CVEvulnerability

CVE-2009-4445

6.0 MEDIUM Published 2009-12-29 Modified 2026-06-16 Official page ↗
Status
Modified
Published
2009-12-29
Last modified
2026-06-16
Assigner
[email protected]
CVSS 2.0 ([email protected])
6.0 MEDIUM — AV:N/AC:M/Au:S/C:P/I:P/A:P
Weaknesses
CWE-20

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.

Affected configurations

• microsoft internet information services (<= 6.0)

Related

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References