CVE-2018-1000105 in Gerrit Trigger Plugin
Summary
by MITRE
An improper authorization vulnerability exists in Jenkins Gerrit Trigger Plugin 2.27.4 and earlier in GerritManagement.java, GerritServer.java, and PluginImpl.java that allows an attacker with Overall/Read access to retrieve some configuration information about Gerrit in Jenkins.
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Analysis
by VulDB Data Team • 07/16/2020
The vulnerability identified as CVE-2018-1000105 represents a critical authorization flaw within the Jenkins Gerrit Trigger Plugin ecosystem. This issue affects versions 2.27.4 and earlier, where the plugin fails to properly validate user permissions when accessing sensitive configuration data. The flaw manifests in three key Java classes: GerritManagement.java, GerritServer.java, and PluginImpl.java, which together form the core configuration management components of the Gerrit integration. The vulnerability stems from inadequate access control mechanisms that allow unauthorized users to bypass normal permission checks and access restricted information.
The technical implementation of this flaw involves insufficient input validation and privilege checking within the plugin's configuration retrieval methods. When a user with only Overall/Read access attempts to interact with Gerrit configuration data, the system fails to properly enforce authorization boundaries. This misconfiguration allows attackers to extract sensitive information about Gerrit server configurations, potentially including connection parameters, authentication details, and other system-specific data that could aid in further exploitation. The vulnerability operates at the application layer and leverages the existing Jenkins permission model to escalate access privileges.
From an operational perspective, this vulnerability poses significant risks to Jenkins environments that integrate with Gerrit for continuous integration workflows. Attackers who gain access to configuration information can potentially map out the entire Gerrit infrastructure, identify authentication mechanisms, and discover potential attack vectors for privilege escalation. The impact extends beyond simple information disclosure as this data could be used to craft targeted attacks against the underlying Gerrit server or to identify other interconnected systems. The vulnerability particularly affects organizations that rely on Jenkins for automated code review and deployment processes, where the exposure of configuration details could compromise entire CI/CD pipelines.
The flaw aligns with CWE-284, which addresses improper access control issues, and demonstrates characteristics consistent with ATT&CK technique T1213.002, focusing on data from information repositories. Organizations should implement immediate mitigations including upgrading to Jenkins Gerrit Trigger Plugin version 2.27.5 or later, which contains the necessary authorization fixes. Additionally, administrators should review and tighten Jenkins permission configurations, ensuring that users with Overall/Read access cannot retrieve sensitive configuration information. Network segmentation and monitoring of unusual configuration access patterns can provide additional layers of defense. The vulnerability underscores the importance of proper authorization checking in plugin development and highlights the need for regular security assessments of integrated systems to prevent similar issues from compromising enterprise security postures.