Vulnerability Scan Result
| Title: | Hostnet: De grootste domeinnaam- en hostingprovider van Nederland. |
| Description: | Domeinnaam registreren bij Hostnet: MAKKELIJK - SNEL - VOORDELIG |
| ip_address | 91.184.0.97 |
| country | DK  |
| network_name | One.com A/S |
| asn | AS51468 |
21/tcp | ftp | ProFTPD - |
80/tcp | http | Apache httpd - |
443/tcp | https | - - |
| Software / Version | Category |
|---|---|
| Google Font API | Font scripts |
| Apache HTTP Server | Web servers |
| jQuery 3.6.0 | JavaScript libraries |
| Sectigo | SSL/TLS certificate authorities |
| PWA | Miscellaneous |
| Google Tag Manager | Tag managers |
Web Application Vulnerabilities
Evidence
Vulnerability description
We found that the target application's web server presents an SSL/TLS certificate that is not trusted by web browsers. This issue typically arises when the server uses a self-signed certificate, a certificate from an untrusted authority, or a certificate that has expired or is invalid for other reasons. The lack of a trusted certificate makes it challenging for users to verify the authenticity of the server, undermining the security of the SSL/TLS connection.
Risk description
The risk is that an attacker could easily mount a man-in-the-middle attack in order to sniff the SSL communication by presenting the user a fake SSL certificate.
Recommendation
We recommend you to configure a trusted SSL certificate for the web server. Examples of how to configure SSL for various servers for Apache and Nginx are referenced.
Classification
| CWE | CWE-295 |
| OWASP Top 10 - 2017 | |
| OWASP Top 10 - 2021 |
Evidence
| URL | Evidence |
|---|---|
| https://serviceprofitimprovement.nl/ | Response headers do not include the HTTP Strict-Transport-Security header |
Vulnerability description
We noticed that the target application lacks the HTTP Strict-Transport-Security header in its responses. This security header is crucial as it instructs browsers to only establish secure (HTTPS) connections with the web server and reject any HTTP connections.
Risk description
The risk is that lack of this header permits an attacker to force a victim user to initiate a clear-text HTTP connection to the server, thus opening the possibility to eavesdrop on the network traffic and extract sensitive information (e.g. session cookies).
Recommendation
The Strict-Transport-Security HTTP header should be sent with each HTTPS response. The syntax is as follows: `Strict-Transport-Security: max-age=<seconds>[; includeSubDomains]` The parameter `max-age` gives the time frame for requirement of HTTPS in seconds and should be chosen quite high, e.g. several months. A value below 7776000 is considered as too low by this scanner check. The flag `includeSubDomains` defines that the policy applies also for sub domains of the sender of the response.
Classification
| CWE | CWE-693 |
| OWASP Top 10 - 2017 | |
| OWASP Top 10 - 2021 |
Evidence
| URL | Evidence |
|---|---|
| https://serviceprofitimprovement.nl/ | 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-1021 |
| OWASP Top 10 - 2017 | |
| OWASP Top 10 - 2021 |
Evidence
| Software / Version | Category |
|---|---|
| Google Font API | Font scripts |
| Apache HTTP Server | Web servers |
| jQuery 3.6.0 | JavaScript libraries |
| Sectigo | SSL/TLS certificate authorities |
| PWA | Miscellaneous |
| Google Tag Manager | Tag managers |
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
| CWE | CWE-200 |
| OWASP Top 10 - 2017 | |
| OWASP Top 10 - 2021 |
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
| CWE | CWE-1188 |
| OWASP Top 10 - 2017 | |
| OWASP Top 10 - 2021 |
Infrastructure Vulnerabilities
Evidence
| Domain Queried | DNS Record Type | Description | Value |
|---|---|---|---|
| _dmarc.serviceprofitimprovement.nl | TXT | Text record | "v=DMARC1; p=none" |
Vulnerability description
We found that the DMARC record for the domain is not configured with rua tag. When a DMARC record is not configured with the rua (Reporting URI for Aggregate Reports) tag, the domain owner misses out on critical feedback regarding the domain's email authentication performance. Aggregate reports are essential for monitoring how a domain's DMARC policy is applied across various mail servers and whether legitimate or malicious emails are being sent on behalf of the domain. Without this reporting, domain administrators have no visibility into how their DMARC policy is being enforced, which hinders their ability to detect potential spoofing or authentication issues.
