The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a vigilance database and tools to fix them.

Vulnerability of Xen: overload via IRQ Vectors

Synthesis of the vulnerability 

An attacker, inside a guest system, can trigger an overload via IRQ Vectors of Xen, in order to trigger a denial of service on the host system.
Impacted systems: Fedora, Xen.
Severity of this alert: 1/4.
Creation date: 15/12/2020.
Références of this alert: CERTFR-2020-AVI-824, CVE-2020-29567, FEDORA-2020-64859a826b, FEDORA-2020-df772b417b, VIGILANCE-VUL-34121, XSA-356.

Description of the vulnerability 

An attacker, inside a guest system, can trigger an overload via IRQ Vectors of Xen, in order to trigger a denial of service on the host system.
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

This security weakness impacts software or systems such as Fedora, Xen.

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

Solutions for this threat 

Xen: patch for IRQ Vectors.
A patch is available:
  http://xenbits.xen.org/xsa/xsa356.patch

Fedora 32-33: new xen packages.
New packages are available:
  Fedora 32: xen 4.13.2-5.fc32
  Fedora 33: xen 4.14.0-14.fc33
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

Computer vulnerabilities tracking service 

Vigil@nce provides systems vulnerabilities announces. The Vigil@nce security watch publishes vulnerability bulletins about threats impacting the information system.