MS12-066 - Vulnerability in HTML Sanitization Component Could Allow Elevation of Privilege (2741517)

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Details
Vulnerability name/brief description MS12-066 - Vulnerability in HTML Sanitization Component Could Allow Elevation of Privilege (2741517)
CVE/CAN name
Vendor threat level Important
SophosLabs threat level High
Solution MS12-066
Vendor description This security update resolves a publicly disclosed vulnerability in Microsoft Office, Microsoft Communications Platforms, Microsoft Server software, and Microsoft Office Web Apps. The vulnerability could allow elevation of privilege if an attacker sends specially crafted content to a user.
SophosLabs comments This publicly disclosed vulnerability arises due to the improper handling of the way HTML strings are sanitized. In order to exploit this vulnerability, an attacker would need to convince the user to click on a specially crafted URL (using web-based social engineering tricks), or send the user a specially crafted chat message containing the link. Specifically, systems where Microsoft Lync or Microsoft Communicator are used frequently and environments where users connect to a SharePoint server are particularly susceptible to this exploit. As this exploit was publicly disclosed, and Microsoft has reported of limited, targeted attacks attempting to exploit the vulnerability, SophosLabs strongly encouraged users to update as quickly as possible.
SophosLabs testing result No SophosLabs testing result found
Currently known exploits No currently known exploits found
First sample seen No samples found
Discovery date 08 Oct 2012
Affected software Microsoft InfoPath 2007 Service Pack 2
Microsoft InfoPath 2007 Service Pack 2
Microsoft InfoPath 2007 Service Pack 3
Microsoft InfoPath 2007 Service Pack 3
Microsoft InfoPath 2010 Service Pack 1 (32-bit editions)
Microsoft InfoPath 2010 Service Pack 1 (32-bit editions)
Microsoft InfoPath 2010 Service Pack 1 (64-bit editions)
Microsoft InfoPath 2010 Service Pack 1 (64-bit editions)
Software Maximum Security Impact Aggregate Severity Rating Updates Replaced
Microsoft Communicator 2007 R2
Microsoft Lync 2010 (32-bit)
Microsoft Lync 2010 (64-bit)
Microsoft Lync 2010 Attendee (admin level install)
Microsoft Lync 2010 Attendee (user level install)[1]
Microsoft SharePoint Server 2007 Service Pack 2 (32-bit editions) Microsoft SharePoint Server 2007 Service Pack 2 (coreserver) (32-bit editions)
Microsoft SharePoint Server 2007 Service Pack 3 (32-bit editions) Microsoft SharePoint Server 2007 Service Pack 3 (coreserver) (32-bit editions)
Microsoft SharePoint Server 2007 Service Pack 2 (64-bit editions) Microsoft SharePoint Server 2007 Service Pack 2 (coreserver) (64-bit editions)
Microsoft SharePoint Server 2007 Service Pack 3 (64-bit editions) Microsoft SharePoint Server 2007 Service Pack 3 (coreserver) (64-bit editions)
Microsoft SharePoint Server 2010 Service Pack 1 Microsoft SharePoint Server 2010 Service Pack 1 (wosrv)
Microsoft SharePoint Server 2010 Service Pack 1 (coreserver)
Microsoft Groove Server 2010 Service Pack 1
Microsoft Windows SharePoint Services 3.0 Service Pack 2 (32-bit version)
Microsoft Windows SharePoint Services 3.0 Service Pack 2 (64-bit version)
Microsoft SharePoint Foundation 2010 Service Pack 1
Microsoft Office Web Apps 2010 Service Pack 1
References
Credits
  • MAPP
Revisions
  • Oct 8, 2012 - Initial analysis written

Explanation of terms

Vulnerability Name/Brief Description:

Vendor identifier plus a brief description of the type of attack.

CVE/CAN Name:

Currently assigned CVE name. If a CVE name doesn't exist the CAN name will be used until a CVE has been assigned.

Vendor Threat Level:

Threat level assigned by the vendor

SophosLabs Threat Level:

Threat level assigned by SophosLabs

  • LOW RISK - There is little chance of this vulnerability being actively exploited by malware.
  • MEDIUM RISK - There is a possibility of this vulnerability being actively exploited by malware.
  • HIGH RISK - There is a strong possibility of this vulnerability being actively exploited by malware.
  • CRITICAL RISK - This vulnerability will almost certainly be actively exploited by malware.

Solution:

Vendor-supplied Patch identifier and recommended solution, or workaround if applicable.

Vendor Description:

Summary of the cause and potential effect of the vulnerability provided by the vendor.

SophosLabs Comments:

SophosLabs' opinions and observations of the vulnerability in question.

SophosLabs Testing Result:

Details of completed lab testing, if applicable. Please note that the lab test environment may differ significantly from user environments.

Currently Known Exploits:

List of identities for known exploits, if applicable.

First Sample Seen:

Date of the first sample seen by SophosLabs.

Discovery Date:

Date of the earliest known publically disclosed advisory.

Affected Software:

Vulnerable platforms and software versions.