23 Aug
2022
23 Aug
'22
4:48 p.m.
Hi Bastien,
please try to avoid spamming the mailing list with lots of single-line responses on a single day, thanks.
On Mon, Aug 22, 2022 at 07:53:00PM +0200, Bastien Baranoff wrote:
https://github.com/bbaranoff/telco_story/blob/main/README.md
What you are describing is a classic GSM man-in-the-middle attack, combined with a 4G->2G downgrade. I don't see what is new here. It's how MITM on 2G has operated basically forever: You can just 1:1 forward the authentication, but need to crack the Kc before you can talk encrypted from your virtual MS to the real BTS.
--
- Harald Welte laforge@osmocom.org http://laforge.gnumonks.org/
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