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So you can send a binary SMS to a phone that will pass it to SIM and SIM will interpret it via bytecode, to execute whatever, incl. making the phone to send an
by megous 5mo ago
So you can send a binary SMS to a phone that will pass it to SIM and SIM will interpret it via bytecode, to execute whatever, incl. making the phone to send an outgoing SMS, with requested data, silently, wtf? :D And this is a normal documented thing.
I gather that paranoid people did not exist/have power back then, when this was designed.
- ale42 5mo agoMost people outside the field don't know much about all the internals of phones, SIMs, etc., unfortunately... Reminds me two articles about SIM cards autonomously sending SMS messages (found here on HN long time ago, probably) https://medium.com/telecom-expert/what-is-at-t-doing-at-1111340002-c418876c212c https://medium.com/telecom-expert/what-is-at-t-doing-at-1111... https://medium.com/telecom-expert/more-proactive-sims-f8da2ef8b189 https://medium.com/telecom-expert/more-proactive-sims-f8da2e...
- trashb 5mo agoSIM cards are Oracle Java Card. There are companies offering services and SIM (java card) applets for card management and other functions. Also, there are opensource applets. https://github.com/crocs-muni/javacard-curated-list#mobile-telephony-sim https://github.com/crocs-muni/javacard-curated-list#mobile-t...
- tardedmeme 5mo agoI understand why a network would like to be able to do this. I suppose that is why it was written into the standard, and I suppose since it's an obscure feature, networks didn't implement firewalls blocking such messages coming from other networks.