Is CVE-2023-30847 actively exploited?

CVE-2023-30847 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2023-30847?

CVE-2023-30847 has a CVSS score of 8.2 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.

How do I patch CVE-2023-30847?

Patch guidance is available from dena security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2023-30847.

Which products are affected by CVE-2023-30847?

3 products: dena h2o, dena h2o, dena h2o.

Fix CVE-2023-30847 - HIGH dena h2o

Description

H2O is an HTTP server. In versions 2.3.0-beta2 and prior, when the reverse proxy handler tries to processes a certain type of invalid HTTP request, it tries to build an upstream URL by reading from uninitialized pointer. This behavior can lead to crashes or leak of information to back end HTTP servers. Pull request number 3229 fixes the issue. The pull request has been merged to the `master` branch in commit f010336. Users should upgrade to commit f010336 or later.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: low
Integrity: none
Availability: high
Weaknesses: CWE-824

Metadata

Primary Vendor: DENA
Published: 4/27/2023
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

dena : h2odena : h2odena : h2o

Remediation Guidance

Executive Summary

Cite this page

CVE-2023-30847. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2023-30847

View on NIST NVD

CVE-2023-30847 vulnerability