There is a new threat in town known as "SAD DNS" that allows attackers to redirect traffic, putting companies at risk of phishing, data breach, reputation damage, and revenue loss. What is SAD DNS? No, it isn't the domain name system (DNS) feeling moody, but an acronym for a new-found threat -- "Side-channel AttackeD DNS" discovered by researchers that could revive DNS cache poisoning attacks. more
Rod Beckstrom took over as ICANN President/CEO on July 1, 2009, so October 9th marked his 100th day in office -- and a good opportunity to examine the progress made by ICANN during his short tenure. ...to borrow an analogy from American football: when you have the ball in the Red Zone, you need to score touchdowns, not field goals. So far, under Rod's leadership, ICANN has moved down the field on a number of issues. In particular, ICANN scored a "touchdown heard round the world" by bringing the MoU/JPA to a successful conclusion. more
DNSSEC is a mechanism where clients can verify the authenticity of the answers they receive from servers. There are two sides here. The server must supply signed answers, and the client must verify the signatures on those answers. The validation/verification side is widely implemented, but there are very few signed zones... However, if no one signs their zones, those validating resolvers don't have many signatures to check. more
The APNIC Blog has recently published a very interesting article by Willem Toorop of NLnet Labs on the relationship between Security Extensions for the DNS (DNSSEC) and DNS over Transport Layer Security. Willem is probably being deliberately provocative in claiming that "DoT could realistically become a viable replacement for DNSSEC." If provoking a reaction was indeed Willem's intention, then he has succeeded for me, as it has prompted this reaction. more
March has seen the first of the DNS Operations, Analysis, and Research Center (OARC) workshops for the year, where two days of too much DNS is just not enough! These workshops are concentrated within two days of presentations and discussions that focus exclusively on the current state of the DNS. Here are my impressions of the meeting. more
This year, 2013, I got 24 days of IPv6 and DNSSEC measurements. All in all it created 15GB logs with more than 62 million rows. On the 21st of December, early in the morning, the goat was "traditionally" burnt down, however this year with one exception. Via the Swedish newspaper Expressen the arsonists anonymously took the blame and also filmed their own act. more
DNS tunneling -- the ability to encode the data of other programs or protocols in DNS queries and responses -- has been a concern since the late 1990s. If you don't follow DNS closely, however, DNS tunneling likely isn't an issue you would be familiar with. Originally, DNS tunneling was designed simply to bypass the captive portals of Wi-Fi providers, but as with many things on the Web it can be used for nefarious purposes. For many organizations, tunneling isn't even a known suspect and therefore a significant security risk. more
Because DNS is such an omnipresent part of modern networking, it's easy to assume that functional DNS infrastructure can be left running with minimal adjustments and only needs to be investigated in the event of a malfunction. Yet there are small telltale signs that precede DNS issues -- and knowing what they are can help to prevent disruption before it happens. more
The sixth annual Counter-eCrime Operations Summit (CeCOS VI) will engage questions of operational challenges and the development of common resources for the first responders and forensic professionals who protect consumers and enterprises from the ecrime threat every day. This year's meeting will focus on the shifting nature of cybercrime and the attendant challenges of managing that dynamic threatscape. more
A remote exploit in the BIND 9 DNS software could allow hackers to trigger excessive memory use, significantly impacting the performance of DNS and other services running on the same server. A flaw was recently discovered in the regular expression implementation used by the libdns library, which is part of the BIND package. The flaw enables a remote user to cause the 'named' process to consume excessive amounts of memory, eventually crashing the process and tying up server resources to the point at which the server becomes unresponsive. more
In light of increasing reports of malicious activity targeting the DNS infrastructure, ICANN is calling for the full deployment of the Domain Name System Security Extensions (DNSSEC) across all unsecured domain names. more
So I wrote earlier that I though it was good stuff when ICANN released a paper on DNS Security. Yes, I think it was good this paper was released, and yes it points out correctly how important DNSSEC is. But, now when reading it in detail, I find two things that troubles me. And it has to do with management of .ARPA. A top level domain that is used for infrastructural purposes. Like IP-addresses and E.164 numbers... more
ICANN and internet exchange firm Packet Clearing House (PCH) have joined forces with Infocomm Development Authority of Singapore (IDA) and the National University of Singapore (NUS) to launch the first of three facilities designed to boost the adoption of Domain Name System Security (DNSSEC) among country code Top-Level Domains (ccTLDs). The three new facilities, located in Singapore; Zurich, Switzerland (still under construction) and San Jose, California, provide cryptographic security using the recently deployed DNSSEC protocol. more
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
In 2019, we've seen a surge in domain name system (DNS) hijacking attempts and have relayed warnings from the U.S. Cybersecurity and Infrastructure Agency, U.K.'s Cybersecurity Centre, ICANN, and other notable security experts. Although the topic has gained popularity amongst CIOs and CISOs, most companies are still overlooking important security blind spots when it comes to securing their digital assets outside the enterprise firewalls -- domains, DNS, digital certificates. more
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