CVE-2024-5979: H2o H2o Vulnerable To Unexpected POST Vulnerability

HIGH
Advisory Identifier: GHSA-58m3-rcvp-f9ww
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CVSS 7.5
CWE-400 CWE-94
Published
Advisory Summary

CVE-2024-5979 is a HIGH (CVSS 7.5) h2o vulnerable to unexpected post vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting H2o libraries in the PyPI ecosystem. The issue involves h2o vulnerable to unexpected post request shutting down server. Remediation is available in the latest vendor maintenance releases.

CVE-2024-5979 at a Glance

CVE Identifier CVE-2024-5979
GHSA Identifier GHSA-58m3-rcvp-f9ww
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product H2o
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:U/C:N/I:N/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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2024-5979

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: Latest secure release 
pip install h2o>=Latest secure release
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-2024-5979, 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 the patched release), 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-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. 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

In h2oai/h2o-3 version 3.46.0, the `run_tool` command in the `rapids` component allows the `main` function of any class under the `water.tools` namespace to be called. One such class, `MojoConvertTool`, crashes the server when invoked with an invalid argument, causing a denial of service.

CVE-2024-5979 Affected H2o Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
h2o
pypi/h2o
PyPI
≤ 3.46.0

References

NVD — CVE-2024-5979 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-5979
Security Fix Commit FIX COMMIT
https://github.com/h2oai/h2o-3/commit/d0899f8e0f7a584b60405a65b1d7b439aaaa55a5
H2o Source Repository REPOSITORY
https://github.com/h2oai/h2o-3
huntr.com/bounties/d80a2139-f... WEB
https://huntr.com/bounties/d80a2139-fc03-44b7-b739-de41e323b458

Frequently Asked Questions

What is CVE-2024-5979?
CVE-2024-5979 is a security vulnerability in H2o involving h2o vulnerable to unexpected POST request shutting down server under CWE-400: Uncontrolled Resource Consumption.
Which H2o versions are affected?
Affected versions include releases prior to current release patches across affected packages: h2o.
What version fixes CVE-2024-5979?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is h2o affected?
Yes, h2o is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2024-5979?
CVE-2024-5979 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2024-5979?
CVE-2024-5979 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check PyPI dependencies for CVE-2024-5979?
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-58m3-rcvp-f9ww",
  "modified" : "2025-10-15T15:48:42Z",
  "published" : "2024-06-27T21:32:08Z",
  "aliases" : [ "CVE-2024-5979" ],
  "summary" : "h2o vulnerable to unexpected POST request shutting down server",
  "details" : "In h2oai/h2o-3 version 3.46.0, the `run_tool` command in the `rapids` component allows the `main` function of any class under the `water.tools` namespace to be called. One such class, `MojoConvertTool`, crashes the server when invoked with an invalid argument, causing a denial of service.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "h2o"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "3.46.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-5979"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/h2oai/h2o-3/commit/d0899f8e0f7a584b60405a65b1d7b439aaaa55a5"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/h2oai/h2o-3"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.com/bounties/d80a2139-fc03-44b7-b739-de41e323b458"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-94" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-06-28T21:09:00Z",
    "nvd_published_at" : "2024-06-27T19:15:18Z"
  }
}