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Debian DLA-939-1 : qemu-kvm security update
critical Nessus Plugin ID 100133
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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-2016-9603
qemu-kvm built with the Cirrus CLGD 54xx VGA Emulator and the VNC display driver support is vulnerable to a heap buffer overflow issue.
It could occur when Vnc client attempts to update its display after a vga operation is performed by a guest.
A privileged user/process inside guest could use this flaw to crash the Qemu process resulting in DoS OR potentially leverage it to execute arbitrary code on the host with privileges of the Qemu process.
CVE-2017-7718
qemu-kvm built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt functions cirrus_bitblt_rop_fwd_transp_ and/or cirrus_bitblt_rop_fwd_.
A privileged user inside guest could use this flaw to crash the Qemu process resulting in DoS.
CVE-2017-7980
qemu-kvm built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds r/w access issues. It could occur while copying VGA data via various bitblt functions.
A privileged user inside guest could use this flaw to crash the Qemu process resulting in DoS OR potentially execute arbitrary code on a host with privileges of Qemu process on the host.
For Debian 7 'Wheezy', these problems have been fixed in version 1.1.2+dfsg-6+deb7u21.
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/2017/05/msg00010.html
Plugin Details
Severity: Critical
ID: 100133
File Name: debian_DLA-939.nasl
Version: 3.9
Type: local
Agent: unix
Family: Debian Local Security Checks
Published: 5/12/2017
Updated: 1/11/2021
Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.5
CVSS v2
Risk Factor: High
Base Score: 9
Temporal Score: 6.7
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS v3
Risk Factor: Critical
Base Score: 9.9
Temporal Score: 8.6
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/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, p-cpe:/a:debian:debian_linux:qemu-kvm-dbg, 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: 5/11/2017