The .gov top-level domain suffered a DNSSEC problem today and was unavailable to some internet users, according to reports.
According to mailing lists and the SANS Internet Storm Center, it appeared that .gov rolled one of its DNSSEC keys without telling the root zone about the update.
This meant that anyone whose DNS servers do strict DNSSEC validation — a relatively small number of networks — would have been unable to access .gov web sites, email and other resources.
As a matter of policy, all second-level .gov domains have to be DNSSEC-signed.
The problem was corrected quite quickly — looks like within an hour or two — but as SANS noted, caching issues may prolong the impact.
Both .gov and the root zone are managed by Verisign, which isn’t on the best of terms with the US government at the moment.
An independent security study has given ICANN a couple dozen very good reasons to continue outlaw “dotless” domain names, but stopped short of recommending an outright ban.
The study, conducted by boutique security outfit Carve Systems and published by ICANN this morning, confirms that dotless domains — as it sounds, a single TLD label with no second-level domain and no dot — are potentially “dangerous”.
If dotless domains were to be allowed by ICANN, internet users may unwittingly send their private data across the internet instead of a local network, Carve found.
That’s basically the same “internal name collision” problem outlined in a separate paper, also published today, by Interisle Consulting (more on that later).
But dotless domains would also open up networks to serious vulnerabilities such as cookie leakage and cross-site scripting attacks, according to the report.
“A bug in a dotless website could be used to target any website a user frequents,” it says.
Internet Explorer, one of the many applications tested by Carve, automatically assumes dotless domains are local network resources and gives them a higher degree of trust, it says.
Such domains also pose risks to users of standard local networking software and residential internet routers, the study found. It’s not just Windows boxes either — MacOS and Unix could also be affected.
These are just a few of the 25 distinct security risks Carve identified, 10 of which are considered serious.
ICANN has a default prohibition on dotless gTLDs in the new gTLD Applicant Guidebook, but it’s allowed would-be registries to specially request the ability to go dotless via Extended Evaluation and the Registry Services Evaluation Process (with no guarantee of success, of course).
So far, Google is the only high-profile new gTLD applicant to say it wants a dotless domain. It wants to turn .search into such a service and expects to make a request for it via RSEP.
Other portfolio applicants, such as Donuts and Uniregistry, have also said they’re in favor of dotless gTLDs.
Given the breadth of the potential problems identified by Carve, you might expect a recommendation that dotless domains should be banned outright. But that didn’t happen.
Instead, the company has recommended that only certain strings likely to have a huge impact on many internet users — such as “mail” and “local” — be permanently prohibited as dotless TLDs.
It also recommends lots of ways ICANN could allow dotless domains and mitigate the risk. For example, it suggests massive educational outreach to hardware and software vendors and to end users.
Establish guidelines for software and hardware manufacturers to follow when selecting default dotless names for use on private networks. These organizations should use names from a restricted set of dotless domain names that will never be allowed on the public Internet.
Given that most people have never heard of ICANN, that internet standards generally take a long time to adopt, and allowing for regular hardware upgrade cycles, I couldn’t see ICANN pulling off such a feat for at least five to 10 years.
I can’t see ICANN approving any dotless domains any time soon, but it does appear to have wiggle-room in future. ICANN said:
The ICANN Board New gTLD Program Committee (NGPC) will consider dotless domain names and an appropriate risk mitigation approach at its upcoming meeting in August.
Verisign has escalated its war against competition by telling its government masters that it is not ready to add new gTLDs to the DNS root, raising eyebrows at NTIA.
The company told the US National Telecommunications and Information Administration in late May that the lack of uniform monitoring across the 13 root servers means it would put internet security and stability at risk to start delegating new gTLDs now.
In response, the NTIA told Verisign that its recent position on DNS security is “troubling”. It demanded confirmation that Verisign is not planning to block new gTLDs from being delegated.
Verisign senior VP Pat Kane wrote in the May letter:
we strongly believe certain issues have not been addressed and must be addressed before any root zone managers, including Verisign, are ready to implement the new gTLD Program.
We want to be clearly on record as reporting out this critical information to NTIA unequivocally as we believe a complete assessment of the critical issues remain unaddressed which left unremediated could jeopardize the security and stability of the DNS.
we strongly recommend that the previous advice related to this topic be implemented and the capability for root server system monitoring, instrumentation, and management capabilities be developed and operationalized prior to beginning delegations.
Verisign is so far the only root server operator to publicly express concerns about the lacking of coordinated monitoring, and many people believe that the company is simply desperately trying to delay competition for its $800 million .com business for as long as possible.
These people note that in early November 2012, Verisign signed a joint letter with ICANN and NTIA that said:
the Root Zone Partners are able to process at least 100 new TLDs per week and will commit the necessary resources to meet all root zone management volume increases associated with the new gTLD program
That letter was signed before NTIA stripped Verisign of its right to increase .com prices every year, depriving it of tens or hundreds of millions of dollars of additional revenue.
Some say that Verisign is raising spurious security concerns now purely because it’s worried about its bottom line.
