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CVE-2009-4444

Disclosure Date: December 29, 2009
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Description

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 attackers 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.

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CVSS V3 Severity and Metrics
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Impact Score:
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Exploitability Score:
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User Interaction (UI):
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Integrity (I):
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General Information

Technical Analysis