CVE-2022-36888 in HashiCorp Vault Plugin
Summary
by MITRE • 07/27/2022
A missing permission check in Jenkins HashiCorp Vault Plugin 354.vdb_858fd6b_f48 and earlier allows attackers with Overall/Read permission to obtain credentials stored in Vault with attacker-specified path and keys.
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Analysis
by VulDB Data Team • 08/28/2022
The vulnerability identified as CVE-2022-36888 represents a critical authorization bypass flaw within the Jenkins HashiCorp Vault Plugin ecosystem. This issue affects versions prior to 354.vdb_858fd6b_f48 and stems from a fundamental missing permission check that undermines the security model of credential management within Jenkins environments. The flaw specifically targets the plugin's handling of Vault credential retrieval operations, creating a scenario where unauthorized users can exploit legitimate access paths to extract sensitive information from the Vault system.
The technical implementation of this vulnerability resides in the insufficient validation of user permissions during credential retrieval requests. When an attacker with only Overall/Read permission attempts to access Vault credentials, the plugin fails to properly verify whether the requester should have access to the specific Vault path and keys being requested. This missing authorization check allows the attacker to specify arbitrary Vault paths and key names, effectively bypassing the intended access controls that should restrict credential access based on user permissions and role-based access control policies. The vulnerability operates at the application layer and directly impacts the integrity of the Jenkins credential management system.
The operational impact of this vulnerability extends beyond simple unauthorized access to potentially compromise entire Jenkins infrastructure and the sensitive data it manages. Attackers can leverage this flaw to extract credentials, API keys, and other sensitive information stored in HashiCorp Vault, which may include database credentials, cloud service access tokens, and other privileged account information. This capability significantly increases the attack surface for Jenkins environments and can lead to cascading security breaches where compromised credentials are used to access additional systems and resources within the organization's infrastructure. The vulnerability particularly affects environments where Jenkins serves as a central automation hub managing multiple projects and services that depend on Vault for credential management.
Organizations should immediately upgrade to the patched version of the Jenkins HashiCorp Vault Plugin to remediate this vulnerability and prevent potential exploitation. Additionally, administrators should implement comprehensive monitoring of Vault access patterns and credential retrieval activities to detect anomalous behavior that might indicate exploitation attempts. The vulnerability aligns with CWE-284, which addresses improper access control issues in software systems, and represents a clear violation of the principle of least privilege that should govern all credential access mechanisms. Security teams should also consider implementing additional layers of protection such as network segmentation, API rate limiting, and enhanced logging to mitigate potential exploitation and provide better visibility into credential access patterns. This vulnerability demonstrates the critical importance of proper permission validation in security-critical components and highlights the need for regular security assessments of third-party plugins in enterprise automation environments.