TLS Bootstrap Attack Exposes Azure Kubernetes Services Cluster

August 20, 2024 | A newly discovered bug in Microsoft Azure Kubernetes Services (AKS) could allow attackers with pod access to escalate privileges and access sensitive credentials. Mandiant’s research indicates that exploiting this vulnerability may lead to data theft and financial loss.

An attacker with command execution rights in a Kubernetes pod could download cluster provisioning configurations, extract TLS bootstrap tokens, and execute a TLS Bootstrap Attack, potentially reading all secrets within the cluster.

Experts highlight the risk of malicious insiders attempting to access unauthorized application secrets. While Microsoft has issued a patch, security teams must audit AKS configurations, rotate Kubernetes secrets, and enforce strict security policies.

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