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Vulnerability of OpenBSD: memory corruption via vmm_pvclock

Synthesis of the vulnerability 

An attacker, inside a guest system, can trigger a memory corruption via vmm_pvclock of OpenBSD, in order to trigger a denial of service, and possibly to run code on the host system.
Vulnerable software: OpenBSD.
Severity of this announce: 2/4.
Creation date: 17/02/2020.
Références of this computer vulnerability: VIGILANCE-VUL-31603.

Description of the vulnerability 

An attacker, inside a guest system, can trigger a memory corruption via vmm_pvclock of OpenBSD, in order to trigger a denial of service, and possibly to run code on the host system.
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This weakness bulletin impacts software or systems such as OpenBSD.

Our Vigil@nce team determined that the severity of this computer weakness is medium.

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 vulnerability announce.

Solutions for this threat 

OpenBSD: patch for vmm_pvclock.
A patch is available:
  https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/020_vmm_pvclock.patch.sig
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