CVE-2009-4445 Information

Description

Microsoft Internet Information Services (IIS) when used in conjunction with unspecified third-party upload applications allows remote attackers to create empty files with arbitrary extensions via a filename containing an initial extension followed by a : (colon) and a safe extension as demonstrated by an upload of a .asp:.jpg file that results in creation of an empty .asp file related to support for the NTFS Alternate Data Streams (ADS) filename syntax. NOTE: it could be argued that this is a vulnerability in the third-party product not IIS because the third-party product should be applying its extension restrictions to the portion of the filename before the colon.

Reference

http://securitytracker.com/id?1023387 http://soroush.secproject.com/downloadable/iis-semicolon-report.pdf https://exchange.xforce.ibmcloud.com/vulnerabilities/55308