NTIA is beginning to sound like one of these critics. In its response to the May 30 letter, sent by NTIA and published by ICANN on Saturday, deputy associate administrator Vernita Harris wrote:
NTIA and VeriSign have historically had a strong working relationship, but inconsistencies in VeriSign’s position in recent months are troubling… NTIA fully expects VeriSign to process change requests when it receives an authorization to delegate a new gTLD. So that there will be no doubt on this point, please provide me a written confirmation no later than August 16, 2013 that VeriSign will process change requests for the new gTLD program when authorized to delegate a new gTLD.
Harris said that a system is already in place that would allow the emergency rollback of the root zone, basically ‘un-delegating’ any gTLD that proves to cause a security or stability problem.
This would be “sufficient for the delegation of new gTLDs”, she wrote.
Could Verisign block new gTLDs?
It’s worth a reminder at this point that ICANN’s power over the DNS root is something of a facade.
Verisign, as operator of the master A root server, holds the technical keys to the kingdom. Under its NTIA contract, it only processes changes to the root — such as adding a TLD — when NTIA tells it to.
NTIA in practice merely passes on the recommendations of IANA, the department within ICANN that has the power to ask for changes to the root zone, also under contract with NTIA.
Verisign or NTIA in theory could refuse to delegate new gTLDs — recall that when .xxx was heading to the root the European Union asked NTIA to delay the delegation.
In practice, it seems unlikely that either party would stand in the way of new gTLDs at the root, but the Verisign rhetoric in recent months suggests that it is in no mood to play nicely.
To refuse to delegate gTLDs out of commercial best interests would be seen as irresponsible, however, and would likely put its role as custodian of the root at risk.
That said, if Verisign turns out to be the lone voice of sanity when it comes to DNS security, it is ICANN and NTIA that will ultimately look like they’re the irresponsible parties.
Verisign now has until August 16 to confirm that it will not make trouble. I expect it to do so under protest.
According to the NTIA, ICANN’s Root Server Stability Advisory Committee is currently working on two documents — RSSAC001 and RSSAC002 — that will outline “the parameters of the basis of an early warning system” that will address Verisign’s concerns about root server management.
These documents are likely to be published within weeks, according to the NTIA letter.
Meanwhile, we’re also waiting for the publication of Interisle Consulting’s independent report into the internal name collision issue, which is expected to recommend that gTLDs such as .corp and .home are put on hold. I’m expecting this to be published any day now.
Two UK banks suffered downtime over the weekend after apparently failing to renew their domain name registrations.
Clydesdale Bank and Yorkshire Bank, which offer online banking services at cbonline.co.uk and ybonline.co.uk respectively, both blamed a “systems update” for the downtime.
But some customers reported seeing a registrar’s renewal page when they attempted to access the sites, and others are reportedly still seeing difficulties consistent with DNS propagation delays.
Both domain names have expiry dates of July 26, according to Whois records.
Thankfully, the banks, both of which are owned by National Australia Bank, managed to retain control of their domains. If they’d fallen into third party hands things could have been a lot worse.
Combined, the banks have revenue of a couple of billion pounds.
Google and other members of the New gTLD Applicant Group are happy to let ICANN put their applications on hold in response to security concerns raised by Verisign.
During the ICANN 46 Public Forum in Durban on Thursday, NTAG’s Alex Stamos — CTO of .secure applicant Artemis — said that agreement had been reached that about half a dozen applications could be delayed:
NTAG has consensus that we are willing to allow these small numbers of TLDs that have a significant real risk to be delayed until technical implementations can be put in place. There’s going to be no objection from the NTAG on that.
While he didn’t name the strings, he was referring to gTLDs such as .home and .corp, which were highlighted earlier in the week as having large amounts of error traffic at the DNS root.
There’s a worry, originally expressed by Verisign in April and independent consultant Interisle this week, that collisions between new gTLDs and widely-used internal network names will lead to data leakage and other security problems.
Google’s Jordyn Buchanan also took the mic at the Public Forum to say that Google will gladly put its uncontested application for .ads — which Interisle says gets over 5 million root queries a day — on hold until any security problems are mitigated.
Two members of the board described Stamos’ proposal as “reasonable”.
Both Stamos and ICANN CEO Fadi Chehade indirectly criticised Verisign for the PR campaign it has recently built around its new gTLD security concerns, which has led to somewhat one-sided articles in the tech press and mainstream media such as the Washington Post.
What we do object to is the use of the risk posed by a small, tiny, tiny fraction — my personal guess would be six, seven, eight possible name spaces that have any real impact — to then tar the entire project with a big brush. For contracted parties to go out to the Washington Post and plant stories about the 911 system not working because new TLDs are turned on is completely irresponsible and is clearly not about fixing the internet but is about undermining the internet and undermining new gTLDs.
Later, in response to comments on the same topic from the Association of National Advertisers, which suggested that emergency services could fail if new gTLDs go live, Chehade said:
Creating an unnecessary alarm is equally irresponsible… as publicly responsible members of one community, let’s measure how much alarm we raise. And in the trademark case, with all due respect it ended up, frankly, not looking good for anyone at the end.
That’s a reference to the ANA’s original campaign against new gTLDs, which wound up producing not much more than a lot of column inches about an utterly pointless Congressional hearing in late 2011.
Chehade and the ANA representative this time agreed publicly to work together on better terms.