Vulnerability: MS10-030 - Vulnerability in Outlook Express and Windows Mail Could Allow Remote Code Execution (978542)

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	Details
Vulnerability name/brief description	MS10-030 - Vulnerability in Outlook Express and Windows Mail Could Allow Remote Code Execution (978542)
CVE/CAN name	CVE-2010-0816
Vendor threat level	Critical
SophosLabs threat level	Medium
Solution	MS10-030
Vendor description	This security update resolves a privately reported vulnerability in Outlook Express, Windows Mail, and Windows Live Mail. The vulnerability could allow remote code execution if a user visits a malicious e-mail server. An attacker who successfully exploited this vulnerability 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	In order to exploit this vulnerability an attacker would need to convince his victim to connect to a malicious email server which, although possible through social engineering or targetted attacks, is not as easy as simply opening an infected email attachment. With this in mind, as well as the fact that a patch is now available and no known attacks have been reported, Sophos has classified this threat as medium 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	11 May 2010
Affected software	Microsoft Outlook Express 5.5 Service Pack 2 Microsoft Outlook Express 6 Microsoft Outlook Express 6 Service Pack 1 Windows Mail Windows Live Mail
References	http://www.microsoft.com/technet/security/bulletin/MS10-030.mspx http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2010-0816
Credits	MAPP
Revisions	11 May 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.