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Unrated severityNVD Advisory· Published Mar 10, 2009· Updated Jun 16, 2026

CVE-2009-0085

CVE-2009-0085

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."

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

17
  • Microsoft/Windows 2000
    cpe:2.3:o:microsoft:windows_2000:*:sp4:*:*:*:*:*:*
  • Microsoft/Windows Server 20034 versions
    cpe:2.3:o:microsoft:windows_server_2003:*:*:*:*:*:*:*:*+ 3 more
    • cpe:2.3:o:microsoft:windows_server_2003:*:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2003:*:sp1:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2003:*:sp1:itanium:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2003:*:sp2:*:*:*:*:*:*
  • Microsoft/Windows Server 20083 versions
    cpe:2.3:o:microsoft:windows_server_2008:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:o:microsoft:windows_server_2008:*:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2008:*:*:itanium:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2008:*:*:x64:*:*:*:*:*
  • Microsoft/Windows4 versions
    cpe:2.3:o:microsoft:windows_vista:gold:*:*:*:*:*:*:*+ 3 more
    • cpe:2.3:o:microsoft:windows_vista:gold:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_vista:*:sp1:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_vista:*:*:x64:*:*:*:*:*
    • (no CPE)
  • Microsoft/Windows Xp4 versions
    cpe:2.3:o:microsoft:windows_xp:*:sp2:*:*:*:*:*:*+ 3 more
    • cpe:2.3:o:microsoft:windows_xp:*:sp2:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_xp:*:sp2:x64:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_xp:*:*:x64:*:*:*:*:*
  • Microsoft/Windows Secure Channelllm-create

Patches

Vulnerability mechanics

References

7

News mentions

0

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