Vulnerability Scan Result
| Title: | 1.SERVIS-ENERGO, s.r.o. |
| Description: | 1.SERVIS-ENERGO, s.r.o. |
| ip_address | 194.228.249.8 |
| country | CZ  |
| network_name | O2 Czech Republic a.s. |
| asn | AS5610 |
80/tcp | http | Apache httpd - |
443/tcp | https | Apache httpd - |
| Software / Version | Category |
|---|---|
| Apache HTTP Server | Web servers |
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://www.servisenergo.eu/ | 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
| URL | Evidence |
|---|---|
| https://www.servisenergo.eu/ | 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 | |
| OWASP Top 10 - 2021 |
Evidence
| URL | Evidence |
|---|---|
| https://www.servisenergo.eu/ | 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 | Method | Parameters | Evidence |
|---|---|---|---|
| https://www.servisenergo.eu/ | GET | Headers: User-Agent=Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36 | Suspicious comment bug found in: |
Vulnerability description
We have discovered that the target application's code contains suspicious comments that may be related to potential bugs, incomplete functionality, or weaknesses. These comments often arise during development and testing phases but are inadvertently left in the code.
Risk description
The risk exists that attackers could analyze these comments to identify vulnerabilities or weaknesses in the application. While comments themselves do not directly lead to security breaches, they may guide attackers to focus their efforts on specific parts of the application, potentially uncovering and exploiting vulnerabilities.
Recommendation
Remove comments that suggest the presence of bugs, incomplete functionality, or weaknesses, before deploying the application.
Classification
| CWE | CWE-546 |
| OWASP Top 10 - 2017 | |
| OWASP Top 10 - 2021 |
Evidence
| Software / Version | Category |
|---|---|
| Apache HTTP Server | Web servers |
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 |
Evidence
| URL | Evidence |
|---|---|
| https://www.servisenergo.eu/ | Response headers do not include the Referrer-Policy HTTP security header as well as the |
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 | |
| OWASP Top 10 - 2021 |
Evidence
| URL | Method | Summary |
|---|---|---|
| https://www.servisenergo.eu/?canary=mtqknqggwe | TRACE | We injected a random query parameter inside a HTTP TRACE request. The server responded with a 200 OK HTTP status code and we found the random value reflected in the body of the response. |
Vulnerability description
We have noticed that the webserver responded with a 200 OK HTTP status when a TRACE/TRACK HTTP request was sent. Originally intended for debugging purposes, these methods respond to requests by echoing back the contents of the request received.
Risk description
The only risk this might present nowadays is revealing HTTP headers that have been appended by intermediate proxy servers on the way to the destination. This can present a danger if any of those headers contain sensitive information like authentication information, secret keys.
Recommendation
Generally, it is good practice to disable unused functionality to minimize your attack surface. We recommend that you disable unused HTTP methods, or even better, allow only the ones that you know are used. This can be done using your webserver configuration.
Classification
| CWE | CWE-16 |
| 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 |
Evidence
| URL | Method | Parameters | Evidence |
|---|---|---|---|
| https://www.servisenergo.eu/ | GET | Headers: User-Agent=Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36 | Email Address: petrnovak@servisenergo.cz |
Vulnerability description
We noticed that this web application exposes email addresses, which might be unintended. While not inherently a vulnerability, this information could be leveraged in social engineering or spam related activities.
Risk description
The risk is that exposed email addresses within the application could be accessed by unauthorized parties. This could lead to privacy violations, spam, phishing attacks, or other forms of misuse.
Recommendation
Compartmentalize the application to have 'safe' areas where trust boundaries can be unambiguously drawn. Do not allow email addresses to go outside of the trust boundary, and always be careful when interfacing with a compartment outside of the safe area.
Classification
| CWE | CWE-200 |
| OWASP Top 10 - 2017 | |
| OWASP Top 10 - 2021 |
Evidence
| URL | Method | Summary |
|---|---|---|
| https://www.servisenergo.eu/ | OPTIONS | We did a HTTP OPTIONS request. The server responded with a 200 status code and the header: `Allow: GET,HEAD,POST,OPTIONS,TRACE` 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 | |
| OWASP Top 10 - 2021 |
Infrastructure Vulnerabilities
Evidence
We found insecure DNS cookie usage on the following nameservers: gracie.ns.cloudflare.com, kai.ns.cloudflare.com
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 |
|---|---|---|---|
| www.servisenergo.eu | A | IPv4 address | 194.228.249.8 |
| www.servisenergo.eu | NS | Name server | gracie.ns.cloudflare.com |
| www.servisenergo.eu | NS | Name server | kai.ns.cloudflare.com |
| www.servisenergo.eu | SOA | Start of Authority | gracie.ns.cloudflare.com. dns.cloudflare.com. 2415833195 10000 2400 604800 1800 |
| www.servisenergo.eu | CNAME | Canonical name | servisenergo.eu |
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.
Evidence
| Software / Version | Category |
|---|---|
| Apache HTTP Server | Web servers |
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 4.4 | 100% |
Vulnerability description
OS Detection