Vulnerability Scan Result
| Title: | Tresorit File Viewer |
| Description: | Tresorit is an encrypted cloud storage service that lets you store, sync and share confidential documents. The preview of the content will only be available after opening the link. |
| ip_address | 40.112.93.201 |
| country | IE  |
| network_name | Microsoft Corporation |
| asn | AS8075 |
80/tcp | http | - - |
443/tcp | https | - - |
| Software / Version | Category |
|---|---|
| Amazon Web Services | PaaS |
| Amazon S3 | CDN |
| Azure | PaaS |
| Open Graph | Miscellaneous |
| Sectigo | SSL/TLS certificate authorities |
| HSTS | Security |
Web Application Vulnerabilities
Evidence
| URL | Evidence |
|---|---|
| https://web.tresorit.com/l/L26y1 | Response headers include the HTTP Content-Security-Policy security header with the following security issues: |
Vulnerability description
We noticed that the Content-Security-Policy (CSP) header configured for the web application includes unsafe directives. The CSP header activates a protection mechanism implemented in web browsers which prevents exploitation of Cross-Site Scripting vulnerabilities (XSS) by restricting the sources from which content can be loaded or executed.
Risk description
For example, if the unsafe-inline directive is present in the CSP header, the execution of inline scripts and event handlers is allowed. This can be exploited by an attacker to execute arbitrary JavaScript code in the context of the vulnerable application.
Recommendation
Remove the unsafe values from the directives, adopt nonces or hashes for safer inclusion of inline scripts if they are needed, and explicitly define the sources from which scripts, styles, images or other resources can be loaded.
Classification
| CWE | CWE-693 |
| OWASP Top 10 - 2017 | |
| OWASP Top 10 - 2021 |
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
| Software / Version | Category |
|---|---|
| Amazon Web Services | PaaS |
| Amazon S3 | CDN |
| Azure | PaaS |
| Open Graph | Miscellaneous |
| Sectigo | SSL/TLS certificate authorities |
| 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
| URL | Method | Summary |
|---|---|---|
| https://web.tresorit.com/l/L26y1 | OPTIONS | We did a HTTP OPTIONS request. The server responded with a 200 status code and the header: `Allow: OPTIONS, TRACE, GET, HEAD, POST` 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
| Domain Queried | DNS Record Type | Description | Value |
|---|---|---|---|
| web.tresorit.com | A | IPv4 address | 40.112.93.201 |
| web.tresorit.com | CNAME | Canonical name | prodwebclient.azurewebsites.net |
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 |
|---|---|
| Amazon Web Services | PaaS |
| Azure | PaaS |
| Sectigo | SSL/TLS certificate authorities |
| HSTS | Security |
| Amazon S3 | CDN |
| Open Graph | 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.