Microsoft Windows Vista/7/8.1 NtfsCommonCreate c:\$MFT\ denial of service

Summaryinfo

A vulnerability described as critical has been identified in Microsoft Windows Vista/7/8.1. This issue affects the function NtfsCommonCreate. The manipulation of the argument c:\$MFT\ results in denial of service. It is possible to launch the attack remotely. Furthermore, an exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Microsoft Windows Vista/7/8.1 (Operating System). Affected is the function NtfsCommonCreate. The manipulation of the argument c:\$MFT\ with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability.

The weakness was published 05/22/2017 by anatolymik as A bug in NTFS, or hang the entire system as not defined blog post (Website). The advisory is shared for download at habrahabr.ru. The public release happened without coordination with the vendor. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1499.

A public exploit has been developed by anatolymik in HTML and been published immediately after the advisory. The exploit is shared for download at habrahabr.ru. It is declared as highly functional. As 0-day the estimated underground price was around $5k-$25k. The code used by the exploit is:

<img src="file:///c:/$MFT/XYZ"></img>

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityTracker (ID 1038575†). Similar entries are available at VDB-101817 and VDB-101816. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

Version

• 7
• 8.1
• Vista

License

• commercial

Support

• end of life (old version)

Website

• Vendor: https://www.microsoft.com/
• Product: https://www.microsoft.com/en-us/windows

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Once again VulDB remains the best source for vulnerability data.

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