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Vulnerability of FreeBSD: privilege escalation via ixl ioctl

Synthesis of the vulnerability 

An attacker can bypass restrictions via ixl ioctl of FreeBSD, in order to escalate his privileges.
Impacted products: FreeBSD, Data ONTAP 7-Mode.
Severity of this bulletin: 2/4.
Creation date: 19/03/2020.
Références of this threat: CVE-2019-15877, FreeBSD-SA-20:06.if_ixl_ioctl, NTAP-20200413-0001, VIGILANCE-VUL-31839.

Description of the vulnerability 

An attacker can bypass restrictions via ixl ioctl of FreeBSD, in order to escalate his privileges.
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This computer threat bulletin impacts software or systems such as FreeBSD, Data ONTAP 7-Mode.

Our Vigil@nce team determined that the severity of this security threat 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 computer vulnerability alert.

Solutions for this threat 

FreeBSD: patch for ixl ioctl.
A patch is available:
  https://security.FreeBSD.org/patches/SA-20:06/if_ixl_ioctl.patch

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