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."
Published: 2009-12-09
Score: 10.0 Critical
EPSS: 66.7% High
KEV: No
Impact: n/a
Action: n/a
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Remediation

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Microsoft Windows 2000 Windows Server 2003 Windows Server 2008 Windows Vista Windows Xp
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2024-08-07T06:38:30.152Z

Reserved: 2009-10-13T00:00:00.000Z

Link: CVE-2009-3677

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2009-12-09T18:30:00.517

Modified: 2025-04-09T00:30:58.490

Link: CVE-2009-3677

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses