Vulnerability Scan Result

Target:

http://ns2.arkongroup.us/

Scanned target: http://ns2.arkongroup.us/

Submitted: May 22, 2025 from AM

Public Scan

Scan mode: Passive (non-intrusive)

Summary

medium

Info

Low

Medium

High

Critical

Screenshot

Title:	Web Server's Default Page
Description:	No description found

IP Information

IP address	116.202.221.250
Country	DE
AS number	AS24940
Net name	Hetzner Online GMBH

Open Ports

21/tcp	ftp	ProFTPD -
22/tcp	ssh	OpenSSH 8.9p1 Ubuntu 3ubuntu0.13
25/tcp	smtp	Postfix smtpd -
53/tcp	domain	- -
80/tcp	http	nginx -
106/tcp	tcpwrapped	- -
110/tcp	pop3	Dovecot pop3d -
143/tcp	imap	Dovecot imapd -
443/tcp	https	nginx -
465/tcp	smtp	Postfix smtpd -
993/tcp	imap	Dovecot imapd -
995/tcp	pop3	Dovecot pop3d -
8443/tcp	https	sw-cp-server -

Web Technologies

Software / Version	Category
Nginx	Web servers, Reverse proxies

Web Application Vulnerabilities

Evidence

URL	Response URL	Evidence
http://ns2.arkongroup.us/	http://ns2.arkongroup.us/	Communication is made over unsecure, unencrypted HTTP.

Vulnerability description

We noticed that the communication between the web browser and the server is done using the HTTP protocol, which transmits data unencrypted over the network.

Risk description

The risk is that an attacker who manages to intercept the communication at the network level can read and modify the data transmitted (including passwords, secret tokens, credit card information and other sensitive data).

Recommendation

We recommend you to reconfigure the web server to use HTTPS - which encrypts the communication between the web browser and the server.

Classification

CWE	CWE-311
OWASP Top 10 - 2017	A3 - Sensitive Data Exposure
OWASP Top 10 - 2021	A4 - Insecure Design

Evidence

URL	Evidence
http://ns2.arkongroup.us/	Response headers do not include the X-Content-Type-Options HTTP security header

Vulnerability description

We noticed that the target application's server responses lack the X-Content-Type-Options header. This header is particularly important for preventing Internet Explorer from reinterpreting the content of a web page (MIME-sniffing) and thus overriding the value of the Content-Type header.

Risk description

The risk is that lack of this header could make possible attacks such as Cross-Site Scripting or phishing in Internet Explorer browsers.

Recommendation

We recommend setting the X-Content-Type-Options header such as `X-Content-Type-Options: nosniff`.

Classification

CWE	CWE-693
OWASP Top 10 - 2017	A6 - Security Misconfiguration
OWASP Top 10 - 2021	A5 - Security Misconfiguration

Evidence

URL	Evidence
http://ns2.arkongroup.us/	Response does not include the HTTP Content-Security-Policy security header or meta tag

Vulnerability description

We noticed that the target application lacks the Content-Security-Policy (CSP) header in its HTTP responses. The CSP header is a security measure that instructs web browsers to enforce specific security rules, effectively preventing the exploitation of Cross-Site Scripting (XSS) vulnerabilities.

Risk description

The risk is that if the target application is vulnerable to XSS, lack of this header makes it easily exploitable by attackers.

Recommendation

Configure the Content-Security-Header to be sent with each HTTP response in order to apply the specific policies needed by the application.

Classification

CWE	CWE-693
OWASP Top 10 - 2017	A6 - Security Misconfiguration
OWASP Top 10 - 2021	A5 - Security Misconfiguration

Evidence

URL	Evidence
http://ns2.arkongroup.us/	Response headers do not include the Referrer-Policy HTTP security header as well as the `<meta/>` tag with name 'referrer' is not present in the response.

Vulnerability description

We noticed that the target application's server responses lack the Referrer-Policy HTTP header, which controls how much referrer information the browser will send with each request originated from the current web application.

Risk description

The risk is that if a user visits a web page (e.g. "http://example.com/pricing/") and clicks on a link from that page going to e.g. "https://www.google.com", the browser will send to Google the full originating URL in the `Referer` header, assuming the Referrer-Policy header is not set. The originating URL could be considered sensitive information and it could be used for user tracking.

Recommendation

The Referrer-Policy header should be configured on the server side to avoid user tracking and inadvertent information leakage. The value `no-referrer` of this header instructs the browser to omit the Referer header entirely.

Classification

CWE	CWE-693
OWASP Top 10 - 2017	A6 - Security Misconfiguration
OWASP Top 10 - 2021	A5 - Security Misconfiguration

Evidence

Software / Version	Category
Nginx	Web servers, Reverse proxies

Vulnerability description

We noticed that server software and technology details are exposed, potentially aiding attackers in tailoring specific exploits against identified systems and versions.

