10 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
0.973 High
EPSS
Percentile
99.8%
Microsoft Windows Vista and Server 2008 do not correctly parse SMB version 2 messages.This vulnerability could allow an attacker to execute arbitrary code.
The Server Message Block version 2 (SMBv2) protocol is the successor to the original SMB protocol. SMBv2 is available in Windows Vista, Server 2008 and Windows 7 release candidates.
Windows Vista and Server 2008 fail to properly process fails to properly parse the headers for the Negotiate Protocol Request portion of an SMBv2 message.
An attacker may be able to execute arbitrary code or cause a vulnerable system to crash.
There is currently no solution to this problem. Until patches are available, users and administrators are encouraged to review the below workarounds.
Restrict access
Blocking access to ports 139/tcp
and 445/tcp
on vulnerable systems will mitigate this vulnerability. Administrators can configure mobile systems that use the Windows Firewall to open these ports only when the user is authenticated to a domain controller by using the firewallβs βprofileβ feature.
Disable SMBv2
Disabling SMBv2 will mitigate this issue. The below steps to disable SMBv2 are provided in Microsoft Security Advisory 975497.
net stop server
and then net start server
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Updated: September 10, 2009
Affected
We have not received a statement from the vendor.
The vendor has not provided us with any further information regarding this vulnerability.
Group | Score | Vector |
---|---|---|
Base | ||
Temporal | ||
Environmental |
Thanks to Microsoft and Laurent GaffiΓ© for information that was used in this report.
This document was written by Ryan Giobbi.
CVE IDs: | CVE-2009-3103 |
---|---|
Severity Metric: | 62.70 Date Public: |