Vulnerability: MS10-049 - Vulnerabilities in SChannel could allow Remote Code Execution (980436)
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| Details | |
|---|---|
| Vulnerability name/brief description | MS10-049 - Vulnerabilities in SChannel could allow Remote Code Execution (980436) |
| CVE/CAN name | CVE-2009-3555 CVE-2010-2566 |
| Vendor threat level | Critical |
| SophosLabs threat level | Medium |
| Solution | |
| Vendor description | This security update resolves one publicly disclosed vulnerability and one privately reported vulnerability in the Secure Channel (SChannel) security package in Windows. The more severe of these vulnerabilities could allow remote code execution if a user visits a specially crafted Web site that is designed to exploit these vulnerabilities through an Internet Web browser. In all cases, however, an attacker would have no way to force users to visit these Web sites. Instead, an attacker would have to convince users to visit the Web site, typically by getting them to click a link in an e-mail message or in an Instant Messenger message that takes users to the attacker's Web site. |
| SophosLabs comments | The patch encompasses how Windows validates SSL responses from a server as well as implement RFC 5746 (Transport Layer Security Renegotiation Indication Extension). The patch also mediates a vulnerability where an attacker may spoof an authenticated client over a secure TLS/SSL connection. The fact that we are yet to see any malware that exploit these issues has been considered when assigning the SophosLabs threat rating of Medium, although we do recommend that users apply this patch at their earliest convenience. |
| 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 | August 10, 2010 |
| Affected software | 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 Service Packs 1 and 2 Windows Vista x64 Edition Service Packs 1 and 2 Windows Server 2008 for 32-bit Systems and 2 Windows Server 2008 for x64-based Systems No Service Pack and Service Pack 2 Windows Server 2008 for Itanium-based Systems No Service Pack 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/MS10-049.mspx http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2010-2566 http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2009-3555 |
| Credits | Microsoft MAPP |
| Revisions | August 10, 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:
Summary of the cause and potential effect of the vulnerability provided by the vendor.
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.
If you need more information or guidance, then please contact technical support.
- Article ID: 111717
- Created: 10 Aug 2010
- Last updated: 10 Sep 2010
