Cybersecurity

NANOGGING

There are many network operator group meetings being held these days. Even in the backwater of the South Pacific where I live there is now AUSNOG, and NZNOG is just next door in New Zealand. We now have MENOG in the Middle East and AFNOG in Africa. The original NOG was the North American Network Operators Group (NANOG), and they have the T-Shirts to prove it! NANOG meets three times a year, and I attended NANOG 41 in October 2007. NANOG meetings cover a broad variety of topics, from operational tools, measurement, and peering practices through to a commentary on the state of the Internet industry. Here are my impressions of the meeting. more

Ameritrade Leaks User Information Yet Again, Blames Hacker X

OK, you know things are getting bad when Ameritrade leaks its customer information yet again, and I don't even bother to report it because it's not news anymore. Well, recent updates to the story have prompted me to correct that omission. Yes, it happened again. Roughly a month ago, correspondents began to receive pump-n-dump spam to tagged email addresses which they had given only to Ameritrade... This now marks the third major confirmed leak of customer information from Ameritrade. In addition, the Inquirer reported the loss of 200,000 Ameritrade client files in February 2005. One correspondent informs me that this has happened to him on four or five previous occasions. more

The Case Against DNSSEC

I was talking to my good friend Verner Entwhistle the other day when he suddenly turned to me and said "I don't think we need DNSSEC". Sharp intake of breath. Transpired after a long and involved discussion his case boiled down to four points: 1. SSL provides known and trusted security, DNSSEC is superfluous, 2. DNSSEC is complex and potentially prone to errors, 3. DNSSEC makes DoS attacks worse, 4. DNSSEC does not solve the last mile problem. Let's take them one at a time... more

Defending Networks Against DNS Rebinding Attacks

DNS rebinding attacks are real and can be carried out in the real world. They can penetrate through browsers, Java, Flash, Adobe and can have serious implications for Web 2.0-type applications that pack more code and action onto the client. Such an attack can convert browsers into open network proxies and get around firewalls to access internal documents and services. It requires less than $100 to temporarily hijack 100,000 IP addresses for sending spam and defrauding pay-per-click advertisers. Everyone is at risk and relying on network firewalls is simply not enough. In a paper released by Stanford Security Lab, "Protecting Browsers from DNS Rebinding Attacks," authors Collin Jackson, Adam Barth, Andrew Bortz, Weidong Shao, and Dan Boneh provide ample detail about the nature of this attack as well as strong defenses that can be put in place in order to help protect modern browsers. more

Transition to IPv6 Address

Last month's column looked at the exhaustion of the IPv4 unallocated address pool and the state of preparedness in the Internet to grapple with this issue... There has been a considerable volume of discussion in various IPv6 and address policy forums across the world about how we should respond to this situation in terms of development of address distribution policies. Is it possible to devise address management policies that might both lessen some of the more harmful potential impacts of this forthcoming hiatus in IPv4 address supply, and also provide some impetus to industry to move in the originally intended direction to transition into an IPv6 network? more

Spam: You’ve Come a Long Way, Baby

According to the majority of the testimony at this month's "Spam Summit," held by the U.S. Federal Trade Commission (FTC), the state of the fight against spam is pretty much the same as it has been for the last several years. The two days of presentations can largely be boiled down to the following bullets: Spam volumes continue to increase, being driven by the growth of "botnets"... Oh, and the spam wars are a lot less exciting than they used to be. Case in point: unlike last time, there were no fist-fights at this year's shindig. more

The End of the (IPv4) World is Nigher!

Funny how some topics seem sit on a quiet back burner for years, and then all of a sudden become matters of relatively intense attention. Over the past few weeks we've seen a number of pronouncements on the imminent exhaustion of the IP version 4 address pools. Not only have some of the Regional Internet Registries (RIRs) and some national registry bodies made public statements on the topic, we've now seen ICANN also make its pronouncement on this topic... Why the sudden uptake of interest in this topic? I suspect that a small part of this may be my fault! more

BMW Goes After BMW.cat

In one of the first (if not the first) UDRP cases for .cat, the auto giant BMW appears to have filed a WIPO case over the BMW.cat domain name. Other prospective new TLD operators have tried to suggest in ICANN meetings that these new TLDs do not cause problems with cybersquatting or defensive registrations... Obviously, given the above WIPO case, that statement is false. more

Will Arrest Stem Tide of Spam?

