Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Attacks/Breaches

10/21/2016
11:15 AM
Connect Directly
Twitter
RSS
E-Mail
100%
0%

DDoS Attack On DNS Provider Disrupts Okta, Twitter, Pinterest, Reddit, CNN, Others

Brief but widespread attack illuminated vulnerability of the Internet's Domain Name System (DNS) infrastructure.

[UPDATED 2:40pm ET to reflect another wave of DDoS attacks on Dyn]

A major distributed denial-of-service (DDoS) attack on Internet domain service provider Dyn in the early morning hours on the East Coast today disrupted major websites - including Okta, CNN, Pinterest, Reddit, and Twitter - and provided a grim reminder of the vulnerability of a key element of the Internet's infrastructure.

The Domain Name Service (DNS) basically translates website names into their actual Internet addresses so that when a browser visits a website, for example, the machine is able to find that site.

Dyn said the DDoS attack affected its Managed DNS customers on the East Coast, and service was restored at 9:20 am Eastern Time. The attack began around 7:10 am Eastern Time: "Starting at 11:10 UTC on October 21st-Friday 2016 we began monitoring and mitigating a DDoS attack against our Dyn Managed DNS infrastructure. Some customers may experience increased DNS query latency and delayed zone propagation during this time," Dyn said in a post on its website.

The attacks left websites either inaccessible or with slow-loading pages for some users. Some customers of Okta, the cloud-based multifactor authentication provider, were unable to access servers secured with Okta authentication, including virtual private networks (VPNs). "Our DNS provider is experiencing an issue, preventing lookup of records for some subdomains. Our team is working diligently to fix this," Okta said via Twitter.

Dyn has not provided any details about the nature of the DDoS attack, nor who might be behind it. But speculation ran high, including questions about whether the attacks could be retribution for Dyn's own research about unsavory Internet abuse by some providers, as reported by KrebsOnSecurity.

Some security experts debated whether the attack was a "dry run" by Russian nation-state hackers for the US's election day, where concerns about attacks on news outlets reporting the results of the election could be disrupted via DDoS or other attacks. It wouldn't be unprecedented: self-proclaimed Russian loyalists waged DDoS attacks on NATO and Ukrainian media websites in March of 2014 after NATO's then-secretary general Anders Fogh Rasmussen announced that NATO would not recognize the results of the planned "so-called referendum in Ukraine's Autonomous Republic of Crimea."

KrebsOnSecurity pointed out that the DDoS on Dyn hit after a Dyn researcher presented at the North American Network Operators Group (NANOG) in Dallas on suspicious BGP (Border Gateway Protocol) hijacks and DDoS-for-hire operations. But researcher and blogger Brian Krebs stopped short of attributing today's attack to that presentation. "I have no data to indicate that the attack on Dyn is related to extortion, to Mirai or to any of the companies or individuals [Dyn's Doug] Madory referenced in his talk this week in Dallas," he wrote.

Dyn Managed DNS advanced service monitoring is currently experiencing issues. Customers may notice incorrect probe alerts on their advanced DNS services. Our engineers continue to monitor and investigate the issue. 
 
[UPDATE: At noon ET today, Dyn was hit with another DDoS attack. As of 2:23pm ET, the company said it was experiencing problems with its Dyn Managed DNS advanced service monitoring: "Customers may notice incorrect probe alerts on their advanced DNS services. Our engineers continue to monitor and investigate the issue."]

 

Related Content:

 

 

 

Kelly Jackson Higgins is the Executive Editor of Dark Reading. She is an award-winning veteran technology and business journalist with more than two decades of experience in reporting and editing for various publications, including Network Computing, Secure Enterprise ... View Full Bio
 

Recommended Reading:

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Page 1 / 2   >   >>
liboires
50%
50%
liboires,
User Rank: Apprentice
11/17/2016 | 3:03:55 PM
Re: How to avoide DDOS?
who knows what could eventually happend

 

medicamentfrance.net/
amiee
50%
50%
amiee,
User Rank: Apprentice
10/25/2016 | 7:16:01 AM
How to avoide DDOS?
My site has been DDOS attacked by my competitor several times, is there any way we can avoide it?
Dr.T
50%
50%
Dr.T,
User Rank: Ninja
10/24/2016 | 6:20:59 PM
Re: Public DNS Performance
Nice site. Thanks for sharing. I wonder why google's average response time is higher. 
Dr.T
50%
50%
Dr.T,
User Rank: Ninja
10/24/2016 | 6:19:19 PM
Re: DDoS Attack still on East coast
"This is super frustrating ..."

