CVE-2009-0085
The Secure Channel (aka SChannel) authentication component in Microsoft Windows 2000 SP4, XP SP2...
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."
Exploit likelihood
What each source reports
NVD Score used
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."
- Record
CVE-2009-0085- CVSS 2.0
- 7.1 High
AV:N/AC:M/Au:N/C:N/I:C/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE List No score
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."
- Record
CVE-2009-0085- Updated
- 2026-11-02
EUVDEUVD-2009-0094 No score
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."
- Record
EUVD-2009-0094- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-8rwx-2fr5-8x5x No score
The Secure Channel (aka SChannel) authentication component in Microsoft Windows 2000 SP4, XP SP2...
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."
- Record
GHSA-8rwx-2fr5-8x5x- Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-0085 is a high vulnerability (CVSS 7.1) in Microsoft Windows 2000, published March 10, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 15.2%, the 96th percentile. No source names a fixed version.
References
docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-007
securitytracker.com/id?1021828
us-cert.gov/cas/techalerts/TA09-069A.html
vupen.com/english/advisories/2009/0660
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6011
secunia.com/advisories/34215
osvdb.org/52521
nvd.nist.gov/vuln/detail/CVE-2009-0085
github.com/advisories/GHSA-8rwx-2fr5-8x5x