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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2009-0149
Microsoft Windows Internet Authentication Service Remote Code Execution Vulnerabilities

Original Issue Date:December 09, 2009

Severity Rating: HIGH

Systems Affected

  • Microsoft Windows 2000 SP 4
  • Microsoft Windows XP SP 2 and SP 3
  • Microsoft Windows XP Professional x64 Edition Service Pack 2
  • Microsoft Windows Server 2003 Service Pack 2
  • Microsoft Windows Server 2003 x64 Edition Service Pack 2
  • Microsoft Windows Server 2003 SP2 for Itanium based systems
  • Microsoft Windows Vista
  • Microsoft Windows Vista Service Pack 1
  • Microsoft Windows Vista x64 Edition
  • Microsoft Windows Vista x64 Edition Service Pack 1
  • Microsoft Windows Server 2008
  • Microsoft Windows Server 2008 for Itanium based systems

Overview

Two remote code execution vulnerabilities have been in reported Microsoft Windows Internet Authentication Service. Successful exploitation of any of these vulnerabilities could results in remote execution of arbitrary code.

Description

1. Internet Authentication Service Memory Corruption Vulnerability ( CVE-2009-2505   )

The vulnerability exists due to the error in handling malformed Protected Extensible Authentication Protocol PEAP authentication request by IAS.  A remote attacker could exploit this vulnerability by sending malformed PEAP authentication requests to IAS server, that will result in arbitrary code execution. 

2. MS-CHAP Authentication Bypass Vulnerability ( CVE-2009-3677   )

The vulnerability exists due to error in handling malformed MS-CHAP v2 authentication request. A remote attacker could exploit this vulnerability by sending malformed MS-CHAP v2 authentication requests to IAS server. 



Workaround

  • Use an authentication protocol other than PEAP with MS-CHAP v2 on your Internet Authentication Service server

For detailed steps and impact of applying these workarounds refer to Microsoft Security bulletin MS09- 071

Solution

Apply appropriate updates as mentioned in the Microsoft Security Bulletin MS09-071

Vendor Information

Microsoft
http://www.microsoft.com/technet/security/bulletin/ms09-071.mspx

References

Securityfocus
http://www.securityfocus.com/bid/37085

Secunia
http://secunia.com/advisories/37579/

VUPEN
http://www.vupen.com/english/advisories/2009/3435

SecurityTracker
http://securitytracker.com/alerts/2009/Dec/1023291.html

CVE Name
CVE-2009-2505
CVE-2009-3677

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-2436857

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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