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Debian DLA-689-1 : qemu-kvm security update

medium Nessus Plugin ID 94411

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Synopsis

The remote Debian host is missing a security update.

Description

Multiple vulnerabilities have been discovered in qemu-kvm, a full virtualization solution on x86 hardware based on Quick Emulator(Qemu).
The Common Vulnerabilities and Exposures project identifies the following problems :

CVE-2016-7909

Quick Emulator(Qemu) built with the AMD PC-Net II emulator support is vulnerable to an infinite loop issue. It could occur while receiving packets via pcnet_receive().

A privileged user/process inside guest could use this issue to crash the Qemu process on the host leading to DoS.

CVE-2016-8909

Quick Emulator(Qemu) built with the Intel HDA controller emulation support is vulnerable to an infinite loop issue. It could occur while processing the DMA buffer stream while doing data transfer in 'intel_hda_xfer'.

A privileged user inside guest could use this flaw to consume excessive CPU cycles on the host, resulting in DoS.

CVE-2016-8910

Quick Emulator(Qemu) built with the RTL8139 ethernet controller emulation support is vulnerable to an infinite loop issue. It could occur while transmitting packets in C+ mode of operation.

A privileged user inside guest could use this flaw to consume excessive CPU cycles on the host, resulting in DoS situation.

Further issues fixed where the CVE requests are pending :

 - Quick Emulator(Qemu) built with the i8255x (PRO100) NIC emulation support is vulnerable to a memory leakage issue. It could occur while unplugging the device, and doing so repeatedly would result in leaking host memory affecting, other services on the host.

 A privileged user inside guest could use this flaw to cause a DoS on the host and/or potentially crash the Qemu process on the host.

 - Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to a several memory leakage issues.

 A privileged user inside guest could use this flaw to leak the host memory bytes resulting in DoS for other services.

 - Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an integer overflow issue. It could occur by accessing xattributes values.

 A privileged user inside guest could use this flaw to crash the Qemu process instance resulting in DoS.

 - Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to memory leakage issue. It could occur while creating extended attribute via 'Txattrcreate' message.

 A privileged user inside guest could use this flaw to leak host memory, thus affecting other services on the host and/or potentially crash the Qemu process on the host.

For Debian 7 'Wheezy', these problems have been fixed in version 1.1.2+dfsg-6+deb7u18.

We recommend that you upgrade your qemu-kvm packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected kvm, qemu-kvm, and qemu-kvm-dbg packages.

See Also

https://lists.debian.org/debian-lts-announce/2016/10/msg00046.html

https://packages.debian.org/source/wheezy/qemu-kvm

Plugin Details

Severity: Medium

ID: 94411

File Name: debian_DLA-689.nasl

Version: 2.10

Type: local

Agent: unix

Published: 10/31/2016

Updated: 1/11/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

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

CVSS v3

Risk Factor: Medium

Base Score: 6

Temporal Score: 5.2

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:kvm, p-cpe:/a:debian:debian_linux:qemu-kvm-dbg, p-cpe:/a:debian:debian_linux:qemu-kvm, cpe:/o:debian:debian_linux:7.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 10/30/2016

Vulnerability Publication Date: 10/5/2016

Reference Information

CVE: CVE-2016-7909, CVE-2016-8909, CVE-2016-8910