Security Market Segment LS
Tuesday, 20 June 2017 07:01

Stack Clash flaw opens Linux, BSDs to local exploit Featured

By

Cloud security provider Qualys has released details of a vulnerability related to memory management in most *NIX-like operating systems.

The vulnerability, called Stack Clash, affects Linux, OpenBSD, NetBSD, FreeBSD and Solaris, on the i386 and amd64 platforms and can be exploited to corrupt memory and execute arbitrary code.

Qualys said that the vulnerability, as far as the seven exploits it had developed showed, was not exploitable remotely, which means that an attacker would have to already be on a system as an unprivileged user in order to cause mischief.

The company released details of the vulnerability in co-ordination with major Linux and other distributions so that patches could be made available on Monday.

{laodposition sam08}Explaining the nature of the vulnerability, Qualys said that each program used a special memory region called the stack which would increase automatically in size when needed. However if the stack grew too much and gained too much proximity to another memory region, then the program in question could confuse the stack with another memory region.

A potential attacker could exploit this confusion to either overwrite the stack with another memory region or vice versa.

This type of vulnerability is not new, having been exploited in 2005 and 2010. But, Qualys said, though Linux developers had introduced a stack guard-page to prevent such exploits, a stack clash was still possible.

The Qualys researchers said while the primary Stack Clash vulnerability was a single flaw, there were others that were related and could be exploited independently.


Subscribe to ITWIRE UPDATE Newsletter here

PROMOTE YOUR WEBINAR ON ITWIRE

It's all about Webinars.

Marketing budgets are now focused on Webinars combined with Lead Generation.

If you wish to promote a Webinar we recommend at least a 3 to 4 week campaign prior to your event.

The iTWire campaign will include extensive adverts on our News Site itwire.com and prominent Newsletter promotion https://itwire.com/itwire-update.html and Promotional News & Editorial. Plus a video interview of the key speaker on iTWire TV https://www.youtube.com/c/iTWireTV/videos which will be used in Promotional Posts on the iTWire Home Page.

Now we are coming out of Lockdown iTWire will be focussed to assisting with your webinatrs and campaigns and assassistance via part payments and extended terms, a Webinar Business Booster Pack and other supportive programs. We can also create your adverts and written content plus coordinate your video interview.

We look forward to discussing your campaign goals with you. Please click the button below.

MORE INFO HERE!

INTRODUCING ITWIRE TV

iTWire TV offers a unique value to the Tech Sector by providing a range of video interviews, news, views and reviews, and also provides the opportunity for vendors to promote your company and your marketing messages.

We work with you to develop the message and conduct the interview or product review in a safe and collaborative way. Unlike other Tech YouTube channels, we create a story around your message and post that on the homepage of ITWire, linking to your message.

In addition, your interview post message can be displayed in up to 7 different post displays on our the iTWire.com site to drive traffic and readers to your video content and downloads. This can be a significant Lead Generation opportunity for your business.

We also provide 3 videos in one recording/sitting if you require so that you have a series of videos to promote to your customers. Your sales team can add your emails to sales collateral and to the footer of their sales and marketing emails.

See the latest in Tech News, Views, Interviews, Reviews, Product Promos and Events. Plus funny videos from our readers and customers.

SEE WHAT'S ON ITWIRE TV NOW!

BACK TO HOME PAGE
Sam Varghese

Sam Varghese has been writing for iTWire since 2006, a year after the site came into existence. For nearly a decade thereafter, he wrote mostly about free and open source software, based on his own use of this genre of software. Since May 2016, he has been writing across many areas of technology. He has been a journalist for nearly 40 years in India (Indian Express and Deccan Herald), the UAE (Khaleej Times) and Australia (Daily Commercial News (now defunct) and The Age). His personal blog is titled Irregular Expression.

Share News tips for the iTWire Journalists? Your tip will be anonymous

WEBINARS ONLINE & ON-DEMAND

GUEST ARTICLES

VENDOR NEWS

Guest Opinion

Guest Reviews

Guest Research

Guest Research & Case Studies

Channel News

Comments