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AUSCERT External Security Bulletin Redistribution
ESB-2012.0661
Vulnerability in TLS Could Allow Information Disclosure (2655992)
10 July 2012
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Windows
Publisher: Microsoft
Operating System: Windows XP
Windows Server 2003
Windows Vista
Windows Server 2008
Windows 7
Windows Server 2008 R2
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2012-1870
Original Bulletin:
http://technet.microsoft.com/en-us/security/bulletin/MS12-049
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Microsoft Security Bulletin MS12-049 - Important
Vulnerability in TLS Could Allow Information Disclosure (2655992)
Published Date: July 10, 2012
Version: 1.0
General Information
Executive Summary
This security update resolves a publicly disclosed vulnerability in TLS. The
vulnerability could allow information disclosure if an attacker intercepts
encrypted web traffic served from an affected system. All cipher suites that
do not use CBC mode are not affected.
This security update is rated Important for all supported releases of Microsoft
Windows. For more information, see the subsection, Affected and Non-Affected
Software, in this section.
Affected Software
Windows XP Service Pack 3
Windows XP Professional x64 Edition Service Pack 2
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
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for Itanium-based Systems
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
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 (Server Core installation)
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core
installation)
Vulnerability Information
TLS Protocol Vulnerability - CVE-2012-1870
An information disclosure vulnerability exists in TLS encryption protocol. This
vulnerability affects the protocol itself and is not specific to the Windows
operating system. This is an information disclosure vulnerability that allows
the decryption of encrypted TLS traffic. This vulnerability primarily impacts
HTTPS traffic, since the browser is the primary attack vector, and all web
traffic served via HTTPS or mixed content HTTP/HTTPS is affected.
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The University of Queensland
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Internet Email: auscert@auscert.org.au
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