Risk description
The absence of rua reporting creates a significant blind spot in the domain's email security posture. Without aggregate reports, domain administrators cannot track DMARC compliance across email sent from their domain, leaving them unaware of potential misconfigurations or unauthorized use of their domain for malicious purposes, such as phishing or spoofing. This lack of visibility increases the risk of undetected spoofing attempts, which could damage the domain's reputation and lead to financial, operational, or reputational harm. Moreover, legitimate email issues, such as misaligned SPF or DKIM configurations, may also go unnoticed, affecting email deliverability.
Recommendation
We recommend configuring the rua tag in the DMARC record to receive aggregate reports from mail servers. This tag should point to a reliable email address or monitoring service capable of handling DMARC aggregate reports, such as rua=mailto:dmarc-reports@example.com. These reports provide valuable insights into how email from the domain is being treated by receiving mail servers, highlighting potential authentication issues and attempts to spoof the domain. Regularly reviewing these reports will help ensure the DMARC policy is properly enforced and that any email authentication failures are addressed in a timely manner.
Evidence
We found insecure DNS cookie usage on the following nameservers: ns01.hostnet.nl, ns02.hostnet.nl
Vulnerability description
We found that the server does not implement DNS Cookies or uses them insecurely. DNS Cookies help prevent DNS-based attacks, such as spoofing and amplification attacks.
Risk description
The risk exists because without DNS Cookies, the server is vulnerable to DNS spoofing and amplification attacks. Attackers can manipulate responses or use the server in distributed denial-of-service (DDoS) attacks, compromising network availability and security.
Recommendation
We recommend enabling DNS Cookies to prevent spoofed DNS responses. Ensure proper cookie validation is implemented to mitigate DNS amplification attacks. Regularly update DNS servers to support the latest DNS security features.
Evidence
| Domain Queried | DNS Record Type | Description | Value |
|---|---|---|---|
| _dmarc.serviceprofitimprovement.nl | TXT | Text record | "v=DMARC1; p=none" |
Vulnerability description
We found that the target uses p=none in the DMARC policy. The DMARC policy set to p=none means that the domain owner is not taking any action on emails that fail DMARC validation. This configuration effectively disables enforcement, allowing potentially spoofed or fraudulent emails to be delivered without any additional scrutiny.
Risk description
Emails that fail DMARC checks are still delivered to recipients. This leaves the domain highly vulnerable to email spoofing and phishing attacks, as malicious actors can impersonate the domain without facing any consequences from DMARC enforcement.
Recommendation
We recommend changing the DMARC policy to p=quarantine or, ideally, p=reject to actively block or quarantine emails that fail DMARC validation. This will enhance the security of your domain against spoofing and phishing attacks by ensuring that only legitimate emails are delivered.
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
| Domain Queried | DNS Record Type | Description | Value |
|---|---|---|---|
| _dmarc.serviceprofitimprovement.nl | TXT | Text record | "v=DMARC1; p=none" |
Vulnerability description
We found that the DMARC record for the domain is not configured with sp policy, meaning that no policy is enforced for subdomains. When a DMARC record does not include a subdomain policy (sp directive), subdomains are not explicitly covered by the main domain's DMARC policy. This means that emails sent from subdomains (e.g., sub.example.com) may not be subject to the same DMARC enforcement as the main domain (example.com). As a result, attackers could potentially spoof emails from subdomains without being blocked or flagged, even if the main domain has a strict DMARC policy.
Risk description
Without a subdomain policy (sp directive) in the DMARC record, subdomains are not protected by the same DMARC enforcement as the main domain, leaving them vulnerable to spoofing attacks. This inconsistency can be exploited by attackers to send phishing emails from subdomains, undermining the organization’s overall email security.
Recommendation
To mitigate the risk, we recommend configuring the DMARC record with a subdomain policy by adding the sp=reject or sp=quarantine directive. This will extend DMARC enforcement to all subdomains, preventing spoofing attempts and maintaining consistent security across both the main domain and its subdomains.
Evidence
| Domain Queried | DNS Record Type | Description | Value |
|---|---|---|---|
| _dmarc.serviceprofitimprovement.nl | TXT | Text record | "v=DMARC1; p=none" |
Vulnerability description
We found that the DMARC record for the domain is not configured with ruf tag. A missing ruf (forensic reporting) tag in a DMARC record indicates that the domain owner has not enabled the collection of detailed failure reports. Forensic reports provide valuable insights into specific instances where emails fail DMARC authentication. Without the ruf tag, the domain administrator loses the ability to receive and analyze these reports, making it difficult to investigate individual email failures or identify targeted phishing or spoofing attacks that may be exploiting weaknesses in the email authentication setup.
