hostr up to 2.3.5 on Node.js GET Request path traversal

Summaryinfo

A vulnerability, which was classified as critical, was found in hostr up to 2.3.5 on Node.js. This affects an unknown function. Executing a manipulation with the input ../ as part of GET Request can lead to path traversal. This vulnerability appears as CVE-2017-16029. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in hostr up to 2.3.5 on Node.js (JavaScript Library). This vulnerability affects some unknown functionality. 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. CVE summarizes:

hostr is a simple web server that serves up the contents of the current directory. There is a directory traversal vulnerability in hostr 2.3.5 and earlier that allows an attacker to read files outside the current directory by sending `../` in the url path for GET requests.

The bug was discovered 04/15/2017. The weakness was presented 06/04/2018 (Website). The advisory is available at github.com. This vulnerability was named CVE-2017-16029 since 10/29/2017. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 415 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.

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Productinfo

Type

• JavaScript Library

Name

• hostr

Version

• 2.3.0
• 2.3.1
• 2.3.2
• 2.3.3
• 2.3.4
• 2.3.5

CPE 2.3info

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CPE 2.2info

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