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
NICTA no more as CSIRO takes over
Data61 split out under executive.
 
Inside the stalemate on Australia's piracy code
Still not registered almost five months on.
 
IT staff outline deep anger in Macquarie Uni survey
‘Morale at lowest point in a decade’.
 
 
Sign up to receive iTnews email bulletins
   FOLLOW US...
Latest articles on BIT Latest Articles from BIT
Say goodbye to OneDrive Groups
Aug 28, 2015
If you've a) actually been using OneDrive and b) gone so far as to actually have been using ...
Libreoffice 5 review
Aug 24, 2015
It's free! It's open! But does LibreOffice deliver on its promise of a powerful office suite for ...
How to disable Cortana in Windows 10
Aug 21, 2015
Stop Microsoft's personal assistant snooping around.
Uni is optional: 5 tech leaders without a degree
Aug 17, 2015
Already running a business, but thinking about going back to uni? From Bill Gates to Steve Jobs, ...
New features coming to Xero
Aug 17, 2015
Use Xero? Here are some of the things you can look forward to in the coming months.
Latest Comments
Polls
New Windows 10 users, are you upgrading from...




   |   View results
Windows 8
  46%
 
Windows 7
  45%
 
Windows XP
  4%
 
Another operating system
  3%
 
Windows Vista
  2%
TOTAL VOTES: 748

Vote