FreeBSD : qemu -- denial of service vulnerability in Rocker switch emulation (1384f2fd-b1be-11e5-9728-002590263bf5)

Low Nessus Plugin ID 87686


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


Prasad J Pandit, Red Hat Product Security Team, reports :

Qemu emulator built with the Rocker switch emulation support is vulnerable to an off-by-one error. It happens while processing transmit(tx) descriptors in 'tx_consume' routine, if a descriptor was to have more than allowed (ROCKER_TX_FRAGS_MAX=16) fragments.

A privileged user inside guest could use this flaw to cause memory leakage on the host or crash the Qemu process instance resulting in DoS issue.


Update the affected packages.

See Also

Plugin Details

Severity: Low

ID: 87686

File Name: freebsd_pkg_1384f2fdb1be11e59728002590263bf5.nasl

Version: $Revision: 2.4 $

Type: local

Published: 2016/01/04

Modified: 2017/01/03

Dependencies: 12634

Risk Information

Risk Factor: Low


Base Score: 2.1

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


Base Score: 6.5

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:qemu, p-cpe:/a:freebsd:freebsd:qemu-devel, p-cpe:/a:freebsd:freebsd:qemu-sbruno, p-cpe:/a:freebsd:freebsd:qemu-user-static, cpe:/o:freebsd:freebsd

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

Patch Publication Date: 2016/01/03

Vulnerability Publication Date: 2015/12/28

Reference Information

CVE: CVE-2015-8701