Vulnerabilities > CVE-2017-15118 - Out-of-bounds Write vulnerability in multiple products

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3575-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(106927);
  script_version("3.7");
  script_cvs_date("Date: 2019/09/18 12:31:48");

  script_cve_id("CVE-2017-11334", "CVE-2017-13672", "CVE-2017-14167", "CVE-2017-15038", "CVE-2017-15118", "CVE-2017-15119", "CVE-2017-15124", "CVE-2017-15268", "CVE-2017-15289", "CVE-2017-16845", "CVE-2017-17381", "CVE-2017-18043", "CVE-2018-5683");
  script_xref(name:"USN", value:"3575-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 17.10 : qemu vulnerabilities (USN-3575-1)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"It was discovered that QEMU incorrectly handled guest ram. A
privileged attacker inside the guest could use this issue to cause
QEMU to crash, resulting in a denial of service. This issue only
affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-11334)

David Buchanan discovered that QEMU incorrectly handled the VGA
device. A privileged attacker inside the guest could use this issue to
cause QEMU to crash, resulting in a denial of service. This issue was
only addressed in Ubuntu 17.10. (CVE-2017-13672)

Thomas Garnier discovered that QEMU incorrectly handled multiboot. An
attacker could use this issue to cause QEMU to crash, resulting in a
denial of service, or possibly execute arbitrary code on the host. In
the default installation, when QEMU is used with libvirt, attackers
would be isolated by the libvirt AppArmor profile. This issue only
affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-14167)

Tuomas Tynkkynen discovered that QEMU incorrectly handled VirtFS
directory sharing. An attacker could use this issue to obtain
sensitive information from host memory. (CVE-2017-15038)

Eric Blake discovered that QEMU incorrectly handled memory in the NBD
server. An attacker could use this issue to cause the NBD server to
crash, resulting in a denial of service. This issue only affected
Ubuntu 17.10. (CVE-2017-15118)

Eric Blake discovered that QEMU incorrectly handled certain options to
the NBD server. An attacker could use this issue to cause the NBD
server to crash, resulting in a denial of service. This issue only
affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-15119)

Daniel Berrange discovered that QEMU incorrectly handled the VNC
server. A remote attacker could possibly use this issue to consume
memory, resulting in a denial of service. This issue was only
addressed in Ubuntu 17.10. (CVE-2017-15124)

Carl Brassey discovered that QEMU incorrectly handled certain
websockets. A remote attacker could possibly use this issue to consume
memory, resulting in a denial of service. This issue only affected
Ubuntu 17.10. (CVE-2017-15268)

Guoxiang Niu discovered that QEMU incorrectly handled the Cirrus VGA
device. A privileged attacker inside the guest could use this issue to
cause QEMU to crash, resulting in a denial of service.
(CVE-2017-15289)

Cyrille Chatras discovered that QEMU incorrectly handled certain PS2
values during migration. An attacker could possibly use this issue to
cause QEMU to crash, resulting in a denial of service, or possibly
execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and
Ubuntu 17.10. (CVE-2017-16845)

It was discovered that QEMU incorrectly handled the Virtio Vring
implementation. An attacker could possibly use this issue to cause
QEMU to crash, resulting in a denial of service. This issue only
affected Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2017-17381)

Eric Blake discovered that QEMU incorrectly handled certain rounding
operations. An attacker could possibly use this issue to cause QEMU to
crash, resulting in a denial of service. This issue only affected
Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-18043)

Jiang Xin and Lin ZheCheng discovered that QEMU incorrectly handled
the VGA device. A privileged attacker inside the guest could use this
issue to cause QEMU to crash, resulting in a denial of service.
(CVE-2018-5683).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu 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://usn.ubuntu.com/3575-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-aarch64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-arm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-mips");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-misc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-ppc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-s390x");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-sparc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-x86");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:17.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/08/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/02/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/21");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(14\.04|16\.04|17\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04 / 16.04 / 17.10", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);

flag = 0;

