Microsoft patches DoS flaw in its Malware Protection Engine
Posted on 18 June 2014.
Microsoft has released an update for its Malware Protection Engine to fix a privately reported security vulnerability that could allow a denial of service if the Microsoft Malware Protection Engine scans a specially crafted file.

The flaw affects the engine that provides the scanning, detection, and cleaning capabilities for Microsoft antivirus and antispyware software (full list available here).

"An attacker who successfully exploited this vulnerability could prevent the Microsoft Malware Protection Engine from monitoring affected systems until the specially crafted file is manually removed and the service is restarted," the company explained in the advisory.

"There are many ways that an attacker could place a specially crafted file in a location that is scanned by the Microsoft Malware Protection Engine," they explained. "For example, an attacker could use a website to deliver a specially crafted file to the victim's system that is scanned when the website is viewed by the user. An attacker could also deliver a specially crafted file via an email message or in an Instant Messenger message that is scanned when the file is opened. In addition, an attacker could take advantage of websites that accept or host user-provided content, to upload a specially crafted file to a shared location that is scanned by the Malware Protection Engine running on the hosting server."

"If the affected antimalware software has real-time protection turned on, the Microsoft Malware Protection Engine will scan files automatically, leading to exploitation of the vulnerability when the specially crafted file is scanned. If real-time scanning is not enabled, the attacker would need to wait until a scheduled scan occurs in order for the vulnerability to be exploited."

The good news is that enterprise administrators or end users do not have to do anything about this - the default configuration in Microsoft antimalware software helps ensure that malware definitions and the engine are kept up to date automatically.

Another good news is that the vulnerability hasn't been spotted being exploited in the wild. Information about the flaw has been shared by Tavis Ormandy of Google Project Zero.









Spotlight

USBdriveby: Compromising computers with a $20 microcontroller

Posted on 19 December 2014.  |  Security researcher Samy Kamkar has devised a fast and easy way to compromise an unlocked computer and open a backdoor on it: a simple and cheap ($20) pre-programmed Teensy microcontroller.


Weekly newsletter

Reading our newsletter every Monday will keep you up-to-date with security news.
  



Daily digest

Receive a daily digest of the latest security news.
  
DON'T
MISS

Fri, Dec 19th
    COPYRIGHT 1998-2014 BY HELP NET SECURITY.   // READ OUR PRIVACY POLICY // ABOUT US // ADVERTISE //