Debian DLA-653-1 : qemu-kvm security update

2016-10-12T00:00:00
ID DEBIAN_DLA-653.NASL
Type nessus
Reporter Tenable
Modified 2016-12-06T00:00:00

Description

Multiple vulnerabilities have been found in qemu-kvm :

CVE-2016-7161

Heap-based buffer overflow in the .receive callback of xlnx.xps-ethernetlite in qemu-kvm allows attackers to execute arbitrary code on the QEMU host via a large ethlite packet.

CVE-2016-7170

The vmsvga_fifo_run function in hw/display/vmware_vga.c in qemu-kvm is vulnerable to an OOB memory access.

CVE-2016-7908

The mcf_fec_do_tx function in hw/net/mcf_fec.c in qemu-kvm does not properly limit the buffer descriptor count when transmitting packets, which allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via vectors involving a buffer descriptor with a length of 0 and crafted values in bd.flags.

For Debian 7 'Wheezy', these problems have been fixed in version 1.1.2+dfsg-6+deb7u16.

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.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-653-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(93970);
  script_version("$Revision: 2.2 $");
  script_cvs_date("$Date: 2016/12/06 20:03:52 $");

  script_cve_id("CVE-2016-7161", "CVE-2016-7170", "CVE-2016-7908");
  script_osvdb_id(144061, 144787, 145043, 145167);

  script_name(english:"Debian DLA-653-1 : qemu-kvm security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Multiple vulnerabilities have been found in qemu-kvm :

CVE-2016-7161

Heap-based buffer overflow in the .receive callback of
xlnx.xps-ethernetlite in qemu-kvm allows attackers to execute
arbitrary code on the QEMU host via a large ethlite packet.

CVE-2016-7170

The vmsvga_fifo_run function in hw/display/vmware_vga.c in qemu-kvm is
vulnerable to an OOB memory access.

CVE-2016-7908

The mcf_fec_do_tx function in hw/net/mcf_fec.c in qemu-kvm does not
properly limit the buffer descriptor count when transmitting packets,
which allows local guest OS administrators to cause a denial of
service (infinite loop and QEMU process crash) via vectors involving a
buffer descriptor with a length of 0 and crafted values in bd.flags.

For Debian 7 'Wheezy', these problems have been fixed in version
1.1.2+dfsg-6+deb7u16.

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."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.debian.org/debian-lts-announce/2016/10/msg00009.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/qemu-kvm"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Upgrade the affected kvm, qemu-kvm, and qemu-kvm-dbg packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-kvm-dbg");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2016/10/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/10/12");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016 Tenable Network Security, Inc.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"7.0", prefix:"kvm", reference:"1.1.2+dfsg-6+deb7u16")) flag++;
if (deb_check(release:"7.0", prefix:"qemu-kvm", reference:"1.1.2+dfsg-6+deb7u16")) flag++;
if (deb_check(release:"7.0", prefix:"qemu-kvm-dbg", reference:"1.1.2+dfsg-6+deb7u16")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");