if (ubuntu_check(osver:"14.04", pkgname:"qemu-system", pkgver:"2.0.0+dfsg-2ubuntu1.39")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"qemu-system-aarch64", pkgver:"2.0.0+dfsg-2ubuntu1.39")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"qemu-system-arm", pkgver:"2.0.0+dfsg-2ubuntu1.39")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"qemu-system-mips", pkgver:"2.0.0+dfsg-2ubuntu1.39")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"qemu-system-misc", pkgver:"2.0.0+dfsg-2ubuntu1.39")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"qemu-system-ppc", pkgver:"2.0.0+dfsg-2ubuntu1.39")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"qemu-system-sparc", pkgver:"2.0.0+dfsg-2ubuntu1.39")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"qemu-system-x86", pkgver:"2.0.0+dfsg-2ubuntu1.39")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"qemu-system", pkgver:"1:2.5+dfsg-5ubuntu10.22")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-aarch64", pkgver:"1:2.5+dfsg-5ubuntu10.22")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-arm", pkgver:"1:2.5+dfsg-5ubuntu10.22")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-mips", pkgver:"1:2.5+dfsg-5ubuntu10.22")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-misc", pkgver:"1:2.5+dfsg-5ubuntu10.22")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-ppc", pkgver:"1:2.5+dfsg-5ubuntu10.22")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-s390x", pkgver:"1:2.5+dfsg-5ubuntu10.22")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-sparc", pkgver:"1:2.5+dfsg-5ubuntu10.22")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-x86", pkgver:"1:2.5+dfsg-5ubuntu10.22")) flag++;
if (ubuntu_check(osver:"17.10", pkgname:"qemu-system", pkgver:"1:2.10+dfsg-0ubuntu3.5")) flag++;
if (ubuntu_check(osver:"17.10", pkgname:"qemu-system-aarch64", pkgver:"1:2.10+dfsg-0ubuntu3.5")) flag++;
if (ubuntu_check(osver:"17.10", pkgname:"qemu-system-arm", pkgver:"1:2.10+dfsg-0ubuntu3.5")) flag++;
if (ubuntu_check(osver:"17.10", pkgname:"qemu-system-mips", pkgver:"1:2.10+dfsg-0ubuntu3.5")) flag++;
if (ubuntu_check(osver:"17.10", pkgname:"qemu-system-misc", pkgver:"1:2.10+dfsg-0ubuntu3.5")) flag++;
if (ubuntu_check(osver:"17.10", pkgname:"qemu-system-ppc", pkgver:"1:2.10+dfsg-0ubuntu3.5")) flag++;
if (ubuntu_check(osver:"17.10", pkgname:"qemu-system-s390x", pkgver:"1:2.10+dfsg-0ubuntu3.5")) flag++;
if (ubuntu_check(osver:"17.10", pkgname:"qemu-system-sparc", pkgver:"1:2.10+dfsg-0ubuntu3.5")) flag++;
if (ubuntu_check(osver:"17.10", pkgname:"qemu-system-x86", pkgver:"1:2.10+dfsg-0ubuntu3.5")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "qemu-system / qemu-system-aarch64 / qemu-system-arm / etc");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:1104. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(109070);
  script_version("1.9");
  script_cvs_date("Date: 2019/10/24 15:35:44");

  script_cve_id("CVE-2017-13672", "CVE-2017-13673", "CVE-2017-13711", "CVE-2017-15118", "CVE-2017-15119", "CVE-2017-15124", "CVE-2017-15268", "CVE-2018-5683");
  script_xref(name:"RHSA", value:"2018:1104");

  script_name(english:"RHEL 7 : Virtualization (RHSA-2018:1104)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An update for qemu-kvm-rhev is now available for Red Hat
Virtualization 4 for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security
impact of Important. 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.

KVM (Kernel-based Virtual Machine) is a full virtualization solution
for Linux on a variety of architectures. The qemu-kvm-rhev packages
provide the user-space component for running virtual machines that use
KVM in environments managed by Red Hat products.

The following packages have been upgraded to a later upstream version:
qemu-kvm-rhev (2.10.0). (BZ#1470749)

Security Fix(es) :

* Qemu: stack-based buffer overflow in NBD server triggered via long
export name (CVE-2017-15118)

* Qemu: DoS via large option request (CVE-2017-15119)

* Qemu: vga: OOB read access during display update (CVE-2017-13672)

* Qemu: vga: reachable assert failure during display update
(CVE-2017-13673)

* Qemu: Slirp: use-after-free when sending response (CVE-2017-13711)

* Qemu: memory exhaustion through framebuffer update request message
in VNC server (CVE-2017-15124)

* Qemu: I/O: potential memory exhaustion via websock connection to VNC
(CVE-2017-15268)

* Qemu: Out-of-bounds read in vga_draw_text routine (CVE-2018-5683)

For more details about the security issue(s), including the impact, a
CVSS score, and other related information, refer to the CVE page(s)
listed in the References section.