Risk description

The risk is that an attacker could use this information to mount specific attacks against the identified software type and version.

Recommendation

We recommend you to eliminate the information which permits the identification of software platform, technology, server and operating system: HTTP server headers, HTML meta information, etc.

Classification

OWASP Top 10 - 2017	A6 - Security Misconfiguration
OWASP Top 10 - 2021	A5 - Security Misconfiguration

Evidence

URL
Missing: http://ns2.arkongroup.us/.well-known/security.txt

Vulnerability description

We have noticed that the server is missing the security.txt file, which is considered a good practice for web security. It provides a standardized way for security researchers and the public to report security vulnerabilities or concerns by outlining the preferred method of contact and reporting procedures.

Risk description

There is no particular risk in not having a security.txt file for your server. However, this file is important because it offers a designated channel for reporting vulnerabilities and security issues.

Recommendation

We recommend you to implement the security.txt file according to the standard, in order to allow researchers or users report any security issues they find, improving the defensive mechanisms of your server.

Classification

OWASP Top 10 - 2017	A6 - Security Misconfiguration
OWASP Top 10 - 2021	A5 - Security Misconfiguration

Evidence

URL	Method	Summary
http://ns2.arkongroup.us/	OPTIONS	We did a HTTP OPTIONS request. The server responded with a 200 status code and the header: `Allow: GET,POST,OPTIONS,HEAD` Request / Response

Vulnerability description

We have noticed that the webserver responded with an Allow HTTP header when an OPTIONS HTTP request was sent. This method responds to requests by providing information about the methods available for the target resource.

Risk description

The only risk this might present nowadays is revealing debug HTTP methods that can be used on the server. This can present a danger if any of those methods can lead to sensitive information, like authentication information, secret keys.

Recommendation

We recommend that you check for unused HTTP methods or even better, disable the OPTIONS method. This can be done using your webserver configuration.

Classification

CWE	CWE-16
OWASP Top 10 - 2017	A6 - Security Misconfiguration
OWASP Top 10 - 2021	A5 - Security Misconfiguration

Infrastructure Vulnerabilities

Evidence

We managed to detect a publicly accessible SSH service.

Starting Nmap ( https://nmap.org ) at 2025-05-22 17:53 EEST
Nmap scan report for ns2.arkongroup.us (116.202.221.250)
Host is up (0.024s latency).
rDNS record for 116.202.221.250: blissful-wozniak.116-202-221-250.plesk.page

PORT   STATE SERVICE VERSION
22/tcp open  ssh     OpenSSH 8.9p1 Ubuntu 3ubuntu0.13 (Ubuntu Linux; protocol 2.0)
| ssh-auth-methods: 
|   Supported authentication methods: 
|     publickey
|_    password
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 0.90 seconds

Vulnerability description

We found that the SSH service with username/password authentication is publicly accessible. Network administrators often use remote administration protocols to control devices like switches, routers, and other essential systems. However, allowing these services to be accessible via the Internet can increase security risks, creating potential opportunities for attacks on the organization.

Risk description

Exposing this service online with username/password authentication can enable attackers to launch authentication attacks, like guessing login credentials, and potentially gaining unauthorized access. Vulnerabilities, such as unpatched software, protocol flaws, or backdoors could also be exploited. An example is the CVE-2024-3094 (XZ Utils Backdoor) vulnerability.

Recommendation

We recommend turning off SSH with username/password authentication access over the Internet and instead using a Virtual Private Network (VPN) that mandates two-factor authentication (2FA). If the SSH service is essential for business purposes, we recommend limiting access only from designated IP addresses using a firewall. Furthermore, it is advisable to utilize SSH Public Key Authentication since it employs a key pair to verify the identity of a user or process.

Evidence

We managed to detect a publicly accessible File Transfer Protocol (FTP) service.

PORT STATE SERVICE VERSION
21/tcp open ftp ProFTPD

Vulnerability description

We found that the File Transfer Protocol (FTP) service is publicly accessible. The FTP enables client systems to connect to upload and download files. Nonetheless, FTP lacks encryption for the data exchanged between the server and the client, leaving all transferred data exposed in plaintext.

Risk description

Exposing this service online can enable attackers to execute man-in-the-middle attacks, capturing sensitive user credentials and the contents of files because FTP operates without encryption. The entirety of the communication between the client and the server remains unsecured in plaintext. This acquired information could further facilitate additional attacks within the network.

