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                           CERT-Renater

               Note d'Information No. 2015/VULN035
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DATE                : 15/04/2015

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S): Windows versions 7, 8, 8.1, Server 2008,
                                 Server 2012.

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KB3042553
https://technet.microsoft.com/en-us/library/security/MS15-034
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Microsoft Security Bulletin MS15-034 - Critical Vulnerability in
HTTP.sys Could Allow Remote Code Execution (3042553)

Published: April 14, 2015

Version: 1.0


Executive Summary

This security update resolves a vulnerability in Microsoft Windows. The
vulnerability could allow remote code execution if an attacker sends a
specially crafted HTTP request to an affected Windows system.

This security update is rated Critical for all supported editions of
Windows 7, Windows Server 2008 R2, Windows 8, Windows Server 2012,
Windows 8.1, and Windows Server 2012 R2. For more information, see the
Affected Software section.


Affected Software

Windows 7

Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1

Windows Server 2008 R2

Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1

Windows 8 and Windows 8.1

Windows 8 for 32-bit Systems
Windows 8 for x64-based Systems
Windows 8.1 for 32-bit Systems
Windows 8.1 for x64-based Systems

Windows Server 2012 and Windows Server 2012 R2

Windows Server 2012
Windows Server 2012 R2

Server Core installation option

Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core
installation)
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2 (Server Core installation)


Vulnerability Information

HTTP.sys Remote Code Execution Vulnerability - CVE-2015-1635

A remote code execution vulnerability exists in the HTTP protocol stack
(HTTP.sys) that is caused when HTTP.sys improperly parses specially
crafted HTTP requests. An attacker who successfully exploited this
vulnerability could execute arbitrary code in the context of the System
account.

To exploit this vulnerability, an attacker would have to send a
specially crafted HTTP request to the affected system. The update
addresses the vulnerability by modifying how the Windows HTTP stack
handles requests.

Microsoft received information about this vulnerability through
coordinated vulnerability disclosure. When this security bulletin was
originally issued, Microsoft had not received any information to
indicate that this vulnerability had been publicly used to attack
customers.


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