ASP .NET: Cross-site scripting - Remote with user interaction

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.1830
 MS14-059 Vulnerability in ASP.NET MVC Could Allow Security Feature Bypass
                              15 October 2014

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        AusCERT Security Bulletin Summary
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Product:           ASP .NET
Publisher:         Microsoft
Operating System:  Windows
Impact/Access:     Cross-site Scripting -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-4075  

Original Bulletin: 
   https://technet.microsoft.com/library/security/ms14-059

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MS14-059 Vulnerability in ASP.NET MVC Could Allow Security Feature Bypass

Version: 1.0

Published Date: October 14, 2014

General Information

Executive Summary

This security update resolves a publicly disclosed vulnerability in ASP.NET 
MVC. The vulnerability could allow security feature bypass if an attacker 
convinces a user to click a specially crafted link or to visit a webpage that
contains specially crafted content designed to exploit the vulnerability. In a
web-based attack scenario, an attacker could host a specially crafted website
that is designed to exploit the vulnerability through a web browser, and then
convince a user to view the website. The attacker could also take advantage of
compromised websites and websites that accept or host user-provided content or
advertisements. These websites could contain specially crafted content that 
could exploit the vulnerability. In all cases, however, an attacker would have
no way to force users to view the attacker-controlled content. Instead, an 
attacker would have to convince users to take action, 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, or by getting them to open an 
attachment sent through email.

This security update is rated Important for ASP.NET MVC 2, ASP.NET MVC 3, 
ASP.NET MVC 4, ASP.NET MVC 5, and APS.NET MVC 5.1.

Affected Software

ASP.NET MVC 2.0

ASP.NET MVC 3.0

ASP.NET MVC 4.0

ASP.NET MVC 5.0

ASP.NET MVC 5.1

Vulnerability Information

MVC XSS Vulnerability - CVE-2014-4075

A cross-site scripting (XSS) vulnerability exists in ASP.NET MVC that could 
allow an attacker to inject a client-side script into the user's web browser.
The script could spoof content, disclose information, or take any action that
the user could take on the site on behalf of the targeted user.

To view this vulnerability as a standard entry in the Common Vulnerabilities 
and Exposures list, see CVE-2014-4075.

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