Juniper CoA mirror attributes
lists+freeradius at daork.net
Tue Sep 3 07:49:34 CEST 2019
Working with some colleagues, we have found a breaking change in behaviour between (believe it or not) 2.2.x and 3.0.x for the Juniper mirror attributes, below:
ATTRIBUTE ERX-LI-Action 58 integer encrypt=2
ATTRIBUTE ERX-Med-Dev-Handle 59 octets encrypt=2
ATTRIBUTE ERX-Med-Ip-Address 60 ipaddr encrypt=2
ATTRIBUTE ERX-Med-Port-Number 61 integer encrypt=2
The make_tunnel_password function sets a tag of 00 now for these, where in 2.2.9 it does not. Juniper routers implementing this expect a salt+password, but not tag.
These attributes are encoded correctly in an Access-Accept, but not in a CoA.
This looks to have been changed for both Access-Accept and CoA 10 years ago in c5aa669eeb6, and was fixed for Access-Accept in 5dcd6495fcd.
I’d like to submit a patch to fix this, mirroring the functionality of Access-Accept only encoding a tag if has_tag is set in the dictionary, but, not sure if this will break things in other dictionaries… Is there a difference between tunnel-password encryption between CoA and Access-Accept, or, should we trust the dictionary for both here?
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