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Microsoft Windows MS-CHAP Authentication Bypass

Secunia Advisory:

SA37543

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Release Date:

2009-12-08

Popularity:

391 views

Critical:

Moderately critical

Impact:

Security Bypass

Where:

From remote

Solution Status:

Vendor Patch

OS:

Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Server
Microsoft Windows Server 2003 Datacenter Edition
Microsoft Windows Server 2003 Enterprise Edition
Microsoft Windows Server 2003 Standard Edition
Microsoft Windows Server 2003 Web Edition
Microsoft Windows Server 2008
Microsoft Windows Storage Server 2003
Microsoft Windows Vista
Microsoft Windows XP Home Edition
Microsoft Windows XP Professional

Secunia CVSS-2 Score:

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Advisory Content (Page 1 of 3)

[ 1 ] [ 2 ] [ 3 ]

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Description:
A vulnerability has been reported in Microsoft Windows, which can be exploited by malicious people to bypass certain security restrictions.

The vulnerability is caused due to an error in the handling of MS-CHAP v2 authentication requests. This can be exploited to gain access to network resources with privileges of a specific authorised user by sending a specially crafted MS-CHAP v2 authentication request to the Internet Authentication Service (IAS).

Change Page:
[ 1 ] [ 2 ] [ 3 ]

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