#VU82247 Resource management error in Apache HTTP Server - CVE-2023-43622
Published: October 19, 2023 / Updated: January 4, 2026
Vulnerability identifier: #VU82247
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2023-43622
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerable software:
Apache HTTP Server
Apache HTTP Server
Software vendor:
Apache Foundation
Apache Foundation
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the server when processing HTTP/2 connections with window size of 0. A remote attacker can exhaust available workers on the server and perform a denial of service (DoS) attack.
Remediation
Install updates from vendor's website.