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Vulnerability of Dovecot: NULL pointer dereference via Push Notification

Synthesis of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via Push Notification of Dovecot, in order to trigger a denial of service.
Impacted systems: Fedora.
Severity of this alert: 2/4.
Creation date: 08/01/2020.
Références of this alert: CVE-2019-19722, FEDORA-2019-5898f4f935, FEDORA-2019-72e5ac943a, VIGILANCE-VUL-31271.

Description of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via Push Notification of Dovecot, in order to trigger a denial of service.
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This computer vulnerability note impacts software or systems such as Fedora.

Our Vigil@nce team determined that the severity of this computer vulnerability announce 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 cybersecurity announce.

Solutions for this threat 

Fedora: new dovecot packages.
New packages are available:
  Fedora 30: dovecot 2.3.9.2-1.fc30
  Fedora 31: dovecot 2.3.9.2-1.fc31
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