CVE-2018-1000412 in Jira Plugin
Summary
by MITRE
An improper authorization vulnerability exists in Jenkins Jira Plugin 3.0.1 and earlier in JiraSite.java that allows attackers with Overall/Read access to have Jenkins connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing credentials stored in Jenkins.
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Analysis
by VulDB Data Team • 04/27/2020
The vulnerability described in CVE-2018-1000412 represents a critical authorization flaw within the Jenkins Jira Plugin version 3.0.1 and earlier. This issue stems from inadequate validation of user permissions within the JiraSite.java component, which allows unauthorized access to Jenkins' credential management systems. The vulnerability specifically affects systems where attackers possess only Overall/Read access rights, yet can exploit this flaw to escalate their privileges and gain access to sensitive credential information stored within Jenkins.
The technical implementation of this vulnerability occurs through improper authorization checks in the plugin's JiraSite.java file. When an attacker with limited read access attempts to interact with Jira integration features, the system fails to properly validate whether the user should be permitted to specify arbitrary URLs and credentials. This flaw enables attackers to craft malicious requests that force Jenkins to establish connections to attacker-controlled endpoints using stored credential identifiers. The vulnerability essentially allows attackers to bypass normal access controls and leverage existing credential storage mechanisms to capture sensitive authentication data.
From an operational impact perspective, this vulnerability creates significant risk for Jenkins environments that integrate with Jira systems. Organizations using affected plugin versions face potential credential theft, which could lead to unauthorized access to Jira instances, other systems that rely on the stolen credentials, and potentially broader network access. The attack vector is particularly concerning because it requires only minimal privileges to exploit, making it accessible to users who should normally have limited access to the Jenkins system. This could result in unauthorized data access, system compromise, and potential lateral movement within network environments where Jenkins credentials are used for authentication to other services.
The vulnerability aligns with CWE-285, which addresses improper authorization issues in software systems, and maps to ATT&CK technique T1550.001 for use of valid credentials. Organizations should immediately upgrade to Jenkins Jira Plugin version 3.0.2 or later to address this vulnerability. Additional mitigations include implementing network segmentation to restrict Jenkins access to Jira systems, monitoring for unusual outbound connections from Jenkins servers, and conducting regular audits of stored credentials. Security teams should also consider implementing role-based access controls that limit the scope of read-only users and ensure that credential storage is properly isolated from unauthorized access vectors. The vulnerability demonstrates the importance of comprehensive authorization validation and the potential for seemingly minor permission issues to create significant security risks in enterprise automation platforms.