FreeRadius 3.0.12 crash on ubuntu

Olaf Dreyer dreyer at
Fri Mar 17 12:29:50 CET 2017


I am running FreeRadius 3.0.12 on Ubuntu 14.04.5 LTS with 

freeradius				3.0.12-ppa1~trusty
libssl1.0.0:amd64		1.0.1f-1ubuntu2.22

The Radius server is used mainly as AAA server for a bunch of Cisco WLCs with a few 
hundred Cisco WLAN APs behind. We are doing EAP-TLS, the devices only have to present 
their certificates. Additionally it is used for authentication of admin users on Cisco devices, 
here we use the ntlm_auth module. But i think this is not relevant.

The server crashes now quite frequently, the error always looks like this:

Mar 16 22:44:03 server kernel: [2614480.407628] freeradius[13294]: segfault at 44 ip 
00007f21f1317f55 sp 00007f21e4ae5828 error 4 in[7f21f12dc000+55000]

So, this looks like the crash was related to libssl. in general EAP-TLS works fine, several 
thousand authentications per day, but then freeradius crashes with the above error. Might 
be some certificate which openssl 1.0.1f does not understand? Maybe this is a TLSv1.2 
certificate? Or should this be already fixed?


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