Legitimate email marketers, anti-spam groups and beleaguered recipients got a bit of good news with the arrest last week of a man described as one of the world's most prolific spammers. Robert Alan Soloway, 27, dubbed "the Seattle Spammer" by federal officials, was indicted on 35 charges related to fraudulent Internet activities. Soloway pleaded not guilty to all charges at his May 30 arraignment. You can read more here. Although it's always great when a notorious spammer gets put out of business, such actions probably won't result in a drop in the amount of spam that gets sent... more

Book Review: Sex.com by Kieren McCarthy

On the face of it, Kieren McCarthy's Sex.com was a book that could have written itself: a notorious, well-publicised feud over the most valuable domain name in existence, between two charismatic men -- one a serial entrepreneur with a weakness for hard drugs (Gary Kremen), the other a gifted con-man with delusions of grandeur (Stephen Cohen). It's a story replete with vicious acrimony, multi-million dollar lawsuits, and rumours of gunfights between bounty hunters in the streets of Tijuana. Thankfully, McCarthy wasn't content to just bundle together all the articles he's written about Sex.com over the years and slap a cover on the front... more

Put Security Alongside .XXX

Isn't security as important to discuss as .XSS? The DNS has become an abuse infrastructure, it is no longer just a functional infrastructure. It is not being used by malware, phishing and other Bad Things [TM], it facilitates them. Operational needs require the policy and governance folks to start taking notice. It's high time security got where it needs to be on the agenda, not just because it is important to consider security, but rather because lack of security controls made it a necessity. more

Ongoing Internet Emergency and Domain Names

There is a current ongoing Internet emergency: a critical 0day vulnerability currently exploited in the wild threatens numerous desktop systems which are being compromised and turned into bots, and the domain names hosting it are a significant part of the reason why this attack has not yet been mitigated. This incident is currently being handled by several operational groups. This past February, I sent an email to the Reg-Ops (Registrar Operations) mailing list. The email, which is quoted below, states how DNS abuse (not the DNS infrastructure) is the biggest unmitigated current vulnerability in day-to-day Internet security operations, not to mention abuse. more

Please, Keep the Core Neutral

Many in the technical community attribute the rapid growth and spread of the Internet to innovation that took place at the "edge" of the network, while its "core" was left largely application neutral to provide a universal and predictable building block for innovation. It is this core neutrality that provides a basis for the security and stability of the Internet as a whole. And it is this same core neutrality that is critical to the continued spread of the Internet across the Digital Divide. Unfortunately, when the politics of censorship rather than solely technical concerns drive the coordination of these "core" Internet resources, it threatens the future security and stability of the Internet. This paper proposes a paradigm upon which all the governments of the world have equal access to these core Internet resources to empower them and their citizens with the rights acknowledged in the WSIS Declaration of Principles. more

How Many Bots? How Many Botnets?

We touched on this subject in the past, but recently Rich Kulawiek wrote a very interesting email to NANOG to which I replied, and decided to share my answer here as well: I stopped really counting bots a while back. I insisted, along with many friends, that counting botnets was what matters. When we reached thousands we gave that up. We often quoted anti-nuclear weapons proliferation sentiments from the Cold War, such as: "why be able to destroy the world a thousand times over if once is more than enough?" we often also changed it to say "3 times" as redundancy could be important... more

Web Server Botnets and Server Farms as Attack Platforms

Are file inclusion vulnerabilitiess equivalent to remote code execution? Are servers (both Linux and Windows) now the lower hanging fruit rather than desktop systems? In the February edition of the Virus Bulletin magazine, we (Kfir Damari, Noam Rathaus and Gadi Evron (me) of Beyond Security) wrote an article on cross platform web server malware and their massive use as botnets, spam bots and generally as attack platforms. Web security papers deal mostly with secure coding and application security. In this paper we describe how these are taken to the next level with live attacks and operational problems service providers deal with daily. more