Operating System:

[Win]

Published:

13 August 2014

Protect yourself against future threats.

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.1375
       Vulnerability in .NET Framework Could Allow Security Feature
                             Bypass (2984625)
                              13 August 2014

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Microsoft .NET Framework
Publisher:         Microsoft
Operating System:  Windows
Impact/Access:     Reduced Security -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-4062  

Original Bulletin: 
   https://technet.microsoft.com/library/security/ms14-046

- --------------------------BEGIN INCLUDED TEXT--------------------

 Microsoft Security Bulletin MS14-046 - Important
Vulnerability in .NET Framework Could Allow Security Feature Bypass (2984625)

Published: August 12, 2014

Version: 1.0

General Information

Executive Summary

This security update resolves a privately reported vulnerability in Microsoft
.NET Framework. The vulnerability could allow security feature bypass if a 
user visits a specially crafted website. In a web-browsing attack scenario, an
attacker who successfully exploited this vulnerability could bypass the 
Address Space Layout Randomization (ASLR) security feature, which helps 
protect users from a broad class of vulnerabilities. The security feature 
bypass by itself does not allow arbitrary code execution. However, an attacker
could use this ASLR bypass vulnerability in conjunction with another 
vulnerability, such as a remote code execution vulnerability, that could take
advantage of the ASLR bypass to run arbitrary code.

This security update is rated Important for Microsoft .NET Framework 2.0 
Service Pack 2, Microsoft .NET Framework 3.0 Service Pack 2, Microsoft .NET 
Framework 3.5, and Microsoft .NET Framework 3.5.1 on affected releases of 
Microsoft Windows.

Affected Software

Windows Server 2003

Windows Vista

Windows Server 2008

Windows 7

Windows 8 & 8.1

Windows Server 2012 and Windows Server 2012 R2

Windows RT and Windows RT 8.1

Vulnerability Information

NET ASLR Vulnerability - CVE-2014-4062

A security feature bypass vulnerability exists in the Microsoft .NET Framework
that could allow an attacker to bypass the Address Space Layout Randomization
(ASLR) security feature, which helps protect users from a broad class of 
vulnerabilities. The security feature bypass by itself does not allow 
arbitrary code execution. However, an attacker could use this ASLR bypass 
vulnerability in conjunction with another vulnerability, such as a remote code
execution vulnerability, that could take advantage of the ASLR bypass to run 
arbitrary code.

To view this vulnerability as a standard entry in the Common Vulnerabilities 
and Exposures list, see CVE-2014-4062.

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967

iQIVAwUBU+qKoBLndAQH1ShLAQLA7xAAo6Zj0ps6P9KrL8MXXOqNDZb/f2z2weKO
rxpx/dt4wJ/TSbS/+6WcDiuG1Nui3cCPicIwmpVKFnhXtZ3d5+o/PmoBMcJHRHbz
pe97jwaD9GMIOgxZsorvkoJoywWQhvIKnfhpEf2TYpqYvV0qTUOPKg1feTSmZezY
wB974RGo6j1k8PvRbB0H4SPOMt5XrqgZ3mndItQvnyB/FroS7zN8I1ucg3RKakKw
VE+lcOjS1054GJRGJ43Fz0pLE5fsBmuQ97g2KDMEX45OZji3KHRxCTeRkFYITuE/
JLQYUkxvWRJ25Eqtg0ckkl0FQZYW7Ir9h7W9X0JxfzLjDB5hd5zLymkys0M6Puf5
p41xzeyfOVKor5H8VXE66Odn6tT8rWrrTSLUmUrwY6gKJATi/1TkG7BxIIdqQG9L
ojngkii+EjlW8+3iNyxmwT090VOuNLyQCwTSBpsfeR1AZOOEBUQR+z7g6dOt+qXw
DM0Tz0jpWHLmxXNbGqVkfQVv3uwkC5DUUJJlC2oYGL1TGmrUmKhZITAXpWI0rMul
TQNof0i1dxK4nb5hqGSLEkoRhkDB/ekhxwKfeNuOS4igdUnV83p/2EbtYUfXoWcl
bVWXSjXubaU6DJy1j9Shs+rgWhXIMj0gqRVqADGrPKzIgAycgC55ZUvtWffyh39Q
3QOZ2cffRaY=
=jt1d
-----END PGP SIGNATURE-----