27C3 - Version 1.6.3
27th Chaos Communication Congress
We come in peace
| Speakers | |
|---|---|
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Harald Welte |
|
Steve Markgraf |
| Schedule | |
|---|---|
| Day | Day 3 - 2010-12-29 |
| Room | Saal 1 |
| Start time | 18:30 |
| Duration | 01:00 |
| Info | |
| ID | 3952 |
| Event type | Lecture |
| Track | Hacking |
| Language used for presentation | English |
| Feedback | |
|---|---|
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Running your own GSM stack on a phone
Introducing Project OsmocomBB
In recent years, we have seen several Free Software projects implementing the network side of the GSM protocol. In 2010, OsmocomBB was started to create a free software implementation of the telephone-side.
The OsmocomBB project is a Free Software implementation of the GSM protocol stack running on a mobile phone.
For decades, the cellular industry comprised by cellphone chipset makers and network operators keep their hardware and system-level software as well as GSM protocol stack implementations closed. As a result, it was never possible to send arbitrary data at the lower levels of the GSM protocol stack. Existing phones only allow application-level data to be specified, such as SMS messages, IP over GPRS or circuit-switched data (CSD).
Using OsmocomBB, the security researcher finally has a tool equivalent to an Ethernet card in the TCP/IP protocol world: A simple transceiver that will send arbitrary protocol messages to a GSM network.