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AUSCERT External Security Bulletin Redistribution
ESB-2015.1863
Microsoft Security Bulletin MS15-076 Important: Vulnerability in Windows
Remote Procedure Call Could Allow Elevation of Privilege (3067505)
15 July 2015
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AusCERT Security Bulletin Summary
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Product: Microsoft Windows
Publisher: Microsoft
Operating System: Windows
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2015-2370
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS15-076
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Microsoft Security Bulletin MS15-076 Important: Vulnerability in Windows
Remote Procedure Call Could Allow Elevation of Privilege (3067505)
Bulletin Number: MS15-076
Bulletin Title: Vulnerability in Windows Remote Procedure Call Could Allow
Elevation of Privilege
Severity: Important
KB Article: 3067505
Version: 1.0
Published Date: July 14, 2015
Executive Summary
This security update resolves a vulnerability in Microsoft Windows. The
vulnerability, which exists in Windows Remote Procedure Call (RPC)
authentication, could allow elevation of privilege if an attacker logs on to
an affected system and runs a specially crafted application. An attacker who
successfully exploited this vulnerability could take complete control of the
affected system. An attacker could then install programs; view, change, or
delete data; or create new accounts with full user rights.
This security update is rated Important for all supported releases of Windows.
For more information, see the Affected Software section.
Affected Software
Windows Server 2003
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
Windows Server 2003 R2 Service Pack 2
Windows Server 2003 R2 x64 Edition Service Pack 2
Windows Vista
Windows Vista Service Pack 2
Windows Vista x64 Edition Service Pack 2
Windows Server 2008
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for Itanium-based Systems Service Pack 2
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
Windows RT and Windows RT 8.1
Windows RT[1]
Windows RT 8.1[1]
Server Core installation option Windows Server 2008 for 32-bit Systems Service
Pack 2 (Server Core installation)
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core
installation)
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)
[1]This update is available via Windows Update only.
Vulnerability Information
Windows RPC Elevation of Privilege Vulnerability - CVE-2015-2370
An elevation of privilege vulnerability exists in the Microsoft Remote
Procedure Call (RPC) that could allow an attacker to elevate privileges on a
targeted system. The vulnerability is caused when Windows RPC inadvertently
allows DCE/RPC connection reflection.
An attacker who successfully exploited this vulnerability could take complete
control of the affected system. An attacker could then install programs; view,
change, or delete data; or create new accounts with full user rights. To
exploit this vulnerability, an attacker would first have to log on to the
system. An attacker could then run a specially crafted application designed to
elevate privileges.
The update addresses the vulnerability by improving how Windows RPC handles
authentication checks to preclude redirection.
Microsoft received information about this vulnerability through coordinated
vulnerability disclosure. When this security bulletin was issued, Microsoft
had not received any information to indicate that this vulnerability had been
publicly used to attack customers.
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