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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2005-0065
Vulnerability in Remote Desktop Protocol RDP Could Lead to Denial of Service

Original Issue Date:July 18, 2005
Updated: August 10, 2005

Severity Rating: HIGH

Systems Affected

  • Microsoft Windows 2000 Service Pack 4
  • Microsoft Windows XP Service Pack 1
  • Microsoft Windows XP Service Pack 2
  • Microsoft Windows XP Professional x64 Edition
  • Microsoft Windows Server 2003
  • Microsoft Windows Server 2003 for Itanium-based Systems
  • Microsoft Windows Server 2003 Service Pack 1
  • Microsoft Windows Server 2003 with SP1 for Itanium-based Systems
  • Microsoft Windows Server 2003 x64 Edition

Overview

A denial of Service vulnerability has been reported in Microsoft Remote desktop protocol. This vulnerability could be exploited by malicious remote attacker to cause Denial of service attack.

Description

The Remote Desktop Protocol is used to create virtual sessions on users computer allowing remote access to their computer from other computer systems. The RDP protocol is implemented by Terminal services in Windows 2000, Windows Server 2003 and Remote Desktop Sharing services in Windows XP. A vulnerability exists due to improper handling of Remote Desktop requests.

 A remote attacker could exploit this vulnerability by sending a crafted malicious remote desktop sharing request to affected computer system making it unavailable to users, causing a denial of service attack. It has also been observed that exploit for this vulnerability is available on the Internet.

Workaround

  • Block TCP port 3389 at the Firewall.
  • Disable Terminal and Remote Desktop services if not required.
  • Secure Remote Desktop connections by using IPsec policy.
  • Secure Remote Desktop connection by employing a Virtual Private Network Connection

Solution

Apply the appropriate patches as mentioned in Microsoft Security Bulletin MS05-041

Vendor Information

Microsoft Corporation

http://www.microsoft.com/technet/security/advisory/904797.mspx
http://www.microsoft.com/technet/security/bulletin/MS05-041.mspx

References

Microsoft Security Bulletin
http://www.microsoft.com/technet/security/advisory/904797.mspx

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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