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Vulnerability of OpenBSD: privilege escalation via Mesa

Synthesis of the vulnerability 

An attacker can bypass restrictions via Mesa of OpenBSD, in order to escalate his privileges.
Impacted systems: OpenBSD.
Severity of this alert: 2/4.
Creation date: 04/12/2019.
Références of this alert: CERTFR-2019-AVI-606, VIGILANCE-VUL-31061.

Description of the vulnerability 

An attacker can bypass restrictions via Mesa of OpenBSD, in order to escalate his privileges.
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This weakness announce impacts software or systems such as OpenBSD.

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

Solutions for this threat 

OpenBSD: patch for Mesa.
A patch is available:
  https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/020_mesaxlock.patch.sig
  https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/009_mesaxlock.patch.sig
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