Microsoft .NET Framework 'System.Net.Sockets' Namespace Security Bypass Vulnerability

Bugtraq ID:	48991
Class:	Design Error
CVE:	CVE-2011-1978
Remote:	Yes
Local:	No
Published:	Aug 09 2011 12:00AM
Updated:	Aug 18 2011 04:40PM
Credit:	Michael J. Liu
Vulnerable:	Microsoft .NET Framework 3.5.1 Microsoft .NET Framework 4.0 Microsoft .NET Framework 3.5 Microsoft .NET Framework 2.0 SP2 Avaya Messaging Application Server 5.2 Avaya Messaging Application Server 5 Avaya Messaging Application Server 4 Avaya Meeting Exchange - Webportal 0 Avaya Meeting Exchange - Web Conferencing Server 0 Avaya Meeting Exchange - Streaming Server 0 Avaya Meeting Exchange - Recording Server 0 Avaya Meeting Exchange - Client Registration Server 0 Avaya Meeting Exchange 5.0 .0.52 Avaya Meeting Exchange 5.2 SP2 Avaya Meeting Exchange 5.2 SP1 Avaya Meeting Exchange 5.2 Avaya Meeting Exchange 5.1 SP1 Avaya Meeting Exchange 5.1 Avaya Meeting Exchange 5.0 SP2 Avaya Meeting Exchange 5.0 SP1 Avaya Meeting Exchange 5.0 Avaya Communication Server 1000 Telephony Manager 4.0 Avaya Communication Server 1000 Telephony Manager 3.0 Avaya CallPilot 5.0 Avaya CallPilot 4.0 Avaya Aura Conferencing 6.0 Standard
Not Vulnerable:

Microsoft .NET Framework 'System.Net.Sockets' Namespace Security Bypass Vulnerability

The Microsoft .NET Framework is prone to a security-bypass vulnerability.

Attackers can exploit this issue to perform denial-of-service attacks, scan network resources, and obtain potentially sensitive information that was not intended to be disclosed.

Microsoft .NET Framework 'System.Net.Sockets' Namespace Security Bypass Vulnerability

Attackers can use a browser to exploit this issue.

Microsoft .NET Framework 'System.Net.Sockets' Namespace Security Bypass Vulnerability

Solution:
Vendor updates are available. Please see the references for more information.


Microsoft .NET Framework 2.0 SP2

• Microsoft Security Update for Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2003 and Windows X
  http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=27 071


• Microsoft Security Update for Microsoft .NET Framework 2.0 Service Pack 2 on Windows Vista Service Pack 2 and
  http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=27 072

Microsoft .NET Framework 4.0

• Microsoft Security Update for Microsoft .NET Framework 4
  http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=27 017

Microsoft .NET Framework 3.5.1

• Microsoft Security Update for Microsoft .NET Framework 3.5.1 on Windows 7 and Windows Server 2008 R2
  http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=27 092


• Microsoft Security Update for Microsoft .NET Framework 3.5.1 on Windows 7 Service Pack 1 and Windows Server 20
  http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=27 101

Microsoft .NET Framework 'System.Net.Sockets' Namespace Security Bypass Vulnerability

References:

• Microsoft Homepage (Microsoft)
  
• ASA-2011-225 MS11-069 Vulnerability in .NET Framework Could Allow Information Di (Avaya)
  
• Microsoft Security Bulletin MS11-069 - Moderate Vulnerability in .NET Framework (Microsoft)