Microsoft IIS Front Page Server Extension DoS Vulnerability

Bugtraq ID:	2144
Class:	Failure to Handle Exceptional Conditions
CVE:
Remote:	Yes
Local:	Yes
Published:	Dec 22 2000 12:00AM
Updated:	Dec 22 2000 12:00AM
Credit:	Discovered by eEye Digital Security <http://www.eEye.com> and posted in a Microsoft Security Bulletin (MS00-100) on Dec 22, 2000.
Vulnerable:	Microsoft IIS 5.0 - Microsoft Windows 2000 Advanced Server SP2 - Microsoft Windows 2000 Advanced Server SP2 - Microsoft Windows 2000 Advanced Server SP1 - Microsoft Windows 2000 Advanced Server SP1 + Microsoft Windows 2000 Advanced Server + Microsoft Windows 2000 Advanced Server - Microsoft Windows 2000 Datacenter Server SP2 - Microsoft Windows 2000 Datacenter Server SP2 - Microsoft Windows 2000 Datacenter Server SP1 - Microsoft Windows 2000 Datacenter Server SP1 - Microsoft Windows 2000 Professional SP2 - Microsoft Windows 2000 Professional SP2 - Microsoft Windows 2000 Professional SP1 - Microsoft Windows 2000 Professional SP1 + Microsoft Windows 2000 Professional + Microsoft Windows 2000 Professional - Microsoft Windows 2000 Server SP2 - Microsoft Windows 2000 Server SP2 - Microsoft Windows 2000 Server SP1 - Microsoft Windows 2000 Server SP1 + Microsoft Windows 2000 Server + Microsoft Windows 2000 Server Microsoft IIS 4.0 + Cisco Building Broadband Service Manager (BBSM) 5.0 + Cisco Building Broadband Service Manager (BBSM) 5.0 + Cisco Call Manager 3.0 + Cisco Call Manager 3.0 + Cisco Call Manager 2.0 + Cisco Call Manager 2.0 + Cisco Call Manager 1.0 + Cisco Call Manager 1.0 + Cisco ICS 7750 + Cisco ICS 7750 + Cisco IP/VC 3540 Video Rate Matching Module + Cisco IP/VC 3540 Video Rate Matching Module + Cisco Unity Server 2.4 + Cisco Unity Server 2.4 + Cisco Unity Server 2.3 + Cisco Unity Server 2.3 + Cisco Unity Server 2.2 + Cisco Unity Server 2.2 + Cisco Unity Server 2.0 + Cisco Unity Server 2.0 + Cisco uOne 4.0 + Cisco uOne 4.0 + Cisco uOne 3.0 + Cisco uOne 3.0 + Cisco uOne 2.0 + Cisco uOne 2.0 + Cisco uOne 1.0 + Cisco uOne 1.0 + Hancom Hancom Office 2007 0 + Hancom Hancom Office 2007 0 + Microsoft BackOffice 4.5 + Microsoft BackOffice 4.5 + Microsoft Windows NT 4.0 Option Pack + Microsoft Windows NT 4.0 Option Pack
Not Vulnerable:

Microsoft IIS Front Page Server Extension DoS Vulnerability

Microsoft IIS ships with Front Page Server Extensions (FPSE) which enables administrators remote and local web page and content management. Browse - time support is another feature within FPSE which provides users with functional web applications.

Due to the way FPSE handles the processing of web forms, IIS is subject to a denial of service. By supplying malformed data to one of the FPSE functions IIS will stop responding. A restart of the service is required in order to gain normal functionality.

It should be noted that the victim only requires to have FPSE installed on the web server to be vulnerable.

Microsoft IIS Front Page Server Extension DoS Vulnerability

Solution:
Microsoft has released a patch which addresses this issue:


Microsoft IIS 4.0

• Microsoft Q280322
  http://download.microsoft.com/download/winntsrv40/Patch/q280322/NT4/EN -US/Q280322i.EXE

Microsoft IIS 5.0

• Microsoft Q280322
  http://download.microsoft.com/download/win2000platform/Patch/q280322/N T5/EN-US/Q280322_W2K_SP2_x86_en.EXE

Microsoft IIS Front Page Server Extension DoS Vulnerability

References:

• Microsoft Security Bulletin (MS00-100) (Microsoft)
  
• Microsoft Security Bulletin (MS00-100): Frequently Asked Questions (Microsoft)