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Vulnerability: (975497) Vulnerabilities in SMB Could Allow Remote Code Execution
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| Details | |
|---|---|
| Vulnerability name/brief description | (975497) Vulnerabilities in SMB Could Allow Remote Code Execution |
| CVE/CAN name | CVE-2009-3103 |
| Vendor threat level | Critical |
| SophosLabs threat level | Medium |
| Solution | Update: Microsoft have released patch MS09-050 to resolve this issue as of 13 October 2009. There is no patch available at this time, as a suggested workaround please refer to Microsoft's instructions on disabling SMB v2 and configuring your firewall to block access to ports 139 and 445. |
| Vendor description | Microsoft is investigating new public reports of a possible vulnerability in Microsoft Server Message Block (SMB) implementation. We are not aware of attacks that try to use the reported vulnerabilities or of customer impact at this time. |
| SophosLabs comments | Although this is an unpatched, arbitrary code execution vulnerability we need to keep in mind that it affects a relatively small subset of Windows platforms and vulnerable users can be protected via the published workarounds. We have yet to see any samples although proof-of-concept code is freely available on the Internet. |
| SophosLabs testing result | N/A |
| Currently known exploits | At the time of writing SophosLabs has not seen any samples of malware attempting to exploit this vulnerability. Should this situation change samples will be analysed and we will take action as necessary. |
| First sample seen | N/A |
| Discovery date | 07 September 2009 |
| Affected software | 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 |
| References | http://www.microsoft.com/technet/security/advisory/975497.mspx |
| Credits | Microsoft MAPP Laurent Gaffié |
| Revisions | 09 September 2009 - Initial advisory written 14 October 2009 - Updates to the vendor threat level, SophosLabs threat level and solution categories. |
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: 62968
- Created: 9 Sep 2009
- Last updated: 14 Oct 2009
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