CVE-2023-6974: Mlflow MLflow Server-Side Request Forgery (SSRF) Vulnerability

CRITICAL
Advisory Identifier: GHSA-59v3-898r-qwhj
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CVSS 9.8
CWE-918
Published
Advisory Summary

CVE-2023-6974 is a CRITICAL (CVSS 9.8) mlflow server-side request forgery (ssrf) vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Mlflow libraries in the PyPI ecosystem. The issue involves mlflow server-side request forgery (ssrf). Remediation is available by upgrading affected packages to version 2.9.2.

CVE-2023-6974 at a Glance

CVE Identifier CVE-2023-6974
GHSA Identifier GHSA-59v3-898r-qwhj
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Mlflow
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

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

How to Fix CVE-2023-6974

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: 2.9.2 
pip install mlflow>=2.9.2
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-2023-6974, 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 2.9.2), 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-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. 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

A malicious user could use this issue to access internal HTTP(s) servers and in the worst case (ie: aws instance) it could be abused to get a remote code execution on the victim machine.

CVE-2023-6974 Affected Mlflow Versions

1 component(s)
Fixed Versions:
2.9.2
Product / Package Ecosystem Affected Versions Fixed Version
mlflow
pypi/mlflow
PyPI
< 2.9.2
2.9.2

References

NVD — CVE-2023-6974 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-6974
Security Fix Commit FIX COMMIT
https://github.com/mlflow/mlflow/commit/8174250f83352a04c2d42079f414759060458555
Mlflow Source Repository REPOSITORY
https://github.com/mlflow/mlflow
huntr.com/bounties/438b0524-d... WEB
https://huntr.com/bounties/438b0524-da0e-4d08-976a-6f270c688393

Frequently Asked Questions

What is CVE-2023-6974?
CVE-2023-6974 is a security vulnerability in Mlflow involving MLflow Server-Side Request Forgery (SSRF) under CWE-918: Server-Side Request Forgery (SSRF).
Which Mlflow versions are affected?
Affected versions include releases prior to 2.9.2 across affected packages: mlflow.
What version fixes CVE-2023-6974?
Upgrading to 2.9.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mlflow affected?
Yes, mlflow is affected in releases prior to 2.9.2. Upgrade your dependency to 2.9.2 or later.
What is the CVSS score of CVE-2023-6974?
CVE-2023-6974 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2023-6974?
CVE-2023-6974 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check PyPI dependencies for CVE-2023-6974?
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-59v3-898r-qwhj",
  "modified" : "2024-01-02T14:53:37Z",
  "published" : "2023-12-20T06:30:25Z",
  "aliases" : [ "CVE-2023-6974" ],
  "summary" : "MLflow Server-Side Request Forgery (SSRF)",
  "details" : "A malicious user could use this issue to access internal HTTP(s) servers and in the worst case (ie: aws instance) it could be abused to get a remote code execution on the victim machine.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "mlflow"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.9.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-6974"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mlflow/mlflow/commit/8174250f83352a04c2d42079f414759060458555"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mlflow/mlflow"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.com/bounties/438b0524-da0e-4d08-976a-6f270c688393"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-12-20T20:36:02Z",
    "nvd_published_at" : "2023-12-20T06:15:45Z"
  }
}