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Vulnerability of Knot Resolver: privilege escalation via DNSSEC Downgrade

Synthesis of the vulnerability 

An attacker can bypass restrictions via DNSSEC Downgrade of Knot Resolver, in order to escalate his privileges.
Vulnerable products: Fedora.
Severity of this weakness: 2/4.
Creation date: 19/07/2019.
Références of this bulletin: CVE-2019-10191, FEDORA-2019-20f95b0b39, FEDORA-2019-fdb50c675d, VIGILANCE-VUL-29826.

Description of the vulnerability 

An attacker can bypass restrictions via DNSSEC Downgrade of Knot Resolver, in order to escalate his privileges.
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This computer threat alert impacts software or systems such as Fedora.

Our Vigil@nce team determined that the severity of this weakness announce 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 computer weakness bulletin.

Solutions for this threat 

Fedora: new knot-resolver packages.
New packages are available:
  Fedora 29: knot-resolver 4.1.0-1.fc29
  Fedora 30: knot-resolver 4.1.0-1.fc30
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