Recommendation

We recommend turning off FTP access over the Internet and instead using a Virtual Private Network (VPN) that mandates two-factor authentication (2FA). If the FTP service is essential for business purposes, we recommend limiting access only from designated IP addresses using a firewall. Furthermore, utilizing SFTP (Secure File Transfer Protocol) is recommended as this protocol employs encryption to secure data transfers.

Evidence

We managed to detect a publicly accessible Post Office Protocol (POP3) service.

Starting Nmap ( https://nmap.org ) at 2025-05-22 17:53 EEST
Nmap scan report for ns2.arkongroup.us (116.202.221.250)
Host is up (0.026s latency).
rDNS record for 116.202.221.250: blissful-wozniak.116-202-221-250.plesk.page

PORT    STATE SERVICE  VERSION
995/tcp open  ssl/pop3 Dovecot pop3d
|_pop3-capabilities: CAPA APOP PIPELINING TOP USER RESP-CODES AUTH-RESP-CODE SASL(PLAIN LOGIN DIGEST-MD5 CRAM-MD5) UIDL

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 6.80 seconds

Vulnerability description

We found that the Post Office Protocol (POP3) service is publicly accessible and doesn’t include STARTTLS capability. Email clients use the Post Office Protocol (POP) to download emails for user accounts. Some POP servers are initially set up to operate over an unsecured protocol. When email clients download email content through this plaintext protocol, it can pose a substantial risk to the organization's network, especially depending on which user account is set to receive the emails.

Risk description

Exposing this service online can enable attackers to conduct man-in-the-middle attacks, thereby gaining access to sensitive user credentials and the contents of emails. Given that POP3 operates via a plaintext protocol, the entirety of the data exchanged between the client and server is left unencrypted. This critical information could then be leveraged in further attacks on the organization's network.

Recommendation

We recommend turning off POP3 access over the Internet and instead using a Virtual Private Network (VPN) that mandates two-factor authentication (2FA). If the POP3 service is essential for business purposes, we recommend limiting access only from designated IP addresses using a firewall. Furthermore, activating STARTTLS capability (switching the connection to a secure communication) or utilizing Secure POP3 (POP3S) is recommended, as this protocol employs encryption.

Evidence

Domain Queried	DNS Record Type	Description	Value
ns2.arkongroup.us	A	IPv4 address	116.202.221.250

Risk description

An initial step for an attacker aiming to learn about an organization involves conducting searches on its domain names to uncover DNS records associated with the organization. This strategy aims to amass comprehensive insights into the target domain, enabling the attacker to outline the organization's external digital landscape. This gathered intelligence may subsequently serve as a foundation for launching attacks, including those based on social engineering techniques. DNS records pointing to services or servers that are no longer in use can provide an attacker with an easy entry point into the network.

Recommendation

We recommend reviewing all DNS records associated with the domain and identifying and removing unused or obsolete records.

Operating System	Accuracy
Linux 5.0 - 5.4	100%

Evidence

Software / Version	Category
Nginx	Web servers, Reverse proxies

Vulnerability description

We noticed that server software and technology details are exposed, potentially aiding attackers in tailoring specific exploits against identified systems and versions.

Risk description

The risk is that an attacker could use this information to mount specific attacks against the identified software type and version.

Recommendation

We recommend you to eliminate the information which permits the identification of software platform, technology, server and operating system: HTTP server headers, HTML meta information, etc.

Evidence

Software / Version	Category
Plesk	Hosting panels
Sentry	Issue trackers
Nginx	Web servers, Reverse proxies
RequireJS	JavaScript frameworks
Prototype	JavaScript frameworks
React	JavaScript frameworks
React Router 6	JavaScript frameworks
core-js 3.38.1	JavaScript libraries

Vulnerability description

We noticed that server software and technology details are exposed, potentially aiding attackers in tailoring specific exploits against identified systems and versions.

Risk description

The risk is that an attacker could use this information to mount specific attacks against the identified software type and version.

Recommendation

We recommend you to eliminate the information which permits the identification of software platform, technology, server and operating system: HTTP server headers, HTML meta information, etc.

Evidence

Software / Version	Category
Plesk	Hosting panels
Sentry	Issue trackers
Nginx	Web servers, Reverse proxies
RequireJS	JavaScript frameworks
Prototype	JavaScript frameworks
React	JavaScript frameworks
React Router 6	JavaScript frameworks
core-js 3.38.1	JavaScript libraries

Vulnerability description

We noticed that server software and technology details are exposed, potentially aiding attackers in tailoring specific exploits against identified systems and versions.

Risk description

The risk is that an attacker could use this information to mount specific attacks against the identified software type and version.

Recommendation

We recommend you to eliminate the information which permits the identification of software platform, technology, server and operating system: HTTP server headers, HTML meta information, etc.