mfrserver on Node.js URL path traversal

Summaryinfo

A vulnerability marked as critical has been reported in mfrserver on Node.js. Impacted is an unknown function of the component URL Handler. This manipulation with the input ../ causes path traversal. The identification of this vulnerability is CVE-2017-16213. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical was found in mfrserver on Node.js (JavaScript Library) (the affected version is unknown). Affected by this vulnerability is an unknown code of the component URL Handler. The manipulation with the input value ../ leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, and integrity. The summary by CVE is:

mfrserver is a simple file server. mfrserver is vulnerable to a directory traversal issue, giving an attacker access to the filesystem by placing "../" in the url.

The bug was discovered 10/09/2017. The weakness was shared 06/07/2018 (Website). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2017-16213 since 10/29/2017. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 240 days. During that time the estimated underground price was around $0-$5k.

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

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• JavaScript Library

Name

• mfrserver

CPE 2.3info

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CPE 2.2info

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