CVE-2009-4444

published 2009-12-29

CVE-2009-4444: 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…

medium 6 CVSS 3.1

AV N AC M Au S C P I P A P

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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
microsoft	internet_information_services	—	—
microsoft	internet_information_services	—	—