The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a vigilance database and tools to fix them.

Vulnerability of OpenVPN: denial of service via Client Float

Synthesis of the vulnerability 

An attacker can trigger a fatal error via Client Float of OpenVPN, in order to trigger a denial of service.
Impacted systems: Fedora, openSUSE Leap, Slackware, SLES, Ubuntu, Unix (platform) ~ not comprehensive.
Severity of this alert: 3/4.
Creation date: 17/04/2020.
Références of this alert: CVE-2020-11810, FEDORA-2020-969414e05b, FEDORA-2020-c1cb4ebcd9, FEDORA-2020-e56f2deb30, openSUSE-SU-2021:0734-1, OpenVPN, SSA:2020-107-01, SUSE-SU-2021:1577-1, USN-4933-1, VIGILANCE-VUL-32051.

Description of the vulnerability 

An attacker can trigger a fatal error via Client Float of OpenVPN, in order to trigger a denial of service.
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This vulnerability announce impacts software or systems such as Fedora, openSUSE Leap, Slackware, SLES, Ubuntu, Unix (platform) ~ not comprehensive.

Our Vigil@nce team determined that the severity of this cybersecurity threat is important.

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 computer threat bulletin.

Solutions for this threat 

OpenVPN: patch for Client Float.
A patch is indicated in information sources.

Fedora 30, 31, 32: new openvpn packages.
New packages are available:
  Fedora 30: openvpn 2.4.9-1.fc30
  Fedora 31: openvpn 2.4.9-1.fc31
  Fedora 32: openvpn 2.4.9-1.fc32

openSUSE Leap 15.2: new openvpn packages.
New packages are available:
  openSUSE Leap 15.2: openvpn 2.4.3-lp152.6.3.1

Slackware: new openvpn packages.
New packages are available:
  Slackware 14.0: openvpn 2.4.9-*-1_slack14.0
  Slackware 14.1: openvpn 2.4.9-*-1_slack14.1
  Slackware 14.2: openvpn 2.4.9-*-1_slack14.2

SUSE LE 15 SP2-3: new openvpn packages.
New packages are available:
  SUSE LE 15 SP2: openvpn 2.4.3-5.7.1
  SUSE LE 15 SP3: openvpn 2.4.3-5.7.1

Ubuntu: new openvpn packages.
New packages are available:
  Ubuntu 21.04: openvpn 2.5.1-1ubuntu1.1
  Ubuntu 20.10: openvpn 2.4.9-3ubuntu1.1
  Ubuntu 20.04 LTS: openvpn 2.4.7-1ubuntu2.20.04.2
  Ubuntu 18.04 LTS: openvpn 2.4.4-2ubuntu1.5
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