CVE-2023-30847 HIGH

CVE-2023-30847: H2O vulnerable to read from uninitialized pointer in the reverse proxy handler

Vendor H2O
Product h2o
Weakness CWE-824
Published April 27, 2023
Last update January 30, 2025
View on NVD All CVEs

CVSS base score

8.2/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 27, 2023 CVE published
January 30, 2025 Record updated