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Home Alerts

Microsoft Warns Helm Chart Expose Data

May 6, 2025
Reading Time: 2 mins read
in Alerts
Microsoft Warns Helm Chart Expose Data

Microsoft has issued a warning about the security risks linked to default Kubernetes configurations, particularly in Helm charts. These charts, used to deploy applications on Kubernetes, often lack security controls such as authentication, open exploitable ports, and use weak passwords. Microsoft researchers highlighted cases where these flaws exposed Kubernetes workloads to public exploitation, compromising sensitive data. They emphasized that many organizations fail to review the default Helm chart configurations, unintentionally leaving applications vulnerable.

Kubernetes, a popular open-source platform, automates the management of containerized applications, while Helm simplifies the deployment process with YAML file templates.

While Helm charts speed up the deployment of complex applications, their default settings often lack crucial security measures. This makes it easy for users, especially those unfamiliar with cloud security, to deploy misconfigured applications that are exposed to the internet, increasing the risk of attack.

The report pointed out three specific Helm chart vulnerabilities: Apache Pinot, Meshery, and Selenium Grid. Apache Pinot exposed key services without authentication, Meshery allowed public sign-ups from exposed IPs, and Selenium Grid’s NodePort service relied on weak external firewall protection. These flaws open the door for attackers to exploit Kubernetes environments, as evidenced by attacks on misconfigured Selenium Grid instances that deployed cryptocurrency miners.

To address these risks, Microsoft recommends that users review Helm chart configurations before deployment, ensuring proper authentication and network isolation.

Additionally, organizations should regularly scan for misconfigurations, monitor containers for suspicious activity, and take steps to secure exposed workload interfaces. Proper security hygiene can significantly reduce the likelihood of successful attacks on Kubernetes workloads.

Reference:

  • Microsoft Warns Default Kubernetes Helm Chart Configurations Can Expose Data
Tags: Cyber AlertsCyber Alerts 2025CyberattackCybersecurityMay 2025
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