Microsoft to issue ASP.net patch out of cycle

Powered by SC Magazine
 

Attackers could steal data.

Microsoft plans to release an emergency patch to plug a major vulnerability in the ASP.net  framework, used by millions of developers to build web applications, the software giant announced.

Limited public exploits began shortly after Microsoft released an advisory last week that acknowledged the flaw.

The bug involves a weakness in the way the ASP.net technology implements encryption that could allow an attacker to tamper with and potentially steal sensitive data, Kevin Brown, a Microsoft engineer, wrote in a blog post. Attackers can send a flood of encrypted messages, known as cipher text, to a targeted server and analyse the error messages they receive to decrypt the rest of the data.

"An attacker who exploited this vulnerability could view data, such as the View State, which was encrypted by the target server, or read data from files on the target server, such as web.config," the Microsoft advisory said. "This would allow the attacker to tamper with the contents of the data. By sending back the altered contents to an affected server, the attacker could observe the error codes returned by the server." 

The vulnerability was disclosed the prior week by security researchers at a hacking conference in Buenos Aires. The researchers demonstrated the ability to exploit the flaw using a tool they released called a Padding Oracle Exploit Tool (POET).

Microsoft then updated a workaround for the issue. But the permanent, out-of-band patch, labeled "important", is coming due to active attacks and continued attempts to evade defences, according to Microsoft.

"The security update is fully tested and ready for release, but will be made available initially only on the Microsoft Download Center," Dave Forstrom, director of Trustworthy Computing at Microsoft, wrote in a blog post. "This enables us to get the update out as quickly as possible, allowing administrators with enterprise installations, or end-users who want to install this security update manually, the ability to test and update their systems immediately."

See original article on scmagazineus.com

Copyright © SC Magazine, US edition


Microsoft to issue ASP.net patch out of cycle
 
 
 
Top Stories
Photos: Global Switch opens Sydney East data centre
First stage opened, to some fanfare.
 
ATO releases long-awaited Bitcoin guidance
Everyday investors escape the tax man.
 
Why the Weather Bureau’s new supercomputer is a 'gamechanger'
IT transformation starts to reap results.
 
 
Sign up to receive iTnews email bulletins
   FOLLOW US...
Latest articles on BIT Latest Articles from BIT
Looking for storage? Seagate has five new small business NAS devices
Aug 22, 2014
Seagate has announced a new portfolio of Networked Attached Storage (NAS) solutions specifically ...
Run a small business in western Sydney?
Aug 15, 2014
This event might be of interest if you're looking to meet other people with a similar interest ...
Buying a tablet? Microsoft's Surface Pro 3 goes on sale this month
Aug 8, 2014
Microsoft has announced its Surface Pro 3 will go on sale in Australia on 28 August from ...
Apple's top MacBook Pro with Retina is now cheaper
Aug 1, 2014
Apple has updated its MacBook Pro range with faster processors and new pricing, including ...
Pass on carbon tax savings, warns ACCC
Jul 24, 2014
The ACCC is warning businesses that supply "regulated goods" to pass on any cost savings ...
Latest Comments
Polls
Which is the most prevalent cyber attack method your organisation faces?




   |   View results
Phishing and social engineering
  68%
 
Advanced persistent threats
  3%
 
Unpatched or unsupported software vulnerabilities
  12%
 
Denial of service attacks
  7%
 
Insider threats
  11%
TOTAL VOTES: 482

Vote