7.1 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
COMPLETE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:C/A:N
6.6 Medium
AI Score
Confidence
Low
0.891 High
EPSS
Percentile
98.7%
The Secure Channel (aka SChannel) authentication component in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, and Server 2008, when certificate authentication is used, does not properly validate the client’s key exchange data in Transport Layer Security (TLS) handshake messages, which allows remote attackers to spoof authentication by crafting a TLS packet based on knowledge of the certificate but not the private key, aka “SChannel Spoofing Vulnerability.”
osvdb.org/52521
secunia.com/advisories/34215
www.securitytracker.com/id?1021828
www.us-cert.gov/cas/techalerts/TA09-069A.html
www.vupen.com/english/advisories/2009/0660
docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-007
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6011