CVEvulnerability

CVE-2009-3677

10.0 HIGH Published 2009-12-09 Modified 2026-06-16 Official page ↗
Status
Modified
Published
2009-12-09
Last modified
2026-06-16
Assigner
[email protected]
CVSS 2.0 ([email protected])
10.0 HIGH — AV:N/AC:L/Au:N/C:C/I:C/A:C
Weaknesses
CWE-255, CWE-94

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."

Affected configurations

• microsoft windows 2000 • microsoft windows server 2003 • microsoft windows server 2008 • microsoft windows vista • microsoft windows xp

Related

Weakness · not in database (1)

Weakness · CWE (1)

  • CWE-94 Improper Control of Generation of Code weakness

References