CVE-2023-1177: Path Traversal: '\..\filename' in mlflow/mlflow
Impact
Users of the MLflow Open Source Project who are hosting the MLflow Model Registry using the mlflow server or mlflow ui commands using an MLflow version older than MLflow 2.2.1 may be vulnerable to a remote file access exploit if they are not limiting who can query their server (for example, by using a cloud VPC, an IP allowlist for inbound requests, or authentication / authorization middleware).
This issue only affects users and integrations that run the mlflow server and mlflow ui commands. Integrations that do not make use of mlflow server or mlflow ui are unaffected; for example, the Databricks Managed MLflow product and MLflow on Azure Machine Learning do not make use of these commands and are not impacted by these vulnerabilities in any way.
The vulnerability detailed in https://nvd.nist.gov/vuln/detail/CVE-2023-1177 enables an actor to download arbitrary files unrelated to MLflow from the host server, including any files stored in remote locations to which the host server has access.
Patches This vulnerability has been patched in MLflow 2.2.1, which was released to PyPI on March 2nd, 2023. If you are using mlflow server or mlflow ui with the MLflow Model Registry, we recommend upgrading to MLflow 2.2.1 as soon as possible.
Workarounds If you are using the MLflow open source mlflow server or mlflow ui commands, we strongly recommend limiting who can access your MLflow Model Registry and MLflow Tracking servers using a cloud VPC, an IP allowlist for inbound requests, authentication / authorization middleware, or another access restriction mechanism of your choosing.
If you are using the MLflow open source mlflow server or mlflow ui commands, we also strongly recommend limiting the remote files to which your MLflow Model Registry and MLflow Tracking servers have access. For example, if your MLflow Model Registry or MLflow Tracking server uses cloud-hosted blob storage for MLflow artifacts, make sure to restrict the scope of your server's cloud credentials such that it can only access files and directories related to MLflow.
References More information about the vulnerability is available at https://nvd.nist.gov/vuln/detail/CVE-2023-1177.
Other sources
Path Traversal: '\..\filename' in GitHub repository mlflow/mlflow prior to 2.2.1.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the vulnerability ID for this MLflow vulnerability?
The vulnerability ID for this MLflow vulnerability is CVE-2023-1177.
What is the severity of CVE-2023-1177?
The severity of CVE-2023-1177 is critical with a severity value of 9.8.
How does CVE-2023-1177 impact MLflow users?
CVE-2023-1177 may make MLflow users vulnerable to a remote file access exploit if they are hosting the MLflow Model Registry using an MLflow version older than 2.2.1 and not limiting who can query their server.
How can MLflow users fix the vulnerability CVE-2023-1177?
To fix the vulnerability CVE-2023-1177, MLflow users should update their MLflow version to 2.2.1 or newer.
What is the Common Weakness Enumeration (CWE) ID for CVE-2023-1177?
The Common Weakness Enumeration (CWE) ID for CVE-2023-1177 is CWE-22 and CWE-29.