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

Medium Nessus Plugin ID 92922


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


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.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 92922

File Name: freebsd_pkg_7b6a11b5600a11e6a6c314dae9d210b8.nasl

Version: $Revision: 2.4 $

Type: local

Published: 2016/08/12

Modified: 2016/12/08

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 4.9

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


Base Score: 6.2

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

Vulnerability Information

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

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2016/08/11

Vulnerability Publication Date: 2016/03/16

Exploitable With

Core Impact

Reference Information

CVE: CVE-2016-1885

FreeBSD: SA-16:15.sysarch