Cybersecurity

An Astonishing Collaboration

Wow. It's out. It's finally, finally out... So there's a bug in DNS, the name-to-address mapping system at the core of most Internet services. DNS goes bad, every website goes bad, and every email goes...somewhere. Not where it was supposed to... I'm pretty proud of what we accomplished here. We got Windows. We got Cisco IOS. We got Nominum. We got BIND 9, and when we couldn't get BIND 8, we got Yahoo, the biggest BIND 8 deployment we knew of, to publicly commit to abandoning it entirely. It was a good day... more

Identifying Spam: MAAWG’s Latest Documents Improve Accuracy of Reputation Systems

The Messaging Anti-Abuse Working Group (MAAWG), of which Return Path (my employer) is a very active participant, met recently in Heidelberg, Germany. Among other exciting projects, they finished two new best practices documents which have been lauded in the press as a big step towards stopping botnet spam... more

Potential Danger Ahead for Registrants: dot-info Abusive Domain Use Policy

ICANN has posted a request by Afilias for a new registry service in relation to "abusive" domains in dot-info. While in general the proposal is motivated by good intentions, the devil is in the details. While most folks (including myself) probably care very little about the .info TLD, my concern is that any bad implementation in .info might be copied or used as a precedent in other more important TLDs, in particular .com run by VeriSign. more

SPIT is in Everyone’s Mouth, Though Not Yet in Everyone’s Ears

Spam over Internet Telephony (SPIT) is viewed by many as a daunting threat. SPIT is much more fatal than email spam, for the annoyance and disturbance factor is much higher. Various academic groups and the industry have made some efforts to find ways to mitigate SPIT. Most ideas in that field are leaning on classical IT security concepts such as intrusion detection systems, black-/white-/greylists, Turing tests/computational puzzles, reputation systems, gatekeeper solutions, etc... We identified the lack of a benchmark testbed for SPIT as a serious gap in the current research on the matter, and this motivated us at the to start working on a first tool for that. more

Will a Global TAR Make DNSSEC Stick?

Two US Government contractors and the National Institute of Science and Technology have released a white paper, "Statement of Needed Internet Capability," detailing possible alternatives and considerations for a Trust Anchor Repository (TAR) to support DNSSEC deployment. The document was released through the DNSSEC-Deployment Group this week with a request that it be circulated as widely as possible to gather feedback. A Trust Anchor Repository (TAR) refers to the concept of a DNS resource record store that contains secure entry point keys... more

Swedish National Defense Radio Agency to Wiretap All Internet Traffic

Several people abroad have started mailing me and others asking if rumors of new legislation to be passed in Sweden on the 17th of June is for real. There are also reports in international forums starting to pop up. This is fairly old news, and I think that most of us are surprised that this has not generated more press both inside and outside Sweden earlier. This legislation will allow for the Swedish National Defense Radio Agency (FRA) to wiretap Internet traffic leaving the country... more

Carpet Bombing in Cyber Space - Say Again?

I was pointed to an article in the Armed Forces Journal where Col Charles W. Williamson III argues that the US Air Force needs to develop a BOTnet army as part of the US military capability for retaliatory strikes. The article brings up some interesting issues, the one that I believe carries the most weight is the argument that we (well, people living on the Internet) are seeing an arms race. It is true that more and more nations are looking into or developing various forms of offensive weapons systems for the use on the Internet... more

.hk the “Most Unsafe” Domains?

Hong Kong domains are the most dangerous in the world; this little factoid from a recent McAfee report generated quite a bit of media coverage, and even made TIME magazine's top stories list. But all is not as it seems, and aspects of the report may have been out of date before the report was even published. McAfee's study seems to be based on a year's worth of data, and last year was a particularly bad year for the Hong Kong domain, thanks to a gang of botnet spammers registering thousands of domains under the .hk ccTLD. These domains were most likely registered using stolen credit cards... more

Uprooting of the DNS Root

The folks at Renesys pointed out earlier this week some interesting activity surrounding the L-root name server, highlighting some activity that should give us all yet another reason to be concerned about the security and integrity of the Internet DNS... considering that a great deal of malware today tends to corrupt the DNS resolution path in order to further exploit compromised end-systems, and that corruption, or any other actual end-system compromise, might well be unnecessary if the root were compromised -- well, think of the possibilities! more

An Account of the Estonian Internet War

About a year ago after coming back from Estonia, I promised I'd send in an account of the Estonian "war". A few months ago I wrote an article for the Georgetown Journal of International Affairs, covering the story of what happened there. This is the "war" that made politicians aware of cyber security and entire countries scared, NATO to "respond" and the US to send in "help". It deserved a better understanding for that alone, whatever actually happened there. more