Category Archives: Podcasts

Blue Box #70: 2-yr Anniversary show, VoIP security vulnerabilities, Vonage, Comcast, phishing, listener comments and much, much more…

Synopsis:Blue Box #70: 2-yr Anniversary show, VoIP security vulnerabilities, Vonage, Comcast, phishing, listener comments and much, much more…


Welcome to Blue Box: The VoIP Security Podcast #70, a 51-minute podcast  from Dan York and Jonathan Zar covering VoIP security news, comments and opinions.   

Download the show here (MP3, 21MB) or subscribe to the RSS feed to download the show automatically. 

You may also listen to this podcast right now:

NOTE: This show was recorded on October 25, 2007.

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Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-206-350-7280 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there. 

Thank you for listening and please do let us know what you think of the show.

Blue Box SE#021: Interview with ZFone and ZRTP creator Phil Zimmermann by Brenno de Winter

Synopsis: Interview with ZFone and ZRTP creator Phil Zimmermann by Brenno de Winter.


Welcome to Blue Box: The VoIP Security Podcast Special Edition #21, a 44-minute interview between Phil Zimmermann and Brenno de Winter in August 2007.

Download the show here (MP3, 20MB) or subscribe to the RSS feed to download the show automatically.

You may also listen to this podcast right now:


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Brenno de Winter produces a Dutch podcast about information technology news called “ICT Roddels” (http://ictroddels.nl/) and back in early August he sat down with ZFone and ZRTP creator Phil Zimmermann to discuss (in English) what ZFone and ZRTP are all about. Brenno released the interview on his show and then offered it to us to run as a Blue Box show. In the 40-minute interview, Brenno and Phil spend the first 20 or so minutes talking about ZFone, ZRTP and VoIP security and then spend the remainder of the show talking about security in general, Phil’s background and other topics.

While we have interviewed Phil in the past ourselves, it’s been about a year since we last spoke with him and so we thought this might be an interesting update for you to hear. We thank Brenno for making the interview available to us.

I also have to say a word of thanks to long-time contributor Martyn Davies who stepped in at the last moment to provide the intro/outro to this interview. I unfortunately lost my voice after a presentation yesterday (bad news for a podcaster!) and Jonathan is currently traveling – and our goal this year is to make sure we get shows out on Wednesdays.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-206-350-7280 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there.

Thank you for listening and please do let us know what you think of the show.

Blue Box #69: Linksys SPA-941 vulnerability, SIP DDoS, New release of SIPVicious, Asterisk security roadmap, other VoIP security news, listener comments and more

Synopsis:Blue Box #69: Linksys SPA-941 vulnerability, SIP DDoS, New release of SIPVicious, Asterisk security roadmap, other VoIP security news, listener comments and more


Welcome to Blue Box: The VoIP Security Podcast #69, a 46-minute podcast  from Dan York and Jonathan Zar covering VoIP security news, comments and opinions.   

Download the show here (MP3, 21MB) or subscribe to the RSS feed to download the show automatically. 

You may also listen to this podcast right now:

Show Content:

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Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-206-350-7280 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there. 

Thank you for listening and please do let us know what you think of the show.

Blue Box #67: Contest for listeners, discussion about status, some VoIP security news, listener comments

Synopsis:Blue Box #67: Contest for listeners, discussion about status, some VoIP security news, listener comments


Welcome to Blue Box: The VoIP Security Podcast #67, a 20-minute podcast  from Dan York and Jonathan Zar covering VoIP security news, comments and opinions.   

Download the show here (MP3, 21MB) or subscribe to the RSS feed to download the show automatically. 

You may also listen to this podcast right now:

Show Content:

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Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-206-350-2583 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there. 

Thank you for listening and please do let us know what you think of the show.

Blue Box SE#020 – SIP Security discussion with Cullen Jennings of IETF and Cisco

Synopsis: Interview about SIP security with Cullen Jennings, Area Director for the Real-time Applications and Infrastructure area of the Internet Engineering Task Force (IETF).


Welcome to Blue Box: The VoIP Security Podcast Special Edition #20, a 42-minute interview about SIP security with Cullen Jennings of IETF and Cisco.  Recorded at VoiceCon San Francisco in August 2007.

Download the show here (MP3, 19MB) or subscribe to the RSS feed to download the show automatically.

You may also listen to this podcast right now:


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In this Special Edition, I sat down with Cullen Jennings out at VoiceCon San Francisco in August 2007 to talk about SIP security. Cullen had just co-presented with Eric Rescorla a 3-hour tutorial on SIP security and in this interview we covered an overview of the topics covered in that session, such as:

  • challenges in encrypting SIP signaling (forking, early media (including what it is))
  • proposed methods of encrypting voice/media, including ZRTP and DTLS
  • SIP identity
  • SIP outbound, a proposal for helping SIP signaling work across firewalls
  • certificate management in SIP
  • future security issues of concern within SIP

I believe you will find it both a very educational and interesting interview that will help explain some of the various areas of SIP security.

Cullen is a Distinguished Engineer with Cisco Systems but more relevantly is one of the Area Directors for the "Real-time Applications and Infrastructure" (RAI) area of the Internet Engineering Task Force (IETF). Basically almost all of the SIP-related standards move through the RAI area of the IETF. Cullen also has a strong interest in security and has been an author on several of the security-related RFCs and Internet-Drafts related to SIP.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-206-350-2583 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there.

Thank you for listening and please do let us know what you think of the show.