Red Hat would like to thank David Buchanan for reporting
CVE-2017-13672 and CVE-2017-13673; Wjjzhang (Tencent.com) for
reporting CVE-2017-13711; and Jiang Xin and Lin ZheCheng for reporting
CVE-2018-5683. The CVE-2017-15118 and CVE-2017-15119 issues were
discovered by Eric Blake (Red Hat) and the CVE-2017-15124 issue was
discovered by Daniel Berrange (Red Hat)."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2018:1104"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-13672"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-13673"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-13711"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-15118"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-15119"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-15124"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-15268"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2018-5683"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-img-rhev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-common-rhev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-rhev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-rhev-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-tools-rhev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/08/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/04/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/04/17");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Red Hat Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 7.x", "Red Hat " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2018:1104";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;

  if (! (rpm_exists(release:"RHEL7", rpm:"qemu-kvm-rhev-2.10.0"))) audit(AUDIT_PACKAGE_NOT_INSTALLED, "Virtualization");

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-img-rhev-2.10.0-21.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-kvm-common-rhev-2.10.0-21.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-kvm-rhev-2.10.0-21.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-kvm-rhev-debuginfo-2.10.0-21.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-kvm-tools-rhev-2.10.0-21.el7")) flag++;

  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "qemu-img-rhev / qemu-kvm-common-rhev / qemu-kvm-rhev / etc");
  }
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3575-2. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(107145);
  script_version("3.7");
  script_cvs_date("Date: 2019/09/18 12:31:48");

  script_cve_id("CVE-2017-11334", "CVE-2017-13672", "CVE-2017-14167", "CVE-2017-15038", "CVE-2017-15118", "CVE-2017-15119", "CVE-2017-15124", "CVE-2017-15268", "CVE-2017-15289", "CVE-2017-16845", "CVE-2017-17381", "CVE-2017-18043", "CVE-2018-5683");
  script_xref(name:"USN", value:"3575-2");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS : qemu regression (USN-3575-2)");
  script_summary(english:"Checks dpkg output for updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Ubuntu host is missing a security-related patch."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"USN-3575-1 fixed vulnerabilities in QEMU. The fix for CVE-2017-11334
caused a regression in Xen environments. This update removes the
problematic fix pending further investigation.

We apologize for the inconvenience.

Original advisory details :

It was discovered that QEMU incorrectly handled guest ram. A
privileged attacker inside the guest could use this issue to cause
QEMU to crash, resulting in a denial of service. This issue only
affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-11334) David
Buchanan discovered that QEMU incorrectly handled the VGA device. A
privileged attacker inside the guest could use this issue to cause
QEMU to crash, resulting in a denial of service. This issue was only
addressed in Ubuntu 17.10. (CVE-2017-13672) Thomas Garnier discovered
that QEMU incorrectly handled multiboot. An attacker could use this
issue to cause QEMU to crash, resulting in a denial of service, or
possibly execute arbitrary code on the host. In the default
installation, when QEMU is used with libvirt, attackers would be
isolated by the libvirt AppArmor profile. This issue only affected
Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-14167) Tuomas
Tynkkynen discovered that QEMU incorrectly handled VirtFS directory
sharing. An attacker could use this issue to obtain sensitive
information from host memory. (CVE-2017-15038) Eric Blake discovered
that QEMU incorrectly handled memory in the NBD server. An attacker
could use this issue to cause the NBD server to crash, resulting in a
denial of service. This issue only affected Ubuntu 17.10.
(CVE-2017-15118) Eric Blake discovered that QEMU incorrectly handled
certain options to the NBD server. An attacker could use this issue to
cause the NBD server to crash, resulting in a denial of service. This
issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS.
(CVE-2017-15119) Daniel Berrange discovered that QEMU incorrectly
handled the VNC server. A remote attacker could possibly use this
issue to consume memory, resulting in a denial of service. This issue
was only addressed in Ubuntu 17.10. (CVE-2017-15124) Carl Brassey
discovered that QEMU incorrectly handled certain websockets. A remote
attacker could possibly use this issue to consume memory, resulting in
a denial of service. This issue only affected Ubuntu 17.10.
(CVE-2017-15268) Guoxiang Niu discovered that QEMU incorrectly handled
the Cirrus VGA device. A privileged attacker inside the guest could
use this issue to cause QEMU to crash, resulting in a denial of
service. (CVE-2017-15289) Cyrille Chatras discovered that QEMU
incorrectly handled certain PS2 values during migration. An attacker
could possibly use this issue to cause QEMU to crash, resulting in a
denