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FreeBSD : FreeBSD -- POSIX shm allows jails to access global namespace (5b1463dd-dab3-11e7-b5af-a4badb2f4699)

high Nessus Plugin ID 105065

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

Named paths are globally scoped, meaning a process located in one jail can read and modify the content of POSIX shared memory objects created by a process in another jail or the host system. Impact : A malicious user that has access to a jailed system is able to abuse shared memory by injecting malicious content in the shared memory region. This memory region might be executed by applications trusting the shared memory, like Squid.

This issue could lead to a Denial of Service or local privilege escalation.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?15166dcf

Plugin Details

Severity: High

ID: 105065

File Name: freebsd_pkg_5b1463dddab311e7b5afa4badb2f4699.nasl

Version: 3.5

Type: local

Published: 12/7/2017

Updated: 1/4/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P

CVSS v3

Risk Factor: High

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:freebsd, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Settings/ParanoidReport, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 12/6/2017

Vulnerability Publication Date: 11/15/2017

Reference Information

CVE: CVE-2017-1087

FreeBSD: SA-17:09.shm