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vulnerability alert CVE-2018-18955

Linux kernel: privilege escalation via User Namespace map_write

Synthesis of the vulnerability

An attacker can bypass restrictions via User Namespace map_write() of the Linux kernel, in order to escalate his privileges.
Vulnerable software: Linux, Ubuntu.
Severity of this announce: 2/4.
Consequences of an intrusion: administrator access/rights, privileged access/rights, data reading, data creation/edition.
Attacker's origin: user shell.
Creation date: 14/11/2018.
Références of this computer vulnerability: 1712, 1798863, CERTFR-2018-AVI-581, CERTFR-2018-AVI-583, CVE-2018-18955, USN-3832-1, USN-3833-1, USN-3835-1, USN-3836-1, USN-3836-2, VIGILANCE-VUL-27781.

Description of the vulnerability

An attacker can bypass restrictions via User Namespace map_write() of the Linux kernel, in order to escalate his privileges.
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