Vulnerability CVE-2009-4445

Vulnerability Name:

CVE-2009-4445 (CCN-55308)

Assigned:

2009-12-23

Published:

2009-12-23

Updated:

2017-08-17

Summary:

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.

CVSS v3 Severity:

3.7 Low (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): High Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): Low Availibility (A): None

CVSS v2 Severity:

6.0 Medium (CVSS v2 Vector: AV:N/AC:M/Au:S/C:P/I:P/A:P)
4.8 Medium (Temporal CVSS v2 Vector: AV:N/AC:M/Au:S/C:P/I:P/A:P/E:U/RL:U/RC:UR)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

2.6 Low (CCN CVSS v2 Vector: AV:N/AC:H/Au:N/C:N/I:P/A:N)
2.1 Low (CCN Temporal CVSS v2 Vector: AV:N/AC:H/Au:N/C:N/I:P/A:N/E:U/RL:U/RC:UR)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): High Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): Partial Availibility (A): None