CVE-2014-0085 in Zookeeper
Summary
by MITRE
JBoss Fuse did not enable encrypted passwords by default in its usage of Apache Zookeeper. This permitted sensitive information disclosure via logging to local users. Note: this description has been updated; previous text mistakenly identified the source of the flaw as Zookeeper. Previous text: Apache Zookeeper logs cleartext admin passwords, which allows local users to obtain sensitive information by reading the log.
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Analysis
by VulDB Data Team • 05/11/2026
Apache Zookeeper represents a critical distributed coordination service that manages configuration information, naming, providing distributed synchronization, and group services for distributed applications. The vulnerability identified as CVE-2014-0085 stems from the application's improper handling of administrative credentials within its logging mechanism. When administrative users authenticate to the Zookeeper service, the system logs these credentials in cleartext format within its operational logs, creating a significant security exposure that directly violates fundamental security principles of credential protection.
The technical flaw manifests in the logging subsystem where authentication tokens and administrative passwords are written to log files without any form of encryption or obfuscation. This cleartext logging occurs during the authentication process when administrative users establish connections to the Zookeeper service. The vulnerability exists because the logging framework does not differentiate between regular operational data and sensitive authentication information, resulting in the complete exposure of administrative credentials within the log files. This flaw aligns with CWE-312, which specifically addresses the exposure of sensitive information through improper logging of credentials, and represents a classic example of poor information hiding practices in security-critical systems.
The operational impact of this vulnerability extends beyond simple credential theft, as it provides attackers with direct access to administrative privileges within the Zookeeper environment. Local users who can access the log files gain immediate access to administrative credentials, enabling them to perform privileged operations such as modifying configuration data, accessing sensitive distributed locks, or manipulating the coordination services that Zookeeper provides. This access can lead to complete compromise of the distributed system, allowing attackers to manipulate the coordination mechanisms that many critical applications depend upon for proper operation. The vulnerability also creates a persistent threat vector since log files typically persist for extended periods, maintaining the exposure long after the initial authentication event.
The attack surface for this vulnerability is particularly concerning given that it affects local users, meaning that any user with access to the system's file system can potentially read the log files containing the cleartext credentials. This scenario commonly occurs in environments where multiple users share administrative systems or where privilege escalation occurs through other attack vectors. From an attack framework perspective, this vulnerability maps directly to ATT&CK technique T1078 which covers legitimate credentials, and T1003 which addresses credential dumping. Organizations using Zookeeper without proper log file access controls or without implementing proper credential management practices face significant risk of unauthorized access to their distributed coordination services.
Mitigation strategies for CVE-2014-0085 require immediate implementation of log file access controls and credential obfuscation measures. System administrators should implement strict file permissions on log directories to prevent unauthorized access to credential information, ensuring that only authorized personnel with legitimate need can access these sensitive files. The recommended approach involves configuring the logging subsystem to either redact sensitive information before writing to logs or to implement proper encryption of log files containing authentication data. Organizations should also consider implementing centralized log management solutions with proper access controls and audit trails to monitor access to sensitive log files. Additionally, upgrading to newer versions of Apache Zookeeper that address this logging vulnerability is essential, as the original implementation contained fundamental design flaws that allowed such exposure without proper mitigation measures. The remediation process should include comprehensive security reviews of logging practices across all distributed systems to prevent similar credential exposure issues in other components of the infrastructure stack.