Vulnerability Scan Result
| Title: | Farcaster |
| Description: | A decentralized social network |
| ip_address | 104.18.42.135 |
| country | - |
| network_name | Cloudflare Inc |
| asn | AS13335 |
| ip_address | 172.64.145.121 |
| country | - |
| network_name | Cloudflare Inc |
| asn | AS13335 |
80/tcp | http | Cloudflare http proxy - |
443/tcp | https | cloudflare - |
2082/tcp | http | Cloudflare http proxy - |
2083/tcp | https | nginx - |
2086/tcp | http | Cloudflare http proxy - |
2087/tcp | https | nginx - |
8080/tcp | http | Cloudflare http proxy - |
8443/tcp | http | cloudflare - |
| Software / Version | Category |
|---|---|
| Amazon Web Services | PaaS |
| Amazon CloudFront | CDN |
| Google Font API | Font scripts |
| HTTP/3 | Miscellaneous |
| PWA | Miscellaneous |
| Cloudflare | CDN |
| HSTS | Security |
Web Application Vulnerabilities
Evidence
| URL | Evidence |
|---|---|
| https://farcaster.xyz/ | 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 | |
| OWASP Top 10 - 2021 |
Evidence
| Software / Version | Category |
|---|---|
| Amazon Web Services | PaaS |
| Amazon CloudFront | CDN |
| Google Font API | Font scripts |
| HTTP/3 | Miscellaneous |
| PWA | Miscellaneous |
| Cloudflare | CDN |
| HSTS | Security |
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
Vulnerability description
We found the robots.txt on the target server. This file instructs web crawlers what URLs and endpoints of the web application they can visit and crawl. Website administrators often misuse this file while attempting to hide some web pages from the users.
Risk description
There is no particular security risk in having a robots.txt file. However, it's important to note that adding endpoints in it should not be considered a security measure, as this file can be directly accessed and read by anyone.
Recommendation
We recommend you to manually review the entries from robots.txt and remove the ones which lead to sensitive locations in the website (ex. administration panels, configuration files, etc).
Evidence
| URL | Evidence |
|---|---|
| https://farcaster.xyz/ | 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 |
Infrastructure Vulnerabilities
Evidence
We checked 2056 selectors but found no DKIM records.
Vulnerability description
We found that no DKIM record was configured. When a DKIM (DomainKeys Identified Mail) record is not present for a domain, it means that outgoing emails from that domain are not cryptographically signed. DKIM is a critical component of email authentication, allowing recipients to verify that an email was genuinely sent from an authorized server and that the message has not been altered in transit. The absence of a DKIM record leaves the domain vulnerable to email spoofing and phishing attacks, as attackers can send fraudulent emails that appear to originate from the domain without any cryptographic verification.
Risk description
Without a DKIM record, recipients have no way of verifying the integrity or authenticity of emails sent from the domain. This increases the likelihood of phishing and spoofing attacks, where malicious actors impersonate the domain to send fraudulent emails. This can lead to significant security incidents, such as credential theft, financial fraud, or the distribution of malware. Additionally, many email providers use DKIM as part of their spam and reputation filters, meaning that emails from a domain without DKIM may be flagged as spam or rejected, impacting the deliverability and reputation of legitimate emails.
Recommendation
We recommend implementing DKIM for your domain to enhance email security and protect your brand from email-based attacks. Generate a DKIM key pair (public and private keys), publish the public key in the DNS under the appropriate selector, and configure your email servers to sign outgoing messages using the private key. Ensure that the DKIM key length is at least 1024 bits to prevent cryptographic attacks. Regularly monitor DKIM signatures to ensure the system is functioning correctly and update keys periodically to maintain security.
Evidence
We found insecure DNS cookie usage on the following nameservers: lola.ns.cloudflare.com, brian.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 |
|---|---|---|---|
| farcaster.xyz | SPF | Sender Policy Framework | "v=spf1 include:amazonses.com -all" |
Evidence
| Operating System | Accuracy |
|---|---|
| FreeBSD 11.1-STABLE | 91% |
Vulnerability description
OS Detection
Evidence
| Software / Version | Category |
|---|---|
| Cloudflare | CDN |
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
| Domain Queried | DNS Record Type | Description | Value |
|---|---|---|---|
| farcaster.xyz | A | IPv4 address | 104.18.42.135 |
| farcaster.xyz | A | IPv4 address | 172.64.145.121 |
| farcaster.xyz | NS | Name server | lola.ns.cloudflare.com |
| farcaster.xyz | NS | Name server | brian.ns.cloudflare.com |
| farcaster.xyz | MX | Mail server | 10 inbound-smtp.us-east-1.amazonaws.com |
| farcaster.xyz | SOA | Start of Authority | brian.ns.cloudflare.com. dns.cloudflare.com. 2390090457 10000 2400 604800 1800 |
| farcaster.xyz | AAAA | IPv6 address | 2606:4700:4401::6812:2a87 |
| farcaster.xyz | AAAA | IPv6 address | 2606:4700:4407::ac40:9179 |
| farcaster.xyz | TXT | Text record | "google-site-verification=bdYxpoEvbJWVeGVGC1ZM_yn3pat2onw6H16gkgkEP5Q" |
| farcaster.xyz | TXT | Text record | "google-site-verification=hzgakVEJ8JBP8YNMkwZmLuiaJuNv2PNXFVUTE_Y4UqU" |
| farcaster.xyz | SPF | Sender Policy Framework | "v=spf1 include:amazonses.com -all" |
| _dmarc.farcaster.xyz | TXT | Text record | "v=DMARC1;p=quarantine;sp=quarantine;pct=100;adkim=r;aspf=r;rua=mailto:3588e368d5884ffb8ba9388b96e52802@dmarc-reports.cloudflare.net,mailto:85C194@dmarcmntr.com;ruf=mailto:85C194@dmarcmntr.com;fo=1:d:s" |
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
| Domain Queried | DNS Record Type | Description | Value |
|---|---|---|---|
| _dmarc.farcaster.xyz | TXT | Text record | "v=DMARC1;p=quarantine;sp=quarantine;pct=100;adkim=r;aspf=r;rua=mailto:3588e368d5884ffb8ba9388b96e52802@dmarc-reports.cloudflare.net,mailto:85C194@dmarcmntr.com;ruf=mailto:85C194@dmarcmntr.com;fo=1:d:s" |
Evidence
| Software / Version | Category |
|---|---|
| Amazon Web Services | PaaS |
| HSTS | Security |
| Cloudflare | CDN |
| Amazon CloudFront | CDN |
| HTTP/3 | Miscellaneous |
| Google Font API | Font scripts |
| PWA | Miscellaneous |
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 |
|---|---|
| Cloudflare | CDN |
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 |
|---|---|
| Cloudflare | CDN |
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.