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Debian DLA-698-1 : qemu security update
medium Nessus Plugin ID 94519
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Synopsis
The remote Debian host is missing a security update.Description
Several vulnerabilities were discovered in qemu, a fast processor emulator. 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.
CVE-2016-9101
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.
CVE-2016-9102 CVE-2016-9105 CVE-2016-9106
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 flaws to leak the host memory bytes resulting in DoS for other services.
CVE-2016-9104
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.
CVE-2016-9103
Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an information leakage issue. It could occur by accessing xattribute value before it's written to.
A privileged user inside guest could use this flaw to leak host memory bytes.
For Debian 7 'Wheezy', these problems have been fixed in version 1.1.2+dfsg-6+deb7u18.
We recommend that you upgrade your qemu 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 packages.See Also
https://lists.debian.org/debian-lts-announce/2016/11/msg00006.html
Plugin Details
Severity: Medium
ID: 94519
File Name: debian_DLA-698.nasl
Version: 2.10
Type: local
Agent: unix
Family: Debian Local Security Checks
Published: 11/4/2016
Updated: 1/11/2021
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless 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:qemu, p-cpe:/a:debian:debian_linux:qemu-keymaps, p-cpe:/a:debian:debian_linux:qemu-system, p-cpe:/a:debian:debian_linux:qemu-user, p-cpe:/a:debian:debian_linux:qemu-user-static, p-cpe:/a:debian:debian_linux:qemu-utils, 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: 11/3/2016
Vulnerability Publication Date: 10/5/2016
Reference Information
CVE: CVE-2016-7909, CVE-2016-8909, CVE-2016-8910, CVE-2016-9101, CVE-2016-9102, CVE-2016-9103, CVE-2016-9104, CVE-2016-9105, CVE-2016-9106