CVE-2023-6569: H2o External Control Of File Name Vulnerability

CRITICAL
Advisory Identifier: GHSA-gqrq-j6pm-98c2
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CVSS 9.3
CWE-610 CWE-73
Published
Advisory Summary

CVE-2023-6569 is a CRITICAL (CVSS 9.3) external control of file name vulnerability (CWE-610: Externally Controlled Reference to a Resource in Another Sphere) affecting H2o libraries in the PyPI ecosystem. The issue involves external control of file name or path in h2oai/h2o-3. Remediation is available by upgrading affected packages to version 3.46.0.1.

CVE-2023-6569 at a Glance

CVE Identifier CVE-2023-6569
GHSA Identifier GHSA-gqrq-j6pm-98c2
Severity CRITICAL
CVSS v3.1 Base Score 9.3
CWE Classification CWE-610: Externally Controlled Reference to a Resource in Another Sphere
Affected Product H2o
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 9.3

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:N/I:L/A:H).

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 None (C:N)
Integrity Low (I:L)
Availability High (A:H)

How to Fix CVE-2023-6569

To remediate this vulnerability, upgrade all affected H2o dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

h2o fixed: 3.46.0.1 
pip install h2o>=3.46.0.1
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 h2o

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2023-6569, inspect your installed packages using pip:

pip show h2o

Analyze the terminal output to locate any version of H2o in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.46.0.1), your application is affected.

Note: The pip show h2o command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-610: Externally Controlled Reference to a Resource in Another Sphere, where the product uses an externally controlled name or reference that resolves to a resource that is outside of the intended control sphere. In H2o, 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

Remote unauthenticated attackers can overwrite arbitrary server files with attacker-controllable data. The data that the attacker can control is not entirely arbitrary. h2o writes a CSV/XLS/etc file to disk, so the attacker data is wrapped in quotations and starts with "C1", if they're exporting as CSV.

CVE-2023-6569 Affected H2o Versions

1 component(s)
Fixed Versions:
3.46.0.1
Product / Package Ecosystem Affected Versions Fixed Version
h2o
pypi/h2o
PyPI
< 3.46.0.1
3.46.0.1

References

NVD — CVE-2023-6569 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-6569
Security Fix Commit FIX COMMIT
https://github.com/h2oai/h2o-3/commit/e8884f5187eb81311877c5f0dd4d6d9c70f33d78
H2o Source Repository REPOSITORY
https://github.com/h2oai/h2o-3
huntr.com/bounties/a5d003dc-c... WEB
https://huntr.com/bounties/a5d003dc-c23e-4c98-8dcf-35ba9252fa3c

Frequently Asked Questions

What is CVE-2023-6569?
CVE-2023-6569 is a security vulnerability in H2o involving External Control of File Name or Path in h2oai/h2o-3 under CWE-610: Externally Controlled Reference to a Resource in Another Sphere.
Which H2o versions are affected?
Affected versions include releases prior to 3.46.0.1 across affected packages: h2o.
What version fixes CVE-2023-6569?
Upgrading to 3.46.0.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is h2o affected?
Yes, h2o is affected in releases prior to 3.46.0.1. Upgrade your dependency to 3.46.0.1 or later.
What is the CVSS score of CVE-2023-6569?
CVE-2023-6569 has a CVSS v3.1 base score of 9.3 (CRITICAL) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H.
What CWE is associated with CVE-2023-6569?
CVE-2023-6569 is classified under CWE-610: Externally Controlled Reference to a Resource in Another Sphere (The product uses an externally controlled name or reference that resolves to a resource that is outside of the intended control sphere.).
How can I check PyPI dependencies for CVE-2023-6569?
Run the dependency tree command: 'pip show h2o'. 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-gqrq-j6pm-98c2",
  "modified" : "2026-04-15T16:08:45Z",
  "published" : "2023-12-14T15:30:22Z",
  "aliases" : [ "CVE-2023-6569" ],
  "summary" : "External Control of File Name or Path in h2oai/h2o-3",
  "details" : "Remote unauthenticated attackers can overwrite arbitrary server files with attacker-controllable data. The data that the attacker can control is not entirely arbitrary. h2o writes a CSV/XLS/etc file to disk, so the attacker data is wrapped in quotations and starts with \"C1\", if they're exporting as CSV.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "h2o"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.46.0.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-6569"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/h2oai/h2o-3/commit/e8884f5187eb81311877c5f0dd4d6d9c70f33d78"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/h2oai/h2o-3"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.com/bounties/a5d003dc-c23e-4c98-8dcf-35ba9252fa3c"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-610", "CWE-73" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-12-15T03:12:43Z",
    "nvd_published_at" : "2023-12-14T13:15:55Z"
  }
}