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CVE
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CVE-2009-4445

Date: (C)2009-12-29   (M)2017-08-18
 
CVSS Score: 6.0Access Vector: NETWORK
Exploitability Subscore: 6.8Access Complexity: MEDIUM
Impact Subscore: 6.4Authentication: SINGLE_INSTANCE
 Confidentiality: PARTIAL
 Integrity: PARTIAL
 Availability: PARTIAL











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:
SECTRACK-1023387
http://soroush.secproject.com/downloadable/iis-semicolon-report.pdf
ms-iis-colon-security-bypass(55308)

CWE    1
CWE-20

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