CVE-2019-10285 in Minio Storage Plugin
Summary
by MITRE
Jenkins Minio Storage Plugin stores credentials unencrypted in its global configuration file on the Jenkins master where they can be viewed by users with access to the master file system.
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Analysis
by VulDB Data Team • 08/25/2023
The Jenkins Minio Storage Plugin vulnerability represents a critical security flaw that undermines the confidentiality of authentication credentials within the Jenkins continuous integration platform. This vulnerability specifically affects the plugin's handling of sensitive information during the global configuration process, creating an exploitable condition that allows unauthorized access to stored credentials. The issue stems from the plugin's failure to implement proper encryption mechanisms when persisting credential data to disk, leaving sensitive authentication information in plaintext format within the Jenkins master configuration files.
The technical implementation flaw resides in the plugin's configuration management approach where user credentials are serialized and stored without encryption in the Jenkins master's file system. This design decision violates fundamental security principles and creates a persistent exposure that remains active as long as the Jenkins instance operates. The vulnerability is classified as a weakness in data protection mechanisms, aligning with CWE-312 (Sensitive Data Exposure) and CWE-522 (Insufficiently Protected Credentials). Attackers with file system access to the Jenkins master can directly read these configuration files and extract stored credentials, potentially gaining access to Minio storage systems and associated resources.
The operational impact of this vulnerability extends beyond simple credential theft, as it creates a persistent attack surface that can be exploited by both internal and external threat actors. Users with minimal privileges to access the Jenkins master file system can retrieve stored credentials, potentially enabling lateral movement within the organization's infrastructure. This vulnerability directly impacts the principle of least privilege and can lead to unauthorized access to cloud storage resources, data exfiltration, and potential compromise of downstream systems that rely on the Minio storage. The risk is particularly elevated in environments where Jenkins master file systems are accessible to multiple users or where administrative privileges are not properly restricted.
Mitigation strategies for this vulnerability should focus on both immediate remediation and long-term architectural improvements. Organizations should immediately upgrade to patched versions of the Jenkins Minio Storage Plugin where encryption of stored credentials is implemented. System administrators should also implement strict file system access controls and privilege management to limit access to Jenkins master configuration files. The solution aligns with ATT&CK technique T1552.001 (Credentials in Files) and emphasizes the importance of secure configuration management practices. Additionally, organizations should consider implementing centralized credential management solutions and regular security audits of Jenkins configurations to prevent similar vulnerabilities from emerging in other plugins or components of the continuous integration infrastructure.