Microsoft Internet Information Services (IIS) 5.x and 6.x uses only the portion of a filename before a ; (semicolon) character to determine the file extension, which allows remote malicious users to bypass intended extension restrictions of third-party upload applications via a filename with a (1) .asp, (2) .cer, or (3) .asa first extension, followed by a semicolon and a safe extension, as demonstrated by the use of asp.dll to handle a .asp;.jpg file.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
microsoft internet information services 5.0 |
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microsoft internet information services 6.0 |
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