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Vulnerability of Qt5: denial of service via WebSocket 2GB Frames

Synthesis of the vulnerability 

An attacker can trigger a fatal error via WebSocket 2GB Frames of Qt5, in order to trigger a denial of service.
Vulnerable systems: RHEL.
Severity of this threat: 1/4.
Creation date: 04/11/2020.
Références of this weakness: CVE-2018-21035, RHSA-2020:4690-01, VIGILANCE-VUL-33800.

Description of the vulnerability 

An attacker can trigger a fatal error via WebSocket 2GB Frames of Qt5, in order to trigger a denial of service.
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This computer vulnerability impacts software or systems such as RHEL.

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

Solutions for this threat 

RHEL 8: new qt5-qtbase packages.
New packages are available:
  RHEL 8.0-8.2: qt5-qtbase 5.12.5-6.el8
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