CVE-2013-1398 in Puppet
Summary
by MITRE
The pe_mcollective module in Puppet Enterprise (PE) before 2.7.1 does not properly restrict access to a catalog of private SSL keys, which allows remote authenticated users to obtain sensitive information and gain privileges by leveraging root access to a node, related to the master role.
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Analysis
by VulDB Data Team • 05/08/2026
The vulnerability identified as CVE-2013-1398 affects the pe_mcollective module within Puppet Enterprise versions prior to 2.7.1, presenting a critical security flaw that undermines the integrity of the system's certificate management infrastructure. This issue stems from improper access controls within the module's implementation, specifically concerning the handling of private SSL keys that are part of the master role configuration. The vulnerability represents a significant weakness in the principle of least privilege and access control mechanisms that should normally prevent unauthorized access to sensitive cryptographic materials.
The technical flaw manifests when authenticated users with access to a node in the Puppet infrastructure can exploit the module's insufficient restrictions to obtain catalog information containing private SSL keys. This occurs because the pe_mcollective module fails to properly validate access permissions before exposing catalog data that includes private key material. The vulnerability is particularly dangerous because it allows attackers to leverage their authenticated access to a node to escalate privileges and gain access to sensitive information that should remain restricted. The flaw essentially creates a path for privilege escalation through the exploitation of improperly secured certificate distribution mechanisms.
The operational impact of this vulnerability is severe and multifaceted, as it enables attackers to compromise the entire Puppet Enterprise infrastructure by obtaining private SSL keys that can be used for authentication and authorization bypasses. Once an attacker gains access to these private keys, they can impersonate legitimate nodes within the Puppet network, potentially gaining access to additional systems and resources that are protected by the Puppet infrastructure. The vulnerability also allows for information disclosure that can reveal the internal structure of the Puppet deployment, including node configurations, resource dependencies, and other sensitive operational details that could be exploited in subsequent attacks.
Organizations utilizing Puppet Enterprise versions prior to 2.7.1 are particularly vulnerable to this attack vector as it directly undermines the security model of the platform. The flaw can be exploited through a combination of authenticated access to a node and understanding of the module's internal workings, making it a sophisticated attack that requires minimal specialized knowledge. This vulnerability aligns with CWE-284, which addresses improper access control, and represents a clear violation of the principle that sensitive cryptographic materials should never be exposed to unauthorized users within a system. The attack pattern follows the MITRE ATT&CK framework's privilege escalation techniques, specifically targeting credential access and defense evasion through the exploitation of legitimate system components.
The recommended mitigation for this vulnerability involves immediate upgrading to Puppet Enterprise version 2.7.1 or later, which includes proper access controls and restrictions on catalog exposure. Organizations should also implement network segmentation and monitoring to detect unauthorized access attempts to Puppet master components. Additional security measures include regular auditing of access controls, implementation of principle of least privilege for Puppet module permissions, and ensuring that private key materials are properly protected through secure key management practices. The vulnerability demonstrates the critical importance of proper access control implementation in distributed systems and highlights the need for regular security assessments of infrastructure components that handle sensitive cryptographic materials.