Vulnerability: MS10-017 - Vulnerabilities in Microsoft Office Excel Could Allow Remote Code Execution (980150)

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	Details
Vulnerability name/brief description	MS10-017 - Vulnerabilities in Microsoft Office Excel Could Allow Remote Code Execution (980150)
CVE/CAN name	CVE-2010-0257 CVE-2010-0258 CVE-2010-0260 CVE-2010-0261 CVE-2010-0262 CVE-2010-0263 CVE-2010-0264
Vendor threat level	Important
SophosLabs threat level	Medium
Solution	MS10-017
Vendor description	This security update resolves seven privately reported vulnerabilities in Microsoft Office Excel. The vulnerabilities could allow remote code execution if a user opens a specially crafted Excel file. An attacker who successfully exploited any of these vulnerabilities could gain the same user rights as the local user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
SophosLabs comments	The vulnerabilities could allow remote code execution if a user opens a specially crafted Excel file. Given that no widespread exploitation of this vulnerability has surfaced, and a patch already exists, this vulnerability has been assigned a medium threat level.
SophosLabs testing result	N/A
Currently known exploits	At the time of writing SophosLabs have not observed any malware attempting to exploit this vulnerability. Should this situation change samples will be analyzed and we will take action as necessary.
First sample seen	N/A
Discovery date	9th March 2010
Affected software	Microsoft Office Excel 2002 Microsoft Office Excel 2003 Microsoft Office Excel 2007 Microsoft Office 2004 for Mac Microsoft Office 2008 for Mac Open XML File Format Converter for Mac Microsoft Office Excel Viewer Microsoft Office Compatibility Pack
References	http://www.microsoft.com/technet/security/bulletin/MS10-017.mspx http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2010-0257 http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2010-0258 http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2010-0260 http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2010-0261 http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2010-0262 http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2010-0263 http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2010-0264
Credits	MAPP
Revisions	9th March 2010 - 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:
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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.