Microsoft IIS 4.0/5.0 Escaped Characters Vulnerability

Bugtraq ID:	1101
Class:	Failure to Handle Exceptional Conditions
CVE:
Remote:	Yes
Local:	Yes
Published:	Apr 12 2000 12:00AM
Updated:	Apr 12 2000 12:00AM
Credit:	Discovered by Vanja Hrustic and publicized in Microsoft Security Bulletin (MS00-023) on April 12, 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 alpha - Microsoft Windows NT 4.0 alpha - Microsoft Windows NT 4.0 alpha 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 4.0/5.0 Escaped Characters Vulnerability

Requesting a malformed URL containing numerous escaped characters will cause Microsoft IIS performance to dramatically decrease until the URL has been processed.

Microsoft IIS 4.0/5.0 Escaped Characters Vulnerability

Currently the SecurityFocus staff are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected].

Microsoft IIS 4.0/5.0 Escaped Characters Vulnerability

References:

• Frequently Asked Questions: Microsoft Security Bulletin (MS00-023) (Microsoft)
  
• Q254142: 100% CPU Usage Occurs When You Send a Large Escape Sequence (Microsoft)