CVE-2009-4445

medium Microsoft
CVSS v3 Base Score
6.0
AV:N/AC:M/Au:S/C:P/I:P/A:P
EPSS Score
10.1%
Exploitation probability in 30 days
Top 7% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
M
Confidentiality
P
Integrity
P
Availability
P
Published: December 29, 2009 (5980 days ago)
Last Modified: April 23, 2026
Vendor: Microsoft
Source: NVD

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.

CWE

CWE-20

Affected Products

microsoft internet information services

References

🔗 securitytracker.com 🔗 soroush.secproject.com 🔗 exchange.xforce.ibmcloud.com 🔗 securitytracker.com 🔗 soroush.secproject.com