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Vulnerability of PyYAML: code execution via yaml.load

Synthesis of the vulnerability 

An attacker can use a vulnerability via yaml.load() of PyYAML, in order to run code.
Vulnerable software: Ansible Tower, Fedora, Solaris.
Severity of this announce: 2/4.
Creation date: 21/03/2019.
Références of this computer vulnerability: bulletinjul2019, CVE-2017-18342, FEDORA-2019-bed9afe622, VIGILANCE-VUL-28801.

Description of the vulnerability 

An attacker can use a vulnerability via yaml.load() of PyYAML, in order to run code.
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This computer threat note impacts software or systems such as Ansible Tower, Fedora, Solaris.

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

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

An attacker with a expert ability can exploit this computer weakness note.

Solutions for this threat 

Ansible Tower: version 3.7.0.
The version 3.7.0 is fixed.

Fedora 29: new PyYAML packages.
New packages are available:
  Fedora 29: PyYAML 5.1-1.fc29

Oracle Solaris: patch for third party software of April 2020 v2.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

Oracle Solaris: patch for third party software of July 2019 v1.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1
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