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AUSCERT External Security Bulletin Redistribution
ESB-2015.2075
Microsoft Security Bulletin MS15-090: Vulnerabilities in Microsoft Windows
Could Allow Elevation of Privilege (3060716)
12 August 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Windows
Publisher: Microsoft
Operating System: Windows
Impact/Access: Increased Privileges -- Existing Account
Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2015-2430 CVE-2015-2429 CVE-2015-2428
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS15-090
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Microsoft Security Bulletin MS15-090: Vulnerabilities in Microsoft Windows
Could Allow Elevation of Privilege (3060716)
Bulletin Number: MS15-090
Bulletin Title: Vulnerabilities in Microsoft Windows Could Allow Elevation of
Privilege
Severity: Important
KB Article: 3060716
Version: 1.0
Published Date: August 11, 2015
Executive Summary
This security update resolves 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 or convinces a
user to open a specially crafted file that invokes a vulnerable sandboxed
application, allowing an attacker to escape the sandbox.
This security update is rated Important for all supported releases of
Microsoft Windows except Windows 10, which is not affected. For more
information, see the Affected Software section.
Affected Software
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)
Vulnerability Information
Windows Object Manager Elevation of Privilege Vulnerability - CVE-2015-2428
An elevation of privilege vulnerability exists in Windows Object Manager when
it fails to properly validate and enforce impersonation levels. An attacker
who successfully exploited this vulnerability could bypass impersonation-level
security and gain elevated privileges on a targeted system.
In order to exploit this vulnerability, an attacker would have to log on to an
affected system and run a specially crafted application. The vulnerability by
itself does not allow arbitrary code execution; however, an attacker could use
this vulnerability in conjunction with another vulnerability to effect
arbitrary code execution. The update addresses the vulnerability by correcting
how Windows Object Manager handles object symbolic links created by a sandbox
process.
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.
Windows Registry Elevation of Privilege Vulnerability - CVE-2015-2429
An elevation of privilege exists in Microsoft Windows when it improperly
allows certain registry interactions from within vulnerable sandboxed
applications. An attacker who successfully exploited this vulnerability could
improperly interact with the registry and attempt to escape the application
sandbox.
To exploit the vulnerability, an attacker would have to convince the user to
open a specially crafted file that would invoke a vulnerable sandboxed
application, resulting in a compromise of the sandbox. The attacker could then
run programs with the privileges of the logged on user. The update addresses
the vulnerability by preventing improper interaction with the registry by
sandboxed applications.
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.
Windows Filesystem Elevation of Privilege Vulnerability - CVE-2015-2430
An elevation of privilege exists in Microsoft Windows when it improperly
allows certain filesystem interactions from within vulnerable sandboxed
applications. An attacker who successfully exploited this vulnerability could
improperly interact with the filesystem and attempt to escape the application
sandbox.
To exploit the vulnerability, an attacker would have to convince the user to
open a specially crafted file that would invoke a vulnerable sandboxed
application, allowing an attacker to escape the sandbox. The update addresses
the vulnerability by preventing improper interaction with the filesystem by
sandboxed applications.
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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The University of Queensland
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