Vulnerability: MS10-019 - Vulnerabilities in Windows Could Allow Remote Code Execution (981210)

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	Details
Vulnerability name/brief description	Vulnerabilities in Windows Could Allow Remote Code Execution (981210)
CVE/CAN name	CVE-2010-0486 CVE-2010-0487
Vendor threat level	Critical
SophosLabs threat level	Medium
Solution	MS10-019
Vendor description	This security update resolves two privately reported vulnerabilities in Windows Authenticode Verification that could allow remote code execution. An attacker who successfully exploited either vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
SophosLabs comments	The vulnerabilities could allow remote code execution if a user opens a specially crafted portable executable (PE) and/or Microsoft cabinet file. The vulnerability arises due to the way the Windows Authenticode Signature Verification function (WinVerifyTrust) and the Windows Cabinet File Viewer function omits fields from the file digest when signing and verifying a PE or cabinet file. The exploit involves modifying an existing signed PE or Microsoft cabinet file. The manipulated file can contain unverified portions of the signature and could be crafted in such a way as to add malicious code to the file without invalidating the signature. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
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 Windows 2000 Service Pack 4 Windows XP Service Pack 2 and 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, Windows Vista Service Pack 1, and Windows Vista Service Pack 2 Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and Windows Vista x64 Edition Service Pack 2 Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2 Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2 Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2 Windows 7 for 32-bit Systems Windows 7 for x64-based Systems Windows Server 2008 R2 for x64-based Systems Windows Server 2008 R2 for Itanium-based Systems
References	http://www.microsoft.com/technet/security/bulletin/MS10-019.mspx http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2010-0486 http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2010-0487
Credits	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.