Vulnerability Details : CVE-2009-4445
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.
Vulnerability category: Input validation
Exploit prediction scoring system (EPSS) score for CVE-2009-4445
Probability of exploitation activity in the next 30 days: 0.44%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 71 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2009-4445
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
---|---|---|---|---|---|
6.0
|
MEDIUM | AV:N/AC:M/Au:S/C:P/I:P/A:P |
6.8
|
6.4
|
[email protected] |
CWE ids for CVE-2009-4445
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The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: [email protected] (Primary)
References for CVE-2009-4445
-
http://soroush.secproject.com/downloadable/iis-semicolon-report.pdf
Third Party Advisory
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https://exchange.xforce.ibmcloud.com/vulnerabilities/55308
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http://securitytracker.com/id?1023387
Third Party Advisory;VDB Entry
Products affected by CVE-2009-4445
- cpe:2.3:a:microsoft:internet_information_services:*:*:*:*:*:*:*:*