CVE-2024-31990 in argo-cd
Summary
by MITRE • 04/15/2024
Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. The API server does not enforce project sourceNamespaces which allows attackers to use the UI to edit resources which should only be mutable via gitops. This vulenrability is fixed in 2.10.7, 2.9.12, and 2.8.16.
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Analysis
by VulDB Data Team • 04/06/2025
The vulnerability identified as CVE-2024-31990 affects Argo CD, a widely adopted declarative GitOps continuous delivery tool for Kubernetes environments. This security flaw resides within the API server component of Argo CD and represents a critical authorization bypass issue that undermines the fundamental principles of GitOps governance. The vulnerability specifically targets the project sourceNamespaces enforcement mechanism, which is designed to control which namespaces can be modified through the declarative configuration approach that GitOps promotes. When this enforcement is bypassed, it creates a scenario where unauthorized modifications can occur through the user interface, effectively undermining the immutable infrastructure principles that GitOps is built upon.
The technical implementation of this vulnerability stems from the API server's failure to properly validate sourceNamespaces parameters during resource modification operations. This flaw allows attackers to manipulate the UI to edit resources that should only be mutable through the proper GitOps workflow involving source code repositories and automated deployment processes. The vulnerability essentially permits direct UI-based modifications to resources that are restricted by namespace policies, creating a pathway for privilege escalation and unauthorized changes to the Kubernetes cluster configuration. This represents a direct violation of the principle of least privilege that is central to secure Kubernetes operations and GitOps implementation.
Operationally, this vulnerability poses significant risks to organizations relying on Argo CD for their continuous delivery workflows. Attackers who can exploit this vulnerability can bypass the intended security controls that separate development, staging, and production environments through namespace restrictions. The impact extends beyond simple configuration changes, as it enables potential lateral movement within the cluster and could facilitate more sophisticated attacks that leverage the compromised UI access to manipulate critical infrastructure components. The vulnerability affects all versions prior to the patched releases of 2.10.7, 2.9.12, and 2.8.16, leaving many organizations exposed to potential exploitation in production environments where Argo CD is deployed. Organizations using Argo CD in multi-tenant or highly regulated environments face particular risk as this vulnerability could enable unauthorized access to sensitive namespaces and resources.
Organizations should prioritize immediate remediation by upgrading to the patched versions mentioned in the advisory, as these releases contain the necessary fixes to restore proper sourceNamespaces enforcement. The mitigation strategy should include comprehensive review of existing Argo CD configurations to ensure that namespace restrictions are properly enforced and that the UI access controls are functioning as intended. Security teams should also implement monitoring for unauthorized UI access patterns and configuration changes that might indicate exploitation attempts. This vulnerability aligns with CWE-284, which addresses improper access control, and could potentially be leveraged as part of broader attack chains that map to ATT&CK techniques involving privilege escalation and persistence within Kubernetes environments. The fix addresses the core authorization bypass issue by strengthening the API server's validation logic and ensuring that sourceNamespaces restrictions are properly enforced regardless of the modification method used.
The vulnerability demonstrates the critical importance of maintaining up-to-date security controls in GitOps environments where the UI serves as a potential attack surface for bypassing automated security mechanisms. Organizations should conduct thorough security assessments of their Argo CD deployments to identify any additional misconfigurations that could compound the risks associated with this vulnerability. Regular security scanning and vulnerability management processes should include specific checks for Argo CD versions and their compliance with security best practices. The incident underscores the necessity of treating GitOps platforms as critical infrastructure components requiring regular security updates and monitoring, particularly in environments where multiple teams have access to the UI and automated deployment capabilities.