There are planes like the
Cessna 210 that can get up to 20kft+ altitude. Obviously not at commercial airliner speeds.
Then you have the infrared homing
FIM-92 Stinger which "can be adapted to fire from a wide variety of ground vehicles and helicopters". They have a range of 25,000 feet. 70,000 of them have been produced, I'm sure something like that is obtainable by ISIS through their Iraq acquisitions.
I know it sounds far out and there might be physical reasons why it's not possible, but ISIS have talked about having their own 'air force' before. They don't need a trillion dollar budget to cause chaos in the air.