Blue Box #66: Cisco/Grandstream/Thomson VoIP security vulnerabilities, Skype outage, VoiceCon coverage, VoIP security news, listener comments and more..

Synopsis: Blue Box #66: Cisco/Grandstream/Thomson VoIP security vulnerabilities, Skype outage, VoiceCon coverage, VoIP security news, listener comments and more..


Welcome to Blue Box: The VoIP Security Podcast #66, a 56-minute podcast  from Dan York and Jonathan Zar covering VoIP security news, comments and opinions.   

Download the show here (MP3, 21MB) or subscribe to the RSS feed to download the show automatically. 

You may also listen to this podcast right now:

Show Content:

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Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-206-350-2583 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there. 

Thank you for listening and please do let us know what you think of the show.

Blue Box Video Podcast #01 – SIP softphone exploit demonstration by Sipera Systems at VoiceCon San Francisco 2007

Synopsis: Blue Box Video Edition #1: SIP softphone exploit demonstration by Sipera Systems recorded at VoiceCon San Francisco 2007


Welcome to Blue Box: The VoIP Security Podcast Video Edition #1, a 5-minute video podcast from Dan York showing an exploit of a SIP softphone by Sipera Systems.

In this first video podcast, Dan interviewed Sachin Joglekar, Vulnerability Research Lead for Sipera Systems, about the exploit that Sipera first demonstrated at Black Hat USA 2007 last month in Las Vegas. Sachin shows how by sending a specific SIP packet, he can crash the SIP softphone but in doing so have it execute server code to which he can connect via netcat.  He then has a command prompt on the Windows system and can execute arbitrary commands.  In this case he just copied over some files.  He did indicate that they are working with the vendor of the (unnamed) SIP softphone to correct the problem.

The interview was recorded on the show floor of VoiceCon San Francisco 2007.

Download the show here (MP4, 30MB) or subscribe to the RSS feed to download the show automatically. 

You may also view the show here on this page:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-206-350-2583 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there. 

Given that this is our very first "video edition", comments are definitely appreciated.  We may try to do more of these in the future.

Thank you for listening and please do let us know what you think of the show.

P.S. Those of you wanting to know more about how I recorded the video and the tools I used (hint: I just used my Canon point-and-shoot camera) can read my post over on my Disruptive Conversations blog.

Blue Box #65: VoIP fraud case revisited, Black Hat and Defcon presentations, VoIP security, listener comments and more..

Synopsis: Blue Box #65: VoIP fraud case revisited, Black Hat and Defcon presentations, VoIP security news, listener comments and more..


Welcome to Blue Box: The VoIP Security Podcast #65, a 46-minute podcast  from Dan York and Jonathan Zar covering VoIP security news, comments and opinions.   

Download the show here (MP3, 21MB) or subscribe to the RSS feed to download the show automatically. 

NOTE: This show was recorded on August 6, 2007.

You may also listen to this podcast right now:

Show Content:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-206-350-2583 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there. 

Thank you for listening and please do let us know what you think of the show.

Blue Box #64: ARP storms, IPTComm, SRTP animations, VoIP security news, listener comments and more…

Synopsis: Blue Box #64: ARP storms, IPTComm, SRTP animations, VoIP security news, listener comments and more…


Welcome to Blue Box: The VoIP Security Podcast #63, a 38-minute podcast  from Dan York and Jonathan Zar covering VoIP security news, comments and opinions.   

Download the show here (MP3, 15MB) or subscribe to the RSS feed to download the show automatically. 

NOTE: This show was originally recorded on July 26, 2007.

You may also listen to this podcast right now:

Show Content:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-206-350-2583 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there. 

Thank you for listening and please do let us know what you think of the show.

Blue Box SE #19: “The Real Risks of VoIP Security” panel at VON Europe 2007 in Stockholm, Sweden, featuring Martyn Davies, Ari Takanen, Cullen Jennings and Akif Arsoy

Synopsis: "The Real Risks of VoIP Security" panel session at VON Europe in Stockholm, Sweden, in June 2007.  Moderated by Blue Box contributor Martyn Davies, the panel included Ari Takanen of Codenomicon, Cullen Jennings of Cisco and Akif Arsoy of Verisign.


Welcome to Blue Box: The VoIP Security Podcast Special Edition #19, a 55-minute podcast of the panel session "The Real Risks of VoIP Security" from VON Europe 2007 in Stockholm, Sweden, in June 2007.

Download the show here (MP3, 25MB) or subscribe to the RSS feed to download the show automatically.

You may also listen to this podcast right now:


Show Content:

In this Special Edition, we bring you a recording of the panel session at VON Europe in Stockholm, Sweden, in June 2007.  Longtime Blue Box contributor Martyn Davies moderated the panel which included Ari Takanen of Codenomicon, Cullen Jennings of Cisco and Akif Arsoy of Verisign.  Rather than going with canned presentations of slides, the panel was a conversation among the panelists based on questions that Martyn had as well as questions from the audience.  I think you will find it both enjoyable and educational.

The members of the panel are, left-to-right, Martyn Davies (Dialogic), moderator, Ari Takanen (Codenomicon), Cullen Jennings (Cisco) and Akif Arsoy (Verisign):

   
   
   
   

We thank Martyn for contributing this recording and also compliment him on what is one of the best conference recordings we’ve ever offered as far as audio quality goes.  Dan also thanks Cullen Jennings for standing in for him when Dan was suddenly unable to attend Podcamp Europe.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-206-350-2583 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there.

Thank you for listening and please do let us know what you think of the show.