[NT] Microsoft ISA Server 2000 DoS

Type securityvulns
Reporter Securityvulns
Modified 2005-06-02T00:00:00


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Microsoft ISA Server 2000 DoS


" <http://www.microsoft.com/isaserver/default.mspx> Microsoft Internet Security and Acceleration (ISA) Server is the advanced stateful packet and application-layer inspection firewall, virtual private network (VPN), and Web cache solution that enables enterprise customers to easily maximize existing information technology (IT) investments by improving network security and performance."

Microsoft Internet Security and Acceleration Server's Firewall crashes when heavy network traffic is received from a SecureNAT client.


Vulnerable Systems: * SA Server 2000 and ISA Server 2000 Service Pack 2 (SP2) Wspsrv.exe version 3.0.1200.411 and prior

Workaround: Limit the size of traffic being handled by the ISA server for each SecureNAT client contacting it.

Disclosure Timeline: 01-06-2005 - Vulnerability researched 02-06-2005 - Security companies and several CERT units contacted, advisory published, link to advisory sent to security companies and several CERT units


The information has been provided by <mailto:juha-matti.laurio@netti.fi> Juha-Matti Laurio . The original article can be found at:
<http://www.networksecurity.fi/advisories/windows-isa-firewall.html> http://www.networksecurity.fi/advisories/windows-isa-firewall.html The vendor advisory can be found at :
<http://support.microsoft.com/kb/894864/EN-US/> http://support.microsoft.com/kb/894864/EN-US/


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