Vulnerability: (977377) Vulnerability in TLS/SSL Could Allow Spoofing

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	Details
Vulnerability name/brief description	(977377) Vulnerability in TLS/SSL Could Allow Spoofing
CVE/CAN name	CVE-2009-3555
Vendor threat level	None
SophosLabs threat level	High
Solution	None
Vendor description	Microsoft is investigating public reports of a vulnerability in the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols. At this time, Microsoft is not aware of any attacks attempting to exploit the reported vulnerability.
SophosLabs comments	If exploited, this vulnerability could allow a CSRF ( Cross-Site Request Forgery ). This vulnerability has been publicly disclosed and Proof-of-concept code is circulating.
SophosLabs testing result	N/A
Currently known exploits	At the time of writing SophosLabs have not observed any malware attempting to exploit this vulnerability, though Proof-of-concept code is publicly available. Should this situation change samples will be analyzed and we will take action as necessary.
First sample seen	N/A
Discovery date	10th November, 2009
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/advisory/977377.mspx http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3555
Credits	MAPP
Revisions	9 February 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.