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Vulnerability of FreeBSD: read-write access via Jail Allow.mount

Synthesis of the vulnerability 

An attacker can bypass access restrictions via Jail Allow.mount of FreeBSD, in order to read or alter data.
Vulnerable products: FreeBSD.
Severity of this weakness: 1/4.
Creation date: 07/04/2021.
Références of this bulletin: CVE-2020-25584, FreeBSD-SA-21:10.jail_mount, VIGILANCE-VUL-35016.

Description of the vulnerability 

An attacker can bypass access restrictions via Jail Allow.mount of FreeBSD, in order to read or alter data.
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This security bulletin impacts software or systems such as FreeBSD.

Our Vigil@nce team determined that the severity of this cybersecurity announce is low.

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 vulnerability alert.

Solutions for this threat 

FreeBSD: patch for Jail Allow.mount.
A patch is available:
  https://security.FreeBSD.org/patches/SA-21:10/jail_mount.11.patch
  https://security.FreeBSD.org/patches/SA-21:10/jail_mount.12.patch
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