CVE-2023-30847CWE-824

H2O vulnerable to read from uninitialized pointer in the reverse proxy handler

High · published April 27, 2023

CVSS v3.1
8.2
EPSS
1%
Percentile
59.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00902 · 59.4th percentile
Weakness
CWE-824 · Access of Uninitialized Pointer
Published
2023-04-27T14:08Z
EPSS history
Timeline
  • 27 APR 14:08Z
    H2O vulnerable to read from uninitialized pointer in the reverse proxy handler
    cvelistv5