Tell me about it. did we have to go through this or there as an alternative I wonder.

 
Dr.T
50%
50%
Dr.T,
User Rank: Ninja
10/24/2016 | 6:17:56 PM
Re: This DDOS attack is still going on
"how do i unblock"

I do not think you can.
Dr.T
50%
50%
Dr.T,
User Rank: Ninja
10/24/2016 | 6:17:01 PM
Re: This DDOS attack is still going on
 "brief attack"

If DDoS notign is brief, it would streach way longer. 
Dr.T
50%
50%
Dr.T,
User Rank: Ninja
10/24/2016 | 6:15:46 PM
Dyn?
 

I am surprised why Dyn plays a rutial role in here. Is this the only site these big companies using for a domain name service? It is not really difficult to define different service providers for your own businesses so if one is down alternative will still be able to serve.
webxtrakt
50%
50%
webxtrakt,
User Rank: Apprentice
10/22/2016 | 7:58:12 AM
Public DNS Performance
Follow Public DNS Performance updated hourly via https://webxtrakt.com/public-dns-performance
Lunastar1971*
100%
0%
Lunastar1971*,
User Rank: Apprentice
10/21/2016 | 4:18:38 PM
DDoS Attack still on East coast
The DDoS Attack is still going on on the east coast. And it's 4:18 pm. This is super frustrating!
RuthR770
50%
50%
RuthR770,
User Rank: Apprentice
10/21/2016 | 3:59:35 PM
Re: This DDOS attack is still going on
It's 1 pm on the west coast and some sites are still down.
Page 1 / 2   >   >>
Commentary
Ransomware Is Not the Problem
Adam Shostack, Consultant, Entrepreneur, Technologist, Game Designer,  6/9/2021
Edge-DRsplash-11-edge-ask-the-experts
How Can I Test the Security of My Home-Office Employees' Routers?
John Bock, Senior Research Scientist,  6/7/2021
News
New Ransomware Group Claiming Connection to REvil Gang Surfaces
Jai Vijayan, Contributing Writer,  6/10/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win an Amazon Gift Card! Click Here
Latest Comment: Google's new See No Evil policy......
Current Issue
The State of Cybersecurity Incident Response
In this report learn how enterprises are building their incident response teams and processes, how they research potential compromises, how they respond to new breaches, and what tools and processes they use to remediate problems and improve their cyber defenses for the future.
Flash Poll
How Enterprises are Developing Secure Applications
How Enterprises are Developing Secure Applications
Recent breaches of third-party apps are driving many organizations to think harder about the security of their off-the-shelf software as they continue to move left in secure software development practices.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2021-31664
PUBLISHED: 2021-06-18
RIOT-OS 2021.01 before commit 44741ff99f7a71df45420635b238b9c22093647a contains a buffer overflow which could allow attackers to obtain sensitive information.
CVE-2021-33185
PUBLISHED: 2021-06-18
SerenityOS contains a buffer overflow in the set_range test in TestBitmap which could allow attackers to obtain sensitive information.
CVE-2021-33186
PUBLISHED: 2021-06-18
SerenityOS in test-crypto.cpp contains a stack buffer overflow which could allow attackers to obtain sensitive information.
CVE-2021-31272
PUBLISHED: 2021-06-18
SerenityOS before commit 3844e8569689dd476064a0759d704bc64fb3ca2c contains a directory traversal vulnerability in tar/unzip that may lead to command execution or privilege escalation.
CVE-2021-31660
PUBLISHED: 2021-06-18
RIOT-OS 2021.01 before commit 85da504d2dc30188b89f44c3276fc5a25b31251f contains a buffer overflow which could allow attackers to obtain sensitive information.