CVEvulnerability

CVE-2023-43622

7.5 HIGH Published 2023-10-23 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2023-10-23
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-400

Description

An attacker, opening a HTTP/2 connection with an initial window size of 0, was able to block handling of that connection indefinitely in Apache HTTP Server. This could be used to exhaust worker resources in the server, similar to the well known "slow loris" attack pattern. This has been fixed in version 2.4.58, so that such connection are terminated properly after the configured connection timeout. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.57. Users are recommended to upgrade to version 2.4.58, which fixes the issue.

Affected configurations

• apache http server (>= 2.4.55 < 2.4.58)

Related

Weakness · CWE (1)

  • CWE-400 Uncontrolled Resource Consumption weakness

References