Vulnerabilities > CVE-2023-30847 - Access of Uninitialized Pointer vulnerability in Dena H2O

CVSS 8.2 - HIGH

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

LOW

Integrity impact

NONE

Availability impact

HIGH

network

low complexity

dena

CWE-824

NVD

Published: 2023-04-27

Updated: 2023-05-09

Summary

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.

Vulnerable Configurations

Part	Description	Count
Application	Dena Dena H2O 0.9.0 Dena H2O 0.9.1 Dena H2O 0.9.2 Dena H2O 1.0.0 Dena H2O 1.0.1 Dena H2O 1.1.0 Dena H2O 1.1.1 Dena H2O 1.2.0 Dena H2O 1.3.0 Dena H2O 1.3.1 Dena H2O 1.4.0 Dena H2O 1.4.1 Dena H2O 1.4.2 Dena H2O 1.4.3 Dena H2O 1.4.4 Dena H2O 1.4.5 Dena H2O 1.5.0 Dena H2O 1.5.1 Dena H2O 1.5.2 Dena H2O 1.5.3 Dena H2O 1.5.4 Dena H2O 1.5.5 Dena H2O 1.6.0 Dena H2O 1.6.1 Dena H2O 1.6.2 Dena H2O 1.6.3 Dena H2O 1.7.0 Dena H2O 1.7.1 Dena H2O 1.7.2 Dena H2O 1.7.3 Dena H2O 2.0.0 Dena H2O 2.0.1 Dena H2O 2.0.2 Dena H2O 2.0.3 Dena H2O 2.0.4 Dena H2O 2.0.5 Dena H2O 2.0.6 Dena H2O 2.1.0 Dena H2O 2.2.0 Dena H2O 2.2.1 Dena H2O 2.2.2 Dena H2O 2.2.3 Dena H2O 2.2.4 Dena H2O 2.2.5 Dena H2O 2.2.6 Dena H2O 2.3.0	71

Common Weakness Enumeration (CWE)

CWE-824 - Access of Uninitialized Pointer

Summary

Vulnerable Configurations

Common Weakness Enumeration (CWE)

References