Virtuozzo 7 : qemu-img / qemu-kvm / qemu-kvm-common / etc (VZLSA-2017-0083)

Low Nessus Plugin ID 101410


The remote Virtuozzo host is missing a security update.


An update for qemu-kvm is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm packages provide the user-space component for running virtual machines using KVM.

Security Fix(es) :

* An out-of-bounds read-access flaw was found in the QEMU emulator built with IP checksum routines. The flaw could occur when computing a TCP/UDP packet's checksum, because a QEMU function used the packet's payload length without checking against the data buffer's size. A user inside a guest could use this flaw to crash the QEMU process (denial of service). (CVE-2016-2857)

Red Hat would like to thank Ling Liu (Qihoo 360 Inc.) for reporting this issue.

Bug Fix(es) :

* Previously, rebooting a guest virtual machine more than 128 times in a short period of time caused the guest to shut down instead of rebooting, because the virtqueue was not cleaned properly. This update ensures that the virtqueue is cleaned more reliably, which prevents the described problem from occurring. (BZ#1393484)

Note that Tenable Network Security has attempted to extract the preceding description block directly from the corresponding Red Hat security advisory. Virtuozzo provides no description for VZLSA advisories. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected qemu-img / qemu-kvm / qemu-kvm-common / etc package.

See Also

Plugin Details

Severity: Low

ID: 101410

File Name: Virtuozzo_VZLSA-2017-0083.nasl

Version: $Revision: 1.2 $

Type: local

Published: 2017/07/13

Modified: 2017/07/18

Dependencies: 12634

Risk Information

Risk Factor: Low


Base Score: 2.1

Temporal Score: 1.6

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C


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:virtuozzo:virtuozzo:qemu-img, p-cpe:/a:virtuozzo:virtuozzo:qemu-kvm, p-cpe:/a:virtuozzo:virtuozzo:qemu-kvm-common, p-cpe:/a:virtuozzo:virtuozzo:qemu-kvm-tools, cpe:/o:virtuozzo:virtuozzo:7

Required KB Items: Host/local_checks_enabled, Host/Virtuozzo/release, Host/Virtuozzo/rpm-list

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2017/01/18

Reference Information

CVE: CVE-2016-2857

OSVDB: 135305