GPRS vulnerabilities

[Viraf Hathiram <Viraf.Hathiram () optus com au>]

G'day folks

We've talked about the air interface and the sim cards of GSM in an earlier
discussion.  I'm just getting acquainted with GPRS and would like to know if
there are documented cases of the GPRS backbone (GGSN, DNS, etc.) being
attacked from a mobile node.

For those not familiar with GPRS, the network looks like this:

laptop--mobile phone--GSM network--SGSN--GGSN--Internet and several
Intranets

The GGSN is effectively a router and is the first IP device encountered by
the laptop.  It could have firewall and DHCP functions.  It connects to a
DNS, charging gateway, NMS, etc.

Regards
Viraf

Viraf K. Hathiram
Information Security Specialist
'yes' Optus
Tel:  (+61-2) 9342-7002 (forwards to mobile)
Fax:  (+61-2) 9342-8546
Viraf.Hathiram () optus com au


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