CVE-2023-43622

2023-10-2307:15:11

CWE-400

[email protected]

web.nvd.nist.gov

325

cve

apache http server

http/2

security

vulnerability

update

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.3 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

27.5%

JSON

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

Vulners

NVD

Node

apacheapache_http_serverRange≤2.4.57

CPENameOperatorVersion
apache:http_serverapache http serverlt2.4.58

CPE	Name	Operator	Version
apache:http_server	apache http server	lt	2.4.58

CNA Affected

[
  {
    "defaultStatus": "unaffected",
    "product": "Apache HTTP Server",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThanOrEqual": "2.4.57",
        "status": "affected",
        "version": "2.4.55",
        "versionType": "semver"
      }
    ]
  }
]