Attacks/Breaches
8/6/2009
12:20 PM
Connect Directly
LinkedIn
Twitter
Google+
RSS
E-Mail
50%
50%

Twitter Downed By Denial Of Service Attack

Following an denial of service attack on Thursday morning, Twitter is back online.

Twitter was unavailable early Thursday morning due to a denial of service attack.

In a blog post, presumably hosted on an unaffected server, Twitter co-founder Biz Stone acknowledged the attack. "Attacks such as this are malicious efforts orchestrated to disrupt and make unavailable services such as online banks, credit card payment gateways, and in this case, Twitter for intended customers or users," he said. "We are defending against this attack now and will continue to update our status blog as we continue to defend and later investigate."

A denial of service attack involves bombarding a Web site or server with more traffic than it can handle, effectively causing online gridlock. Often such attacks are distributed, meaning that multiple computers, usually compromised by malware, send data to the target site in unison.

Twitter was knocked offline about 9:15 a.m. EDT.

Pingdom, a site that tracks server uptime, indicates that Twitter was offline for about two and a half hours.

The Twitter status page says that Twitter availability has been restored. The site's last significant unplanned downtime occurred on May 30 following a software error.

According to Netcraft, Twitter runs on an Apache Web server hosted by Verio.

With the restoration of Twitter, tweets have resumed, many of them about the outage.

Denial of service attacks are relatively common. Earlier this week, Gawker Media sites were hit with a denial of service attack. And last week, AT&T blocked notorious Internet forum 4chan because, it said, the site was undergoing a denial of service attack.

Last week, Internet Systems Consortium warned that BIND 9, the most common domain name server, contained a vulnerability that could be exploited to crash the server, leading to a denial of service. The company said that the vulnerability is actively being exploited and it urged users of the software to update immediately.

InformationWeek Analytics and DarkReading.com have published an independent analysis of security outsourcing. Download the report here (registration required).

Comment  | 
Print  | 
More Insights
Register for Dark Reading Newsletters
White Papers
Cartoon
Current Issue
Flash Poll
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2014-6090
Published: 2015-04-27
Multiple cross-site request forgery (CSRF) vulnerabilities in the (1) DataMappingEditorCommands, (2) DatastoreEditorCommands, and (3) IEGEditorCommands servlets in IBM Curam Social Program Management (SPM) 5.2 SP6 before EP6, 6.0 SP2 before EP26, 6.0.3 before 6.0.3.0 iFix8, 6.0.4 before 6.0.4.5 iFix...

CVE-2014-6092
Published: 2015-04-27
IBM Curam Social Program Management (SPM) 5.2 before SP6 EP6, 6.0 SP2 before EP26, 6.0.4 before 6.0.4.6, and 6.0.5 before 6.0.5.6 requires failed-login handling for web-service accounts to have the same lockout policy as for standard user accounts, which makes it easier for remote attackers to cause...

CVE-2015-0113
Published: 2015-04-27
The Jazz help system in IBM Rational Collaborative Lifecycle Management 4.0 through 5.0.2, Rational Quality Manager 4.0 through 4.0.7 and 5.0 through 5.0.2, Rational Team Concert 4.0 through 4.0.7 and 5.0 through 5.0.2, Rational Requirements Composer 4.0 through 4.0.7, Rational DOORS Next Generation...

CVE-2015-0174
Published: 2015-04-27
The SNMP implementation in IBM WebSphere Application Server (WAS) 8.5 before 8.5.5.5 does not properly handle configuration data, which allows remote authenticated users to obtain sensitive information via unspecified vectors.

CVE-2015-0175
Published: 2015-04-27
IBM WebSphere Application Server (WAS) 8.5 Liberty Profile before 8.5.5.5 does not properly implement authData elements, which allows remote authenticated users to gain privileges via unspecified vectors.

Dark Reading Radio
Archived Dark Reading Radio
Join security and risk expert John Pironti and Dark Reading Editor-in-Chief Tim Wilson for a live online discussion of the sea-changing shift in security strategy and the many ways it is affecting IT and business.