CVE-2024-7598 in kube-apiserver
Summary
by MITRE • 03/20/2025
A security issue was discovered in Kubernetes where a malicious or compromised pod could bypass network restrictions enforced by network policies during namespace deletion. The order in which objects are deleted during namespace termination is not defined, and it is possible for network policies to be deleted before the pods that they protect. This can lead to a brief period in which the pods are running, but network policies that should apply to connections to and from the pods are not enforced.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 03/20/2025
This vulnerability exists within the Kubernetes orchestration platform where the deletion sequence of objects during namespace termination creates a window of opportunity for malicious actors to exploit network policy enforcement gaps. The issue stems from the lack of defined deletion order when a namespace is being terminated, allowing for a race condition scenario where network policies may be removed before the pods they are meant to protect are deleted. This fundamental design flaw creates a temporal inconsistency in network security enforcement that can be leveraged by attackers to gain unauthorized access to resources that should otherwise be protected by network policies.
The technical flaw manifests as an improper object deletion sequence that violates the expected security boundaries within Kubernetes. When a namespace is marked for deletion, the system does not guarantee that network policy objects will be removed after all pods that depend on those policies, creating a potential security gap where pods continue to operate without proper network restrictions. This vulnerability specifically affects the network policy enforcement mechanism and represents a violation of the principle of least privilege as defined in cybersecurity frameworks. The issue aligns with CWE-1248 which addresses improper handling of object deletion sequences and can be categorized under ATT&CK technique T1046 for network service discovery and T1566 for malicious file execution through compromised containers.
The operational impact of this vulnerability is significant as it allows for temporary network policy bypass during namespace deletion operations, potentially enabling attackers to establish persistent access or exfiltrate data from pods that should be isolated. During the brief window between network policy removal and pod deletion, malicious actors can exploit this gap to perform unauthorized network communications, potentially leading to lateral movement within the cluster or access to sensitive resources. This creates a critical security gap that undermines the integrity of network segmentation strategies and can result in data breaches or privilege escalation attacks.
Mitigation strategies should focus on implementing proper namespace deletion ordering and ensuring that network policies are maintained until all dependent pods have been properly terminated. Organizations should consider implementing automated checks that verify network policy enforcement before allowing namespace deletion to proceed, and should monitor for anomalous deletion patterns that might indicate exploitation attempts. The recommended approach includes updating Kubernetes versions to those that address the deletion ordering issue, implementing additional monitoring for namespace deletion events, and ensuring that network policy controllers are properly configured to maintain enforcement boundaries during termination sequences. Security teams should also consider implementing runtime protection measures that can detect and prevent unauthorized network access patterns during namespace operations, as this vulnerability can be exploited through standard container compromise techniques.