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FreeBSD : FreeBSD -- Incorrect argument validation in sysarch(2) (7b6a11b5-600a-11e6-a6c3-14dae9d210b8)

medium Nessus Plugin ID 92922

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Synopsis

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

Description

A special combination of sysarch(2) arguments, specify a request to uninstall a set of descriptors from the LDT. The start descriptor is cleared and the number of descriptors are provided. Due to lack of sufficient bounds checking during argument validity verification, unbound zero'ing of the process LDT and adjacent memory can be initiated from usermode. Impact : This vulnerability could cause the kernel to panic. In addition it is possible to perform a local Denial of Service against the system by unprivileged processes.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?0c3298fe

Plugin Details

Severity: Medium

ID: 92922

File Name: freebsd_pkg_7b6a11b5600a11e6a6c314dae9d210b8.nasl

Version: 2.8

Type: local

Published: 8/12/2016

Updated: 1/4/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.6

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 4

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

CVSS v3

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 5.8

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

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/11/2016

Vulnerability Publication Date: 3/16/2016

Exploitable With

Core Impact

Reference Information

CVE: CVE-2016-1885

FreeBSD: SA-16:15.sysarch