Apache 2.4.x < 2.4.35 Denial of Service

Medium Web Application Scanning Plugin ID 98916

Synopsis

Apache 2.4.x < 2.4.35 Denial of Service

Description

According to its banner, the version of Apache running on the remote host is 2.4.x prior to 2.4.35. By sending continuous SETTINGS frames of maximum size an ongoing HTTP/2 connection could be kept busy and would never time out. This can be abused for a DoS on the server. This only affect a server that has enabled the h2 protocol.

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Apache version 2.4.35 or later.

See Also

https://archive.apache.org/dist/httpd/CHANGES_2.4.35

https://httpd.apache.org/security/vulnerabilities_24.html#2.4.35

Plugin Details

Severity: Medium

ID: 98916

Type: remote

Published: 2019/01/31

Updated: 2020/02/18

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

CVSS v3.0

Base Score: 5.9

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Vulnerability Information

CPE: cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

Exploit Available: false

Patch Publication Date: 2018/09/25

Vulnerability Publication Date: 2018/09/25

Reference Information

CVE: CVE-2018-11763

BID: 105414

CWE: 400

WASC: Denial of Service

OWASP: 2013-A9, 2017-A9

OWASP_API: 2019-API7