Vulnerability: MS10-028 - Vulnerabilities in Microsoft Visio Could Allow Remote Code Execution (980094)

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	Details
Vulnerability name/brief description	MS10-028 - Vulnerabilities in Microsoft Visio Could Allow Remote Code Execution (980094)
CVE/CAN name	CVE-2010-0254 CVE-2010-0256
Vendor threat level	Important
SophosLabs threat level	Low
Solution	MS10-028
Vendor description	This security update resolves two privately reported vulnerabilities in Microsoft Office Visio. The vulnerabilities could allow remote code execution if a user opens a specially crafted Visio file. An attacker who successfully exploited 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. The security update addresses these vulnerabilities by correcting the way that Microsoft Office Visio validates attributes and calculates indexes when opening specially crafted Visio files.
SophosLabs comments	The two privately reported vulnerabilities in Microsoft Office Visio are remote code execution vulnerabilities and both vulnerabilities are related to issues involving memory handling when opening specially crafted Visio files. An attacker who successfully exploited this vulnerability could run arbitrary code as the logged-on user. However, as Microsoft Office Visio is not widely used in comparison with other Microsoft Office applications like Microsoft Office Word, the impact due to exploiting this vulnerability is not expected to be widespread. As a result, Sophos has classified this threat as low risk.
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	13th April 2010
Affected software	Microsoft Office Visio 2002 Service Pack 2 Microsoft Office Visio 2003 Service Pack 3 Microsoft Office Visio 2007 Service Pack 1 Microsoft Office Visio 2007 Service Pack 2
References	http://www.microsoft.com/technet/security/bulletin/MS10-028.mspx http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2010-0254 http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2010-0256
Credits	Microsoft MAPP
Revisions	13th April 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:
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Vendor Description:
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SophosLabs Comments:
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SophosLabs Testing Result:
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Currently Known Exploits:
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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.