FreeBSD : FreeBSD -- Xen guests can triger backend Out Of Memory (5d91370b-61fd-11eb-b87a-901b0ef719ab)

medium Nessus Plugin ID 145567
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


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


Some OSes (including Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is able to handle, they will get queued.

As the queue is unbound, a guest may be able to trigger a OOM in the backend.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 145567

File Name: freebsd_pkg_5d91370b61fd11ebb87a901b0ef719ab.nasl

Version: 1.2

Type: local

Published: 1/29/2021

Updated: 2/2/2021

Dependencies: ssh_get_info.nasl

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Medium

Score: 4.4


Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

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

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/29/2021

Vulnerability Publication Date: 1/29/2021

Reference Information

CVE: CVE-2020-29568

FreeBSD: SA-21:02.xenoom