External risk intelligence

Chamberlain myQ iOS Rate Limiting Bypass Allows Account Takeover

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2023-24080

The vulnerability exists in a password reset endpoint for a cloud-connected IoT application. Such endpoints are public-facing by design to facilitate user account management and remote access to the associated IoT devices, making them inherently reachable from the internet in normal operation.

Chamberlain Myq

5.222.0.32277

Halo Surface Signal: 5 out of 5 — more likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A security weakness was identified in the Chamberlain myQ application that could allow unauthorized access to user accounts. This issue stems from a lack of sufficient controls on the password reset function, potentially enabling attackers to guess user credentials.

Accounts can be compromised by guessing passwords.
This impacts user access to connected devices.
Confirm relevance and assess potential exposure.

Attack Path

How an attacker could exploit the issue

Attackers can target users of a popular smart home app by exploiting a weakness in its account recovery feature. By repeatedly sending requests to reset a user's password, an attacker can eventually guess the correct password and gain unauthorized access to the user's account. This could allow them to control the connected smart devices or access personal information associated with the account.

No user interaction needed.
Password reset endpoint.
Account takeover and control.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an attacker to take control of a user's account by repeatedly guessing the password reset code. When supported by the advisory, this could expose sensitive information or allow unauthorized control of connected devices.

User accounts and connected devices at risk.
Repeatedly guessing password reset codes.
Unauthorized account access and control.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in the Chamberlain myQ app's password reset function requires a coordinated response from application owners and security teams. The first practical step involves identifying all instances of the affected app, verifying its reachability and criticality to business operations, and pinpointing the accountable owner before planning remediation based on risk.

Application owners should confirm affected instances.
Verify reachability and business criticality.
Plan remediation based on risk assessment.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Chamberlain myQ?

Chamberlain myQ is a smart home platform that allows users to control devices like garage door openers and gate operators remotely. The affected software is the myQ application designed for iOS, which acts as the digital interface for managing these connected physical systems over the internet.

What does CWE-307 mean for CVE-2023-24080?

CWE-307 refers to Improper Restriction of Excessive Authentication Attempts. In the context of CVE-2023-24080, this means the application's password reset mechanism lacks necessary safeguards, such as rate limiting, which normally prevent an automated system from making a massive number of guesses in a short time.

How can an attacker trigger this vulnerability?

An attacker targets the password reset endpoint by sending repeated, automated requests to guess the recovery code. Simply navigating or logging into the app normally does not trigger this issue; it requires a targeted, high-volume interaction with the specific reset function to bypass standard security controls.

Why is this CVE relevant to me?

According to Halo Surface Signal, this vulnerability is significant because the password reset endpoint is inherently internet-facing to support remote account management. Because the service must be reachable from the outside world for legitimate use, it remains accessible to unauthorized network traffic.

What should I do if I use this software?

If you are responsible for maintaining or overseeing this application, begin by locating all installations within your environment. Verify how the app is being used, determine its importance to your daily operations, and identify the team member responsible for it so you are prepared to apply updates as they become available.

References

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Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.