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Bug #6295

open

TMSI realloc complete leads to SecurityModeReject

Added by osmith 3 months ago.

Status:
New
Priority:
Normal
Assignee:
Category:
-
Target version:
-
Start date:
12/07/2023
Due date:
% Done:

0%

Spec Reference:

Description

With osmo-sgsn 1.11.1 and nano3g, I'm observing the following sccp traffic (pcap in SYS#6582):

  • SecurityModeCommand
  • SecurityModeComplete
  • TMSI realloc complete
  • SecurityModeCommand
  • SecurityModeReject with error code conflict-with-already-existing-integrity-protection-and-or-ciphering-information (13)

I guess we should tell the hnb to forget the ciphering information when doing a tmsi realloc? or there might be a way to not have SecurityModeCommand after TMSI realloc?

Creating the issue for future reference, currently looking into another problem.

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