CVE-2009-3677
Critical
Description
The Internet Authentication Service (IAS) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold and SP1, and Server 2008 Gold does not properly verify the credentials in an MS-CHAP v2 Protected Extensible Authentication Protocol (PEAP) authentication request, which allows remote attackers to access network resources via a malformed request, aka "MS-CHAP Authentication Bypass Vulnerability."
SeverityCritical
CVSS10.0
Exploit probability—
Product
Microsoft Windows
PublishedDec 9, 2009
First seenDec 9, 2009
How to fix
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 | — |
| microsoft windows_xp | No range specified | — |
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