Risk description
Without forensic reports (ruf), domain owners have limited visibility into the specifics of failed DMARC validation. This means potential malicious activity, such as email spoofing or phishing attempts, might go unnoticed until they result in more significant security breaches or reputational damage. Forensic reports allow for quick response to email abuses by providing detailed information about the failure, including the header information of the emails involved. The absence of this data hampers an organization's ability to identify and mitigate threats targeting its domain, increasing the risk of ongoing spoofing and fraud.
Recommendation
We recommend configuring the ruf tag in the DMARC record. This tag specifies where forensic reports should be sent, providing the domain owner with detailed data on DMARC validation failures. Forensic reports allow administrators to analyze why certain emails failed authentication, making it easier to fine-tune DMARC policies or address potential vulnerabilities. Ensure that the ruf email address belongs to a secure and trusted location capable of handling sensitive email data.
Evidence
| Software / Version | Category |
|---|---|
| Apache HTTP Server | Web servers |
| jQuery 3.6.0 | JavaScript libraries |
| Google Tag Manager | Tag managers |
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 |
|---|---|
| Apache HTTP Server | Web servers |
| jQuery 3.6.0 | JavaScript libraries |
| Google Tag Manager | Tag managers |
| Sectigo | SSL/TLS certificate authorities |
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
| Operating System | Accuracy |
|---|---|
| Linux 3.10 - 4.11 | 100% |
Vulnerability description
OS Detection
Evidence
| Domain Queried | DNS Record Type | Description | Value |
|---|---|---|---|
| serviceprofitimprovement.nl | SPF | Sender Policy Framework | "v=spf1 a mx include:_spf.hostnet.nl" |
Evidence
| DKIM selector | Key type | Key size | Value |
|---|---|---|---|
| rsa2 | rsa | 1422 | "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA7+ZSQP9XQFFhXv3Z/wx8V/MJjykIyeuAeM1z7h7tF/EJWNFsgt0sQwBy+Mi8/4hliTon1PvZK037mGpnO5AYv0qeJsoyZ/SG6e7Q8HbJ2WyCcSy2nMGJJV6MkL6rc0E/EX2SIPGu1Nk7dIQ3mOff/2Tp9/oceeeQYSGcgwhUQkvu9l9U/uNAJBkw4F55WfF4e" "9WJmPGvqbfqE/94uc+Uz70GK9ht6ykLePlr5bCQhr0El4E2JIfCao7qAVcUogGIvqBCqva4x6XXQnsp5uy52TGz7R4dDtrk4k/Rr3XpeQcxIr1EgsjM0LhzSrULe5G681KEWKKHUzdiMhwm05CeVwIDAQAB" |
| rsa1 | rsa | 1422 | "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzff31M1EfBjQv4GtI5Sgh0fY8/UageFzzeFp4SHeKOYlQO9eObmgbHgtLtrQrg2tABh3SNyLuKEccFeHDB+BbN+XYV0BukGxYIKviHUzxx1zTpgGP8TD2804v6372YWI6vul2D6X/f+uzfODMBMsKgPFD82ZEil2LNBYBOjqeHxyyZ3BTOQSPwIjr+5eYj0d2" "ry59Eow3p9AzMEW6sAMu//ZoF/keRrnwDW20R9PltzgSoyYwBrRjEDJ4lS9QiGFx305rkzWwIMo+lq9MXrAOsWTrSF1MY3OOoJD3XHYGOlobssPoVvnMm1HCiIFPh2y64fX4pLXGKcXwKEgWHIkTwIDAQAB" |
Evidence
| Domain Queried | DNS Record Type | Description | Value |
|---|---|---|---|
| serviceprofitimprovement.nl | A | IPv4 address | 91.184.0.97 |
| serviceprofitimprovement.nl | NS | Name server | ns01.hostnet.nl |
| serviceprofitimprovement.nl | NS | Name server | ns02.hostnet.nl |
| serviceprofitimprovement.nl | MX | Mail server | 10 mx1.mailpod13-cph3.g1i.hostnet.nl |
| serviceprofitimprovement.nl | MX | Mail server | 10 mx2.mailpod13-cph3.g1i.hostnet.nl |
| serviceprofitimprovement.nl | MX | Mail server | 10 mx3.mailpod13-cph3.g1i.hostnet.nl |
| serviceprofitimprovement.nl | MX | Mail server | 10 mx4.mailpod13-cph3.g1i.hostnet.nl |
| serviceprofitimprovement.nl | SOA | Start of Authority | ns01.hostnet.nl. hostmaster.hostnet.nl. 2026032303 14400 3600 1209600 600 |
| serviceprofitimprovement.nl | SPF | Sender Policy Framework | "v=spf1 a mx include:_spf.hostnet.nl" |
| _dmarc.serviceprofitimprovement.nl | TXT | Text record | "v=DMARC1; p=none" |
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.