CVE-2009-4445 File upload in n/a

Medium 6.0 Published Updated

Remote attackers can upload malicious files with arbitrary extensions via NTFS Alternate Data Streams syntax, potentially leading to code execution.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Over the internet
Victim action needed
Not needed
Fix
None listed

What is CVE-2009-4445?

CVE-2009-4445 is a medium-severity vulnerability in Microsoft Internet Information Services, published on 29 Dec 2009. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-20

Which versions are affected by CVE-2009-4445?

It affects 1 product.

Products include Microsoft Internet Information Services.

How do I fix CVE-2009-4445?

No fix has been published for CVE-2009-4445 yet. Limit exposure of the affected software until one is available.

Is CVE-2009-4445 being exploited?

There is no known exploitation of CVE-2009-4445 in the wild and no public exploit code.

All Microsoft Internet Information Services vulnerabilities

Sources

Also known as GHSA-vgvh-f7c3-rv4v.

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