Presented at
AppSec USA 2012,
Oct. 26, 2012, 2 p.m.
(45 minutes)
In the last year, 2011, major trusted CAs providing trusted certificates for SSL/TLS in browser scenarios were compromised (e.g. as seen in the Diginotar breach) and based on the current trust models (trusting all registered CAs equally for all domains) exposed vital web applications to the risk of man-in-the-middle attacks. Several approaches are currently discussed to mitigate this risk. The most advanced and closest to final adoption being the technologies discussed by the browser vendors at the recent IETF Web Security working group meetings: HSTS and pinning of certificates. To better protect content providers against the distribution of bogus certificates, an HTTP header extension containing a fingerprint of their certificates linked to a domain address has been defined. This approach, which has been partly tested in Chrome, and already helped identify and protect to some extend Google's web application in the recent Diginotar compromise. Chrome users were able to detect the bogus DigiNotar certificates because Chrome had embedded the hashes of valid Google certificates. Back in July 2011, the hacked DigiNotar certificate authority (CA), which has since gone out of business, was used to issue more than five hundred bogus certificates for companies including Google and various intelligence services.
The presented technologies are cutting edge and although the specification is not final yet, they are in their final stages and currently in roll-out and ready to be used. Other models that compete or complement this approach shall also be discussed (DNSSEC, etc. ).
Presenters:
-
Tobias Gondrom
- Managing Director - Thames Stanley: Information Security and Risk Management Advisory
Tobias Gondrom is Managing Director of Thames Stanley, a CISO and Information Security & Risk Management Advisory based in Hong Kong, United Kingdom and Germany. He has fifteen years of experience in software development, application security, cryptography, electronic signatures and global standardisation organisations working for independent software vendors and large global corporations in the financial, technology and government sector, in America, EMEA and APAC. As the Global Head of the Security Team at Open Text (2005-2007) and from 2000-2004 as the lead of the Security Task Force at IXOS Software AG, he was responsible for security, risk and incident management and introduced and implemented a secure SDLC used globally by development departments in the US, Canada, UK and Germany.
Since 2003 he is the chair of working groups of the IETF (www.ietf.org) in the security area, member of the IETF security directorate, and since 2010 chair of the formed web security WG at the IETF, and a former chapter lead of the German OWASP chapter from 2007 to 2008, and currently board member of OWASP London and member of the OWASP Global Industry Committee. Tobias is the author of the international standards RFC 4998 and RFC 6283 (Evidence Record Syntax) and co-author and contributor to a number of internet standards and papers on security and electronic signatures, as well as the co-author of the book „Secure Electronic Archiving" (ISBN 3-87081-427-6), and frequent presenter at conferences and publication of articles (e.g. AppSec, IETF, ISSE, Moderner Staat, VOI-booklet "Electronic Signature", iX).
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