't *that* exotic, actually. Some carriers  deliver their SIM cards with the PIN lock enabled, for instance.
changing the PIN (also serves as enabling/disabling the PIN lock.)
device-related
get IMEI, IMEISV
depersonalize (remove network lock)
baseband-related information and features

Threat severity: High

Regular web content (unauthenticated)

• Use cases for unauthenticated code: None
• Authorization model for normal content: None
• Potential mitigations: None

Trusted (authenticated by publisher)

• Use cases for authenticated code: None
• Authorization model: None
• Potential mitigations: None

Certified (vouched for by trusted 3rd party)

• Use cases for certified code: Telephone status UI
• Authorization model: Implicit
• Potential mitigations: None

Notes: Some radio feature are also accessible via Settings API