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FreeBSD : FreeBSD -- Incorrect privilege validation in the NFS server (e5d2442d-5e76-11e6-a6c3-14dae9d210b8)

medium Nessus Plugin ID 92834

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Synopsis

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

Description

Problem Description :

The kernel incorrectly uses client supplied credentials instead of the one configured in exports(5) when filling out the anonymous credential for a NFS export, when -network or -host restrictions are used at the same time.

Impact :

The remote client may supply privileged credentials (e.g. the root user) when accessing a file under the NFS share, which will bypass the normal access checks.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?e921ad7c

Plugin Details

Severity: Medium

ID: 92834

File Name: freebsd_pkg_e5d2442d5e7611e6a6c314dae9d210b8.nasl

Version: 2.5

Type: local

Published: 8/10/2016

Updated: 1/4/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.0

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/9/2016

Vulnerability Publication Date: 7/6/2013

Reference Information

CVE: CVE-2013-4851

BID: 61484

FreeBSD: SA-13:08.nfsserver