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WordPress Vulnerability Affects A Quarter of the Internet

8/08/2014 by

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A fresh vulnerability has been found affecting all versions of the WordPress and Drupal CMS platforms, as well as several Joomla extensions. It enables DDoS attacks that security experts say can’t be mitigated by traditional security measures.

Unfortunately, it casts a wide net, too: Incapsula estimates that the vulnerability endangers more than 250 million websites as a conservative guess, or more than 25% of the Internet website population today.

The vulnerability is of the “bomb” variety, using amplification methods, Incapsula noted:

XML-RPC is a popular Internet protocol used for cross-platform communication. Both WordPress and Drupal include XML-RPC in their core build, using it to execute remote API calls. The vulnerability exploits a loophole in XML-RPC parsing, using a method known as “entity expansion” to initiate amplified processing tasks. Together, these tasks can easily deplete large amounts of CPU and memory resources, resulting in latency and server downtime. In fact, using multiple calls, nested in a single XML document, an offender can deplete hundreds of megabytes of memory at a time.

Security researcher Nir Goldshlager, who first uncovered the issue, noted that it is a variant of known XML attacks.

“This phenomenon is predicated on a well-known cyber-attack, known as the XML Quadratic Blowup Attack,” he noted in an analysis. “This is starkly different from the customary XML bomb exploitation, in the sense that it distorts the Memory Limit and MySQL, and Apache Max Clients works. This bug can be utilized without the aid of any plugins, and it functions smoothly on the default installation of WordPress and Drupal.”

It also warned webmasters not to block their new HTTPS site from Google’s robot.txt crawlers.

Over the coming weeks, Google will release additional information on how to adopt HTTPS, it said.

David Emm, senior security researcher at Kaspersky Lab, argued that the move will offer a “significant incentive to online providers” over time, given the importance to business success of achieving a high search ranking.

This article has been extracted from http://www.infosecurity-magazine.com, please click on this link to read the article in full 
http://www.infosecurity-magazine.com/news/wordpress-vulnerability-affects/

Montash is a multi-award winning, global IT recruitment business. Specialising in permanent and contract positions across mid-senior appointments across a wide range of industry sectors and IT functions, including:

ERP, BI & Data, Information Security, IT Architecture & Strategy, Energy & Technologies, Demand IT and Business Engagement, Digital and E-commerce, Leadership Talent, Infrastructure and Service Delivery, Project and Programme Delivery.

Montash is headquartered in Old Street, London, in the heart of the technology hub. Montash has completed assignments in over 30 countries and has appointed technical professionals from board level to senior and mid management in permanent and contract roles.

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