Vulnerability Intelligence Report
CVE-2009-3677
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."
No Active Exploit Signals
CVSS Base Score
10.0
HIGH
EPSS Probability:21.82%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
—
SSVC Action
—
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| microsoft | windows_2000 | all |
| microsoft | windows_server_2003 | all |
| microsoft | windows_server_2008 | all |
| microsoft | windows_vista | all |
| microsoft | windows_xp | all |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
21.820%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2009-10-13T00:00:00 |
| Published | 2009-12-09T18:00:00 |
| Patch Date | 2009-12-08 |
| Last Updated | 2024-08-07T06:38:30 |
Community Chatter & Buzz