External risk intelligence

BURG-WÄCHTER Key App Firmware Update Information Disclosure Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.1)

CVE-2024-48769

The vulnerability exists in a mobile application used for managing specific physical security hardware via firmware updates. While the communication involves a network process, these applications are typically used within a local or trusted context to interact with physical devices, making direct public internet exposure of the update interface uncommon.

Halo Surface Signal: 2 out of 5 — less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

An issue has been identified in a mobile application related to physical security hardware, specifically affecting its firmware update process. This vulnerability could allow unauthorized remote access to sensitive information. While the application communicates over a network, its typical use in a local or trusted context suggests that direct exposure to the public internet is uncommon.

Sensitive data may be exposed during updates.
Confirms the relevance and scope of this application.
Understand potential risks to connected physical security.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this by intercepting or manipulating the firmware update process for the KeyApp. This could allow them to gain unauthorized access to sensitive information stored within the application or associated hardware.

No authentication needed.
Triggered via firmware update process.
Risk of sensitive information disclosure.

Live Threat

Current exploitation, exposure, and threat context

A remote attacker could potentially access sensitive information through the firmware update process of the affected application. This could occur when the application's firmware update mechanism is accessible over a network and is not properly secured.

Sensitive information within the application.
Via an unsecured firmware update process.
Unauthorized access to device controls.

Operational Fix

Recommended remediation, mitigation, and detection steps

Security teams and application owners should collaborate to identify where the affected mobile application is deployed and confirm its reachability and criticality. The first practical step is to locate all instances of the application, assess exposure, and then plan remediation based on identified risks, potentially involving vendor coordination.

Application owners are responsible for this issue.
Verify app reachability and business criticality.
Plan coordinated remediation or vendor engagement.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is the BURG-WÄCHTER Key App?

This mobile application serves as a management interface for BURG-WÄCHTER's physical security hardware. Users rely on it to configure settings and perform critical maintenance tasks, such as firmware updates, to keep their connected locks and security devices operating correctly.

What does CWE-863 mean for CVE-2024-48769?

CWE-863 classifies this as an incorrect authorization weakness. In the context of this CVE, it means the application fails to properly verify or restrict permissions during the firmware update process, allowing an unauthorized party to bypass security controls and access sensitive information that should be protected.

How is this vulnerability triggered?

An attacker initiates the vulnerability by interacting with the firmware update mechanism of the application. The flaw is not triggered by standard, routine app usage; it specifically requires the update process to be active or reachable over the network to intercept or manipulate the data exchange.

Is my deployment at risk according to Halo Surface Signal?

Halo Surface Signal notes that while the app uses network communications, it is generally used in local or trusted contexts to manage physical hardware. Because this interface is rarely exposed directly to the public internet, the likelihood of remote exploitation is considered low for most typical deployments.

What should I do if I use this app?

Start by identifying every device where this application is installed. Evaluate whether these devices are reachable over untrusted networks and determine their business criticality. Once you have an inventory, coordinate with your internal teams or the vendor to monitor for official security updates that address the authorization flaw.

References

github.com/HankJames/Vul-Reports/blob/main/FirmwareLeakage/de.bu…

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.