7.8 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:C/I:N/A:N
0.089 Low
EPSS
Percentile
94.5%
A vulnerability in the Microsoft Windows Vista firewall may allow an attacker to send unfiltered IPv6 traffic to a vulnerable system.
Internet Protocol version 6 (IPv6) is an IP standard that is designed to replace the Internet Protocol version 4 (IPv4). The Microsoft Teredo service is used by Microsoft Windows Vista, XP, and Server 2003 to allow clients with only IPv4 connectivity to obtain and use publicly routable IPv6 addresses.
The Teredo service must be manually enabled by an administrator in Windows XP and Server 2003. The Teredo service is enabled by default in Windows Vista, but is not activated until an application requests an IPv6 address.
The Windows firewall does not properly apply stateful packet inspection rules to incoming Teredo traffic.
Note that the Teredo service may create a tunnel through perimeter firewalls, bypassing access control lists and content inspection filtering. See RFC 4380 section 7.1 for more details.
A remote, unautheticated attacker may be able to send unsolicited and unfiltered IPv6 traffic to a vulnerable system.
Update
Microsoft has released an update to address this issue. Users are encourgaed to review Microsoft Security Bulletin MS07-038 and take appropriate action.
Disable Teredo
Disabling the Teredo service will mitigate this vulnerability. See Microsoft Security Bulletin MS07-038 for information on how to disable Teredo.
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Notified: July 11, 2007 Updated: July 10, 2007
Affected
We have not received a statement from the vendor.
The vendor has not provided us with any further information regarding this vulnerability.
See <http://www.microsoft.com/technet/security/bulletin/ms07-038.mspx> for more details.
If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23101321 Feedback>).
Group | Score | Vector |
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Thanks to Symantec and Microsoft for information that was used in this report.
This document was written by Ryan Giobbi.
CVE IDs: | CVE-2007-3038 |
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Severity Metric: | 1.35 Date Public: |