f2e-server up to 1.12.11 on Node.js path traversal

Summaryinfo

A vulnerability categorized as critical has been discovered in f2e-server up to 1.12.11 on Node.js. This vulnerability affects unknown code. Executing a manipulation with the input ../ can lead to path traversal. The identification of this vulnerability is CVE-2017-16038. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in f2e-server up to 1.12.11 on Node.js (JavaScript Library). It has been declared as critical. This vulnerability affects an 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:

`f2e-server` 1.12.11 and earlier is vulnerable to a directory traversal issue, giving an attacker access to the filesystem by placing "../" in the url. This is compounded by `f2e-server` requiring elevated privileges to run.

The bug was discovered 06/28/2017. The weakness was shared 06/04/2018 (Website). The advisory is shared for download at github.com. This vulnerability was named CVE-2017-16038 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. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

The vulnerability was handled as a non-public zero-day exploit for at least 341 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.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• JavaScript Library

Name

• f2e-server

Version

• 1.12.0
• 1.12.1
• 1.12.2
• 1.12.3
• 1.12.4
• 1.12.5
• 1.12.6
• 1.12.7
• 1.12.8
• 1.12.9
• 1.12.10
• 1.12.11

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion