FreeBSD : xen-tools -- virtio: unbounded memory allocation issue (06574c62-5854-11e6-b334-002590263bf5)

medium Nessus Plugin ID 92676
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Synopsis

The remote FreeBSD host is missing a security-related update.

Description

The Xen Project reports :

A guest can submit virtio requests without bothering to wait for completion and is therefore not bound by virtqueue size...

A malicious guest administrator can cause unbounded memory allocation in QEMU, which can cause an Out-of-Memory condition in the domain running qemu. Thus, a malicious guest administrator can cause a denial of service affecting the whole host.

Solution

Update the affected package.

See Also

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211482

http://xenbits.xen.org/xsa/advisory-184.html

http://www.nessus.org/u?581e9972

Plugin Details

Severity: Medium

ID: 92676

File Name: freebsd_pkg_06574c62585411e6b334002590263bf5.nasl

Version: 2.5

Type: local

Published: 8/2/2016

Updated: 1/4/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.9

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

CVSS v3

Risk Factor: Medium

Base Score: 5.5

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

Vulnerability Information

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

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

Patch Publication Date: 8/2/2016

Vulnerability Publication Date: 7/27/2016

Reference Information

CVE: CVE-2016-5403