GSM security is generally not very well understood by your average "pentest" company. There is one company that is specializing in this domain. Check out http://www.globerelay.com The pentest of a GSM network does involve "normal" security work (e.g. firewall assessment, host hardening, application review, routers security, etc.) It mostly involve testing GSM Network Elements (NE) such as MSC, HLR, BSC, BTS, VMS, OTA, SMSC, IN, etc. Such NEs sometimes run obscure operating systems and are very proprietary. Most of them assume knowledge of digital signalling protocols such as SS7 (MTP, SCCP, TCAP, MAP, ISUP, BSSAP, INAP, CAMEL). The most important part of a GSM network are actually not the NEs themselves but the OSS network that managed them. As such, platforms such as the NMS (Network Management system), the mediation device and the billing system environment are very critical to the security of the GSM infrastructure. For anybody who's interested I have written a paper last year (that was presented at Blackhat Hong Kong and Singapore) on GSM security, so feel free to ask and I'll send you a copy. Regards Emmanuel At 04:32 PM 1/25/2002, Lubomir.Nistor@star-21.de wrote: >I really doubt that there is any company like this.. as not many people on >this planet know how exactly GSM network works, and those people are >building it.. > >Penetration test of GSM net should be done as a normal pen-test, but I >suppose insider attack is where can be done a lot. >outside attacks have to do something with radio engineering and >basestation-phone communication (DoS, wiretaping, ..) > >inside attacks are more interesting, as you can access devices via IP :) >no radio :) >and do some serious (mis)configuration. > > >Although I haven't done any GSM pentests, but i know some radio networks >basics... > >Lubo > >PS: if anybody got some docs about how GSM radio communication works pls >send me a copy (not general descr, but specific protocol descr, fields >descr, timing etc..) >PS2: sources of firmware helps as well.. > >-----Original Message----- >From: ricci_ieong [mailto:ricci_ieongat_private] >Sent: Donnerstag, 24. Januar 2002 04:10 >To: pen-testat_private >Subject: Questions on GSM Penetration test > > >Hello All, > > I would like to know if there is any company offering penetration > test >services onto GSM network not the IP network. How to perform that type of >test? Which company can offer that service? > > Thanks. > >Ricci > > > >_________________________________________________________ > >Do You Yahoo!? > >Get your free @yahoo.com address at http://mail.yahoo.com > > > > >---------------------------------------------------------------------------- >This list is provided by the SecurityFocus Security Intelligence Alert (SIA) >Service. For more information on SecurityFocus' SIA service which >automatically alerts you to the latest security vulnerabilities please see: >https://alerts.securityfocus.com/ > > >---------------------------------------------------------------------------- >This list is provided by the SecurityFocus Security Intelligence Alert (SIA) >Service. For more information on SecurityFocus' SIA service which >automatically alerts you to the latest security vulnerabilities please see: >https://alerts.securityfocus.com/ ---------------------------------------------------------------------------- This list is provided by the SecurityFocus Security Intelligence Alert (SIA) Service. For more information on SecurityFocus' SIA service which automatically alerts you to the latest security vulnerabilities please see: https://alerts.securityfocus.com/
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