CVE-2023-6015: Mlflow MLflow Allowed Arbitrary Files To Vulnerability

CRITICAL
Advisory Identifier: GHSA-f798-qm4r-23r5
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CVSS 10.0
CWE-22
Published
Advisory Summary

CVE-2023-6015 is a CRITICAL (CVSS 10.0) mlflow allowed arbitrary files to vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Mlflow libraries in the PyPI ecosystem. The issue involves mlflow allowed arbitrary files to be put onto the server. Remediation is available by upgrading affected packages to version 2.8.1.

CVE-2023-6015 at a Glance

CVE Identifier CVE-2023-6015
GHSA Identifier GHSA-f798-qm4r-23r5
Severity CRITICAL
CVSS v3.1 Base Score 10.0
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Mlflow
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 10.0

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2023-6015

To remediate this vulnerability, upgrade all affected Mlflow dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

mlflow fixed: 2.8.1 
pip install mlflow>=2.8.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show mlflow

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2023-6015, inspect your installed packages using pip:

pip show mlflow

Analyze the terminal output to locate any version of Mlflow in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.8.1), your application is affected.

Note: The pip show mlflow command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Mlflow, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

MLflow allowed arbitrary files to be PUT onto the server.

CVE-2023-6015 Affected Mlflow Versions

1 component(s)
Fixed Versions:
2.8.1
Product / Package Ecosystem Affected Versions Fixed Version
mlflow
pypi/mlflow
PyPI
< 2.8.1
2.8.1

References

NVD — CVE-2023-6015 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-6015
Mlflow Source Repository REPOSITORY
https://github.com/mlflow/mlflow/pull/10330
Security Fix Commit FIX COMMIT
https://github.com/mlflow/mlflow/commit/cf83dad4df26dd4a850622fe8a51ccab1471a5e7
Mlflow Source Repository REPOSITORY
https://github.com/mlflow/mlflow
huntr.com/bounties/43e6fb72-6... WEB
https://huntr.com/bounties/43e6fb72-676e-4670-a225-15d6836f65d3

Frequently Asked Questions

What is CVE-2023-6015?
CVE-2023-6015 is a security vulnerability in Mlflow involving MLflow allowed arbitrary files to be PUT onto the server under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Mlflow versions are affected?
Affected versions include releases prior to 2.8.1 across affected packages: mlflow.
What version fixes CVE-2023-6015?
Upgrading to 2.8.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mlflow affected?
Yes, mlflow is affected in releases prior to 2.8.1. Upgrade your dependency to 2.8.1 or later.
What is the CVSS score of CVE-2023-6015?
CVE-2023-6015 has a CVSS v3.1 base score of 10.0 (CRITICAL) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.
What CWE is associated with CVE-2023-6015?
CVE-2023-6015 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check PyPI dependencies for CVE-2023-6015?
Run the dependency tree command: 'pip show mlflow'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-f798-qm4r-23r5",
  "modified" : "2023-11-16T21:25:18Z",
  "published" : "2023-11-16T18:30:31Z",
  "aliases" : [ "CVE-2023-6015" ],
  "summary" : "MLflow allowed arbitrary files to be PUT onto the server",
  "details" : "MLflow allowed arbitrary files to be PUT onto the server.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "mlflow"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.8.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-6015"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mlflow/mlflow/pull/10330"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mlflow/mlflow/commit/cf83dad4df26dd4a850622fe8a51ccab1471a5e7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mlflow/mlflow"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.com/bounties/43e6fb72-676e-4670-a225-15d6836f65d3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-11-16T21:25:18Z",
    "nvd_published_at" : "2023-11-16T16:15:34Z"
  }
}