Title: Microsoft IIS Virtual Directory Naming Vulnerability
Severity: MODERATE
Description:
Server side processing of web pages can be bypassed under a specific set of conditions. If an .asp or similar file resides in a virtual directory whose name ends in a legal extension, the source code of the file may be sent to the client browser.
IIS determines what action to take on a web document by parsing the URL for the filename extension. The first registered extension found in the string is used to make this decision. Therefore, if a request is made for the following file: /webroot/docs.htm/some.asp, and that file exists, IIS will parse the path and find the .htm extension in the virtual directory name docs.htm, determine that no preprocessing is required, and send the unprocessed source of the some.asp file.
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 Site Server Commerce Edition 3.0.0 alpha
- Microsoft Site Server Commerce Edition 3.0.0 i386
- Microsoft Windows NT 4.0 Option Pack
References:
- Microsoft: Microsoft Security Bulletin MS99-058: Frequently Asked Questions
- Microsoft: Q186803: Browsing Folders with Script-Mapped Extensions Returns Errors
- Microsoft: Q238606: Page Contents Visible When Certain Dot Extensions Present in the Virtua
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