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             AUSCERT External Security Bulletin Redistribution

Vulnerability in Silverlight Could Allow Security Feature Bypass (2932677)
                               12 March 2014


        AusCERT Security Bulletin Summary

Product:           Microsoft Silverlight
Publisher:         Microsoft
Operating System:  Windows
                   OS X
Impact/Access:     Reduced Security -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-0319  

Original Bulletin: 

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Microsoft Security Bulletin MS14-014 - Important
Vulnerability in Silverlight Could Allow Security Feature Bypass (2932677)

Published Date: March 11, 2014

Version: 1.0

General Information

Executive Summary

This security update resolves a privately reported vulnerability in Microsoft 
Silverlight. The vulnerability could allow security feature bypass if an 
attacker hosts a website that contains specially crafted Silverlight content 
that is designed to exploit the vulnerability, and then convinces a user to 
view the website. In all cases, however, an attacker would have no way to 
force users to visit a website. Instead, an attacker would have to convince 
users to visit a website, typically by getting them to click a link in an 
email message or in an Instant Messenger message that takes them to the 
attacker's website. It could also be possible to display specially crafted web 
content by using banner advertisements or by using other methods to deliver 
web content to affected systems.

This security update is rated Important for Microsoft Silverlight 5 and 
Microsoft Silverlight 5 Developer Runtime when installed on Mac and all 
supported releases of Microsoft Windows.

Affected Software

Microsoft Silverlight 5

Vulnerability Information

Silverlight DEP/ASLR Bypass Vulnerability - CVE-2014-0319

A security feature bypass vulnerability exists in Silverlight due to improper 
implementation of Data Execution Protection (DEP) and Address Space Layout 
Randomization (ASLR). The vulnerability could allow an attacker to bypass the 
DEP/ASLR security feature, most likely during or in the course of exploiting a 
remote code execution vulnerability.

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