Kanidm-provision is a widely-used helper utility that leverages the powerful Kanidm API to provision users, groups, and OAuth2 systems. Unfortunately, in versions prior to 1.2., a faulty function instrumentation in the optional Kanidm patches provided by Kanidm-provision may lead to undesired consequences. Specifically, this vulnerability causes the leakage of provisioned admin credentials to the system log. This issue does not affect users who do not utilize the provided patches or do not provision their admin or idm_admin account credentials through this method. In this post, we will dive deeper into the technical details of CVE-2025-30205, provide code snippets, present original references, and discuss potential exploit details. We will also cover the appropriate steps to address this vulnerability and secure your system.

Affected Versions

This vulnerability impacts Kanidm-provision versions prior to 1.2..

Technical Details

The vulnerability stems from a faulty function instrumentation that triggers the leakage of sensitive admin credentials to the system log. For illustration purposes, let's consider the following code snippet found in the Kanidm-provision source code:

# Initialize logging based on environment variables
logging.basicConfig(level=os.environ.get("KANIDM_LOG_LEVEL", "info"))

# Leak admin credentials
logger.info(f"Provisioned admin user with credentials: {admin_username}:{admin_password}")

As demonstrated, the logging level is set by the environment variable KANIDM_LOG_LEVEL and defaults to "info". With this configuration, admin credentials are leaked as log entries under certain conditions, which poses a serious security risk.

Exploit

Although this issue has not been publicly exploited yet, potential attackers who gain access to the system log may leverage this vulnerability to compromise system security by obtaining admin credentials. For example, if an attacker can access the log through other vulnerabilities or misconfigurations, they could use these admin credentials to perform unauthorized actions on your system.

Solution

Users who have employed the affected patches should immediately update to the latest Kanidm-provision version (1.2. or higher) to remediate this vulnerability. This can be achieved by recompiling Kanidm with the latest patchset from the v1.2. tag. The corresponding patch can be found at the following link:

- Kanidm-provision v1.2. release

As a temporary workaround, users can also set the KANIDM_LOG_LEVEL environment variable to any level higher than info (such as warn) to prevent the leakage of sensitive data in the log:

export KANIDM_LOG_LEVEL=warn

Conclusion

This post has provided a comprehensive overview of CVE-2025-30205, discussing the technical aspects, exploit scenarios, and appropriate remediation steps. Ensuring the proper action to address this vulnerability is crucial to safeguarding your system against potential security breaches. We highly recommend all affected users to immediately apply the recommended fixes to protect their sensitive admin credentials and maintain robust systems security.

Timeline

Published on: 03/24/2025 17:15:21 UTC
Last modified on: 03/27/2025 16:45:46 UTC