Accelerate3g5 -- blobb » History » Revision 91
Revision 90 (blobb, 04/26/2017 01:31 PM) → Revision 91/153 (blobb, 04/26/2017 01:32 PM)
h1. Accelerate3g5 -- blobb h2. Summary Trying to come up with a fuzzing interface. h3. Participants * André (email: dr.blobb@gmail.com) h2. Details First setting up the femtocell and understand necessary basics of UMTS communication to do so. (done) Collecting information e.g. slides, talks, docu about fuzzing of wireless protocols. (done) Writing some code to craft requests and run fuzz tests against subscriber. (to be done) Note: first time fuzzing. h2. Test devices TD1: Samsung Galaxy S5 Mini (G800F) OS: Lineage OS (14.1/7.1.1) BB: G800FXXU1BPC3 SIM: MicroSIM TD2: LG Nexus 5 (hammerhead) OS: Android Marshmallow (6.0) BB: M48974A-2.0.50.2.27 SIM: MicroSIM TD3: HTC One M9 OS: Android Lollipop (5.1) BB: 01.04_U11440601_71.02.50709G_F SIM: NanoSIM (cutted MicroSIM) TD4: Samsung S3 (GT-I9300) OS: Android Jelly Bean (4.3) BB: I9300XXUGNA8 SIM: MicroSim h2. Journal +_2017-03-07_+ Pick up package at Sysmocom office. Having an informative conversation with Neels about Jenkins, Docker and build artifacts. +_2017-03-12_+ Set up wiki page. Seeing femtocell on network interface. Compiled source as described, but couldn't configure/launch CN successfully (yet). Next time will try Neels' launch script and same IP range. +_2017-03-15_+ Reading "data sheet [overview]":http://www.ipaccess.com/uploads/wysiwyg_editor/files/2017/S8_S16-Datasheet-v1.0.pdf "data sheet [details]":https://fccid.io/pdf.php?id=1462491 about ip.access nano3G S8. Configuring femtocell via telnet (dry run). Running in HLR issue mentioned in wiki when invoking run.sh. +_2017_04-02_+ Collecting input about fuzzing: papers/theses: >"SMS Fuzzing - SIM Toolkit Attack - B. Alecu, defcon21 2013":https://www.defcon.org/images/defcon-21/dc-21-presentations/Alecu/DEFCON-21-Bogdan-Alecu-Attacking-SIM-Toolkit-with-SMS-WP.pdf >"SMS Vulnerability Analysis on Feature Phones - N. Golde, 2011":http://www.isti.tu-berlin.de/fileadmin/fg214/finished_theses/NicoGolde/diplom_golde.pdf >"Fuzzing the GSM Protocol - B. Hond, master thesis 2011":http://www.ru.nl/publish/pages/769526/scriptie-brinio-final-brinio_hond.pdf talks: >"SMS Fuzzing - Sim Toolkit Attack - B. Alecu, Deepsec 2011":http://www.securitytube.net/video/2518 >"Using OpenBSC for fuzzing of GSM handsets - H. Welte, 26c3 2009":http://mirror.fem-net.de/CCC/26C3/mp4/26c3-3535-en-using_openbsc_for_fuzzing_of_gsm_handsets.mp4 slides: >"MobiDeke: Fuzzing the GSM Protocol Stack - S. Dudek & G. Delugr, hack.lu 2012":http://archive.hack.lu/2012/Fuzzing_The_GSM_Protocol_Stack_-_Sebastien_Dudek_Guillaume_Delugre.pdf >"Base Jumping - Attacking the GSM BB and BTS - grugq, 2010":http://conference.hackinthebox.org/hitbsecconf2010kul/materials/D2T1%20-%20The%20Grugq%20-%20Attacking%20GSM%20Basestations.pdf >"Fuzzing your GSM phone - Harald Welte, 26c3 2009":https://events.ccc.de/congress/2009/Fahrplan/attachments/1503_openbsc_gsm_fuzzing.pdf >"Fuzzing the Phone in your Phone - C. Miller & C. Mulliner, Blackhat 2009":https://engineering.purdue.edu/dcsl/reading/2011/jevin-fuzzing.pdf >"Injecting SMS Messages into Smart Phones for Security Analysis - C. Mulliner, 2009":https://www.mulliner.org/security/sms/feed/injecting_sms_mulliner_miller.pdf >"Security Testing esp. Fuzzing - E. Poll, ????":https://www.cs.ru.nl/E.Poll/ss/slides/12_Fuzzing.pdf +_2017-04-19_+ Resolving HLR issue and set correct IPs in "*.cfg files":https://osmocom.org/attachments/download/2559/3G-config-example-v3.tar. hNodeB connects to hnbgw, but no UE is connecting to it. > [issue from wiki: ...unable to resolve DNS record look up of 0.ipaccess.pool.ntp.org... no trx]. Connect femtocell to LAN with internet access to resolve DNS record look up issue, still no phones are connecting (yet). Adding SIM cards to hlr.db, after creating db successfully [thanks to "andreas":https://osmocom.org/projects/cellular-infrastructure/wiki/Accelerate3g5_--_andreas] +_2017-04-20_+ Create and attach "build_3G.sh":https://osmocom.org/attachments/download/2602/build_3G.sh (adapted from "build_2G.sh":https://osmocom.org/attachments/download/2438/build_2G.sh). Rebuild with correct branch/tag (openbsc:vlr_3G,libosmo-sccp:old_sua). TD1 and TD2 *successfully connected* to femtocell!!! *\o/* *Voice calls work* (TD1<->TD2). +_2017-04-22_+ Create and attach "configure_nano3G.exp":https://projects.osmocom.org/attachments/download/2604/configure_nano3G.exp. > Invoke expect script within "run.sh":https://projects.osmocom.org/attachments/download/2559/3G-config-example-v3.tar to automate initial nano3G configuration via telnet. *SMS work* (TD1<->TD2), probably worked before but have been tested "today". +_2017-04-24_+ Compile OpenBSC with --enable-mgcp-transcoding flag and create 127.0.0.2 on lo. :) Attach refactored version of "build_3G.sh":https://projects.osmocom.org/attachments/download/2605/build_3G.sh. *Data "works"* (TD1<->TD2, TDx<->tun0/192.168.42.1 >Note: data "worked" before (UEs got IP 2017-4-20). But I didn't manage to forward packets from tun0->eth0->inet yet, although the following iptable rule has been applied: >>sudo sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward" >>sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE +_2017-04-25_+ Create and attach "find_nano3G.sh":https://osmocom.org/attachments/download/2609/find_nano3G.sh. Picked up TD4 at a friend's place. Now So now I don't need to change the SIM/USIM card in TD1, which is my "normal" cell phone to test functionality. *Thanks* a lot buddy, in case you might read this. :) +_2017-04-26_+ As it actually belongs to the accelerate3g5 project, I add the "hands-on repo":https://github.com/blobbsen/repo-handson to the journal. > It provides functionality to clone necessary git repos and build accerelate3g5 stack. h2. Conclusions - UE's are connecting and voice calls are working. >- network LED does not indicate whether IP has been assigned by DHCP server. >- umts LED does indicate whether cell is connected to hnbgw, etc pp.
