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Vulnerability of FreeBSD: privilege escalation via epair

Synthesis of the vulnerability 

An attacker, inside a guest system, can bypass restrictions via epair of FreeBSD, in order to escalate his privileges on the host system.
Impacted software: FreeBSD, Data ONTAP 7-Mode.
Severity of this computer vulnerability: 2/4.
Creation date: 19/03/2020.
Références of this announce: CVE-2020-7452, FreeBSD-SA-20:07.epair, NTAP-20200413-0001, VIGILANCE-VUL-31840.

Description of the vulnerability 

An attacker, inside a guest system, can bypass restrictions via epair of FreeBSD, in order to escalate his privileges on the host system.
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This weakness alert impacts software or systems such as FreeBSD, Data ONTAP 7-Mode.

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

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

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

Solutions for this threat 

FreeBSD: patch for epair.
A patch is available:
  https://security.FreeBSD.org/patches/SA-20:07/epair.11.patch
  https://security.FreeBSD.org/patches/SA-20:07/epair.12.patch

Data ONTAP 7-Mode: solution for FreeBSD.
The solution is indicated in information sources.
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