CVE-2023-36474 : Exploit Details and Defense Strategies

Interactsh server settings make users vulnerable to Subdomain Takeover.

Understanding CVE-2023-36474

Interactsh is an open-source tool for detecting out-of-band interactions. Domains configured with interactsh server prior to version 1.0.0 were vulnerable to subdomain takeover for a specific subdomain, i.e

app.

This security issue arises when interactsh server creates CNAME entries pointing to

projectdiscovery.github.io

, making users susceptible to cross-site scripting attacks.

What is CVE-2023-36474?

Interactsh server settings before version 1.0.0 could lead to subdomain takeover vulnerabilities, allowing threat actors to run arbitrary client-side code in a user's browser due to misconfigured CNAME entries.

The Impact of CVE-2023-36474

This vulnerability exposes users to cross-site scripting attacks, compromising the integrity of the affected systems and potentially leading to information leakage.

Technical Details of CVE-2023-36474

Interactsh server settings prior to version 1.0.0 had a security flaw that enabled threat actors to exploit subdomain takeover vulnerabilities.

Vulnerability Description

The vulnerable configuration by default created CNAME entries pointing to GitHub pages, posing a risk of arbitrary client-side code execution.

Affected Systems and Versions

The vulnerability affects interactsh server versions prior to 1.0.0. Users with such configurations are at risk of subdomain takeovers.

Exploitation Mechanism

Threat actors could exploit misconfigured CNAME entries to run malicious client-side scripts on vulnerable subdomains, targeting users visiting these domains.

Mitigation and Prevention

Users can take immediate steps to reduce the risk of subdomain takeovers and protect their systems from potential attacks.

Immediate Steps to Take

Update interactsh server to version 1.0.0 or higher to prevent subdomain takeover vulnerabilities. Remove any unnecessary CNAME entries pointing to GitHub pages.

Long-Term Security Practices

Regularly audit DNS configurations and ensure that all settings are secure. Employ security best practices for web server configurations to prevent similar vulnerabilities in the future.

Patching and Updates

Stay informed about security advisories and updates related to interactsh server. Promptly apply patches and updates to stay protected against known vulnerabilities.