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Vulnerability of grub2: denial of service via grub2-set-bootflag

Synthesis of the vulnerability 

An attacker can trigger a fatal error via grub2-set-bootflag of grub2, in order to trigger a denial of service.
Impacted products: Fedora, RHEL.
Severity of this bulletin: 1/4.
Creation date: 29/11/2019.
Références of this threat: CVE-2019-14865, FEDORA-2019-e99ebf23c8, RHSA-2020:0335-01, VIGILANCE-VUL-31023.

Description of the vulnerability 

An attacker can trigger a fatal error via grub2-set-bootflag of grub2, in order to trigger a denial of service.
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This computer weakness alert impacts software or systems such as Fedora, RHEL.

Our Vigil@nce team determined that the severity of this weakness note is low.

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

An attacker with a expert ability can exploit this weakness bulletin.

Solutions for this threat 

Fedora 31: new grub2 packages.
New packages are available:
  Fedora 31: grub2 2.02-103.fc31

RHEL 8.1: new grub2 packages.
New packages are available:
  RHEL 8.1: grub2 2.02-78.el8_1.1
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