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Vulnerability of Nagios Core: NULL pointer dereference via qh_core

Synthesis of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via qh_core of Nagios Core, in order to trigger a denial of service.
Vulnerable software: Fedora, Nagios Open Source, openSUSE Leap, SLES.
Severity of this announce: 1/4.
Creation date: 13/07/2018.
Références of this computer vulnerability: CVE-2018-13458, FEDORA-2019-0b44528ff1, FEDORA-2019-376ecc221c, openSUSE-SU-2020:0500-1, openSUSE-SU-2020:0517-1, VIGILANCE-VUL-26737.

Description of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via qh_core of Nagios Core, in order to trigger a denial of service.
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This threat impacts software or systems such as Fedora, Nagios Open Source, openSUSE Leap, SLES.

Our Vigil@nce team determined that the severity of this computer threat is low.

The trust level is of type confirmed by the editor, with an origin of user shell.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this cybersecurity bulletin.

Solutions for this threat 

Nagios Core: version 4.4.2.
The version 4.4.2 is fixed:
  https://github.com/NagiosEnterprises/nagioscore/

Fedora: new nagios packages.
New packages are available:
  Fedora 28: nagios 4.4.3-1.fc28
  Fedora 29: nagios 4.4.3-1.fc29

openSUSE Leap 15.1: new nagios packages.
New packages are available:
  openSUSE Leap 15.1: nagios 4.4.5-lp151.5.4.1

SUSE LE 15 SP1: new nagios packages.
New packages are available:
  SUSE LE 15 SP1: nagios 4.4.5-bp151.4.3.1

Wind River Linux: solution (16/10/2018).
The solution is indicated in information sources.
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