Title: Microsoft IIS False Content-Length Field DoS Vulnerability
Severity: MODERATE
Description:
Microsoft IIS 5.0 may be prone to a denial of service condition when sent a specially crafted malformed HTTP GET header.
If an IIS 5.0 web server is sent a crafted HTTP GET request which contains a falsified and excessive "Content-Length" field, it behaves in an unusual manner. The server keeps the connection open and does not time out, but does not respond otherwise. It is possible that this may be used to cause a denial of service to the web server.
If this unexpected behavior can somehow be exploited to cause a denial of service, then the server will need to be restarted to regain normal functionality.
Affected Products:
- Microsoft IIS 5.0
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Professional
- Microsoft Windows 2000 Server
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