Title: Microsoft IIS 4.0/5.0 Source Fragment Disclosure Vulnerability
Severity: MODERATE
Description:
Microsoft IIS 4.0 and 5.0 can be made to disclose fragments of source code which should otherwise be inaccessible. This is done by appending "+.htr" to a request for a known .asp (or .asa, .ini, etc) file. Appending this string causes the request to be handled by ISM.DLL, which then strips the +.htr string and may disclose part or all of the source of the .asp file specified in the request. There has been a report that source will be displayed up to the first '<%' encountered - '<%' and '%>' are server-side script delimiters. Pages which use the <script runat=server></script> delimiters instead will display the entire source, or up to any '<%' in the page. This vulnerability is a variant of a previously discovered vulnerability, BugTraq ID 1193.
Affected Products:
- Cisco Building Broadband Service Manager 5.0.0
- Cisco Call Manager 1.0.0
- Cisco Call Manager 2.0.0
- Cisco Call Manager 3.0.0
- Cisco ICS 7750 0.0.0
- Cisco IP/VC 3540 Video Rate Matching Module 0.0.0
- Cisco Unity Server 2.0.0
- Cisco Unity Server 2.2.0
- Cisco Unity Server 2.3.0
- Cisco Unity Server 2.4.0
- Cisco uOne 1.0.0
- Cisco uOne 2.0.0
- Cisco uOne 3.0.0
- Cisco uOne 4.0.0
- Microsoft BackOffice 4.0.0
- Microsoft BackOffice 4.5.0
- Microsoft IIS 4.0.0
- Microsoft IIS 4.0.0alpha
- Microsoft IIS 5.0
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Professional
- Microsoft Windows 2000 Server
- Microsoft Windows NT 4.0 Option Pack
References:
- Microsoft: Microsoft Security Bulletin (MS00-044): Frequently Asked Questions
- SecurityFocus: Microsoft IIS 4.0/5.0 Malformed Filename Request Vulnerability
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