Introducing Miggo’s Dangling DNS Detector: Detection and Prevention for Domain Takeovers

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Attackers are constantly looking for vulnerabilities in web applications and unused domains are a perfect target because they are out of mind and often out of sight. We're excited to announce Miggo’s Dangling DNS Detector, the automated way to detect DNS entries and prevent takeovers.

The TL;DR on Dangling DNS

When a DNS entry in your domain points to a CNAME record that no longer exists, it creates what's called a "Dangling DNS" - named this way because the domain is left "dangling" without a valid destination.

When an organization is unaware of the state of their DNS records, it leaves the domain vulnerable to an attack known as a subdomain takeover. A subdomain takeover is a common security threat that allows attackers to hijack traffic to your services or take over your domain. There are two key scenarios that we’re helping teams prevent:

Domains under your control being reclaimed: If portal.yourcompany.com points to an unclaimed yourcompany.someSaaS.com, anyone who registers that unclaimed domain can intercept sensitive traffic, harvest credentials, and compromise a company’s security.
Domains not under your control being reclaimed: Any 3rd party domain that you’re using being taken over without you realizing.

Detecting these threats early can prevent attacks on your services.

Why Staying in Control is Challenging

Organizations of all sizes understand the importance of protecting their users. However, for most, regularly monitoring for empty aliases and keeping track of unused aliases is challenging without the right tools in place. Teams struggle with:

Not Having Easy Way to Detect: Identifying all potential domain takeover vulnerabilities across hundreds or thousands of DNS records and multiple application environments requires sophisticated monitoring capabilities that exceed traditional security tools.
Needing to Review Too Many Alerts: When vulnerabilities are identified, security teams often receive numerous alerts without context about which ones pose genuine business risk versus those that might be technically valid but represent minimal real-world exposure.
Not Having Access In-Application Context: Without understanding which applications depend on vulnerable DNS configurations and how they're being used, security teams struggle to effectively prioritize remediation efforts.

“We knew that certain misconfigurations in our infrastructure—whether related to our own services or third-party dependencies—could open the door to security vulnerabilities, but we had no scalable way to tell when an issue arose. Point-in-time audits gave us a snapshot; the periods between audits lacked effective monitoring, and separating real risk from background noise took more engineering hours than we could spare.” - Senior Security Architect

Automatically Detect Domain Takeover Risks with Miggo

A critical layer within a security program is proactively identifying and preventing dangling DNS entries to mitigate subdomain takeovers. A domain can become dangling at any time, teams need a tool to continuously monitor, maintain an update to date domain inventory, and send real-time alerts to keep them in control and protected against subdomain takeover risk. We are excited to announce Miggo’s Dangling DNS Detector, a new feature to that accurately detects DNS entries within your organization that might be dangling and provides the context required to prevent them from turning into attacks.

By using Miggo’s Dangling DNS Detector, teams get:

1. Complete DNS Visibility

Unowned domains: Miggo accurately identifies when your DNS CNAME record points to domains that aren't currently registered or properly maintained by your organization.
Third-party unowned domains: Miggo detects and alerts when applications actively communicate with third-party domains that are unregistered or improperly maintained.

2. Application-Aware Prioritization

Application Mapping: Each vulnerable DNS configuration is automatically mapped to the specific application or service it affects, helping teams understand the potential business impact.
Active Traffic Analysis: Miggo analyzes DNS flow patterns to determine which vulnerable DNS configuration involves active data exchanges.

3. Efficient Remediation Workflows

Real-time Alerts: Security teams receive alerts with full vulnerability context and affected application assets.
Risk-Based Remediation Guidance: Ensure resources can focus on addressing the highest-risk vulnerabilities first.
Remediation Validation: Continuous monitoring ensures remediation efforts can be validated, providing assurances that fixes were properly implemented and effective.

The new Dangling DNS Detector works out of the box, and doesn’t require manual efforts to maintain an up to date list of domains. Miggo enables teams to address domain takeover vulnerabilities head on with our new Dangling DNS Detector.

Start Detecting and Preventing Dangling DNS Entries

Miggo’s new Dangling DNS Detector enables teams with an automated way to detect, prioritize efforts using application rich context, and respond to threats quickly.

Don't wait for attackers to exploit your vulnerable DNS configurations. Book time with us today to learn how Miggo prevents domain takeover threats.

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Introducing Miggo’s Dangling DNS Detector: Detection and Prevention for Domain Takeovers

The TL;DR on Dangling DNS

Why Staying in Control is Challenging

Automatically Detect Domain Takeover Risks with Miggo

By using Miggo’s Dangling DNS Detector, teams get:

Start Detecting and Preventing Dangling DNS Entries

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