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Vulnerability of Apache httpd: denial of service via HTTP/2

Synthesis of the vulnerability 

An attacker can generate an overload via the HTTP/2 experimental module of Apache httpd, in order to trigger a denial of service.
Impacted systems: Apache httpd, Mac OS X, Fedora, HP-UX, openSUSE Leap, Slackware, TrendMicro ServerProtect.
Severity of this alert: 2/4.
Creation date: 05/12/2016.
Références of this alert: 1117414, APPLE-SA-2017-09-25-1, CVE-2016-8740, FEDORA-2016-260d22944d, FEDORA-2016-b39fedec11, HPESBUX03725, HT207615, HT208144, HT208221, openSUSE-SU-2017:0297-1, SSA:2016-358-01, VIGILANCE-VUL-21263.

Description of the vulnerability 

An attacker can generate an overload via the HTTP/2 experimental module of Apache httpd, in order to trigger a denial of service.
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This weakness bulletin impacts software or systems such as Apache httpd, Mac OS X, Fedora, HP-UX, openSUSE Leap, Slackware, TrendMicro ServerProtect.

Our Vigil@nce team determined that the severity of this computer weakness is medium.

The trust level is of type confirmed by the editor, with an origin of internet client.

An attacker with a expert ability can exploit this vulnerability announce.

Solutions for this threat 

Apache httpd: version 2.4.25.
The version 2.4.25 is fixed:
  http://apache.mediamirrors.org//httpd/httpd-2.4.25.tar.bz2

Apache httpd: patch for HTTP/2.
A patch is indicated in information sources.
A workaround is to disable the experimental HTTP/2 module.

Apple macOS 10.12: version Security Update 2017-001.
The version Security Update 2017-001 is fixed:
  https://support.apple.com/

Apple macOS: version 10.13.
The version 10.13 is fixed:
  https://www.apple.com/support/downloads/

Apple macOS: version 10.13.1.
The version 10.13.1 is fixed:
  https://support.apple.com/

Apple MacOS X 10.11: version Security Update 2017-004.
The version Security Update 2017-004 is fixed:
  https://support.apple.com/

Apple Mac OS X: version 10.12.4.
The version 10.12.4 is fixed.

Fedora: new httpd packages.
New packages are available:
  Fedora 24: httpd 2.4.23-5.fc24
  Fedora 25: httpd 2.4.23-5.fc25

HP-UX Apache: version 2.4.18.02.
The version 2.4.18.02 is fixed:
  https://h20392.www2.hpe.com/portal/swdepot/displayProductInfo.do?productNumber=HPUXWSATW503

openSUSE Leap: new apache2 packages.
New packages are available:
  openSUSE Leap 42.2: apache2 2.4.23-6.1

Slackware: new httpd packages.
New packages are available:
  Slackware 14.0: httpd 2.4.25-*-1_slack14.0
  Slackware 14.1: httpd 2.4.25-*-1_slack14.1
  Slackware 14.2: httpd 2.4.25-*-1_slack14.2

Trend Micro ServerProtect: version 3.0.1531.
The version 3.0.1531 is fixed:
  http://files.trendmicro.com/products/splx/product%20patch/splx_30_lx_en_criticalpatch1531.tar.gz
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