CVE-2009-0085

High

Description

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."

SeverityHigh

CVSS7.1

Exploit probability—

Product

Microsoft Windows

PublishedMar 10, 2009

First seenMar 10, 2009

How to fix

Vendor advisories

docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-007

Affected products

Product	Affected versions	Fixed in
microsoft windows_2000	No range specified	—
microsoft windows_server_2003	No range specified	—
microsoft windows_server_2008	No range specified	—
microsoft windows_vista	No range specified, gold	—
microsoft windows_xp	No range specified	—

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