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AUSCERT External Security Bulletin Redistribution
ESB-2015.0561.2
MS15-025: Vulnerabilities in Windows Kernel Could Allow
Elevation of Privilege
17 March 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Windows
Publisher: Microsoft
Operating System: Windows
Impact/Access: Administrator Compromise -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2015-0075 CVE-2015-0073
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS15-025
Comment: To address a packaging issue for customers who are repeatedly
reoffered security update 3033395 when installed on systems running
supported editions of Windows Server 2003, Microsoft released update
3033395-v2 for all supported editions of Windows Server 2003.
Customers who have not already installed the 3033395 update should
install update 3033395-v2 to be fully protected from this
vulnerability. To avoid the possibility of future detection logic
problems, Microsoft recommends that customers running Windows Server
2003 who have already successfully installed the 3033395 update also
apply update 3033395-v2 even though they are already protected from
this vulnerability. Customers running other Microsoft operating
systems are not affected by this rerelease and do not need to take
any action. See Microsoft Knowledge Base Article 3033395 for more
information.
Revision History: March 17 2015: See comment
March 11 2015: Initial Release
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Bulletin Number: MS15-025
Bulletin Title: Vulnerabilities in Windows Kernel Could Allow Elevation of
Privilege
Severity: None
KB Article: 3038680
Version: 1.0
Published Date: March 10, 2015
Description: This security update resolves two privately reported
vulnerabilities in Microsoft Windows. The vulnerabilities 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 run arbitrary code in the security context of the local
system. An attacker could then install programs; view, change, or delete data;
or create new accounts with full user rights.
Executive Summary
This security update resolves vulnerabilities in Microsoft Windows. The most
severe of the vulnerabilities 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 the vulnerability could
run arbitrary code in the security context of the account of another user who
is logged on to the affected system. An attacker could then install programs;
view, change, or delete data; or create new accounts potentially with full
user rights.
This security update is rated Important for all supported releases of
Microsoft Windows.
Affected Software
The following software versions or editions are affected.
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
Windows Vista Service Pack 2
Windows Vista x64 Edition Service Pack 2
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 for 32-bit Systems Service Pack 1 [1]
Windows 7 for x64-based Systems Service Pack 1 [1]
Windows Server 2008 R2 for x64-based Systems Service Pack 1 [1]
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 [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
Windows Server 2012 R2
Windows RT[2]
Windows RT 8.1[2]
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) [1]
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2 (Server Core installation)
[1]The 3035131 update for Windows 7 and Windows Server 2008 R2 has affected
binaries in common with the update being released simultaneously via Security
Advisory 3033929. See the Update FAQ entry in this bulletin to learn how this
could impact customers who download and install updates manually.
[2]This update is available via Windows Update only.
Vulnerability Information
Registry Virtualization Elevation of Privilege Vulnerability - CVE-2015-0073
An elevation of privilege vulnerability exists in the way that Windows
Registry Virtualization improperly allows a user to modify the virtual store
of another user. An attacker who successfully exploited this vulnerability
could run arbitrary code in the security context of the account of another
user who is logged on to the affected system. An attacker could then install
programs; view, change, or delete data; or create new accounts potentially
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 that could
exploit the vulnerability and take control over the account of another user
who is logged on to the affected system. The update addresses the
vulnerability by correcting how Windows Registry Virtualization handles the
virtual store of other users.
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.
Impersonation Level Check Elevation of Privilege Vulnerability - CVE-2015-0075
An elevation of privilege vulnerability exists when Windows fails to properly
validate and enforce impersonation levels. An attacker who successfully
exploited this vulnerability could bypass user account checks to gain elevated
privileges.
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
increase privileges. The update addresses the vulnerability by correcting how
Windows validates impersonation levels.
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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===========================================================================
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The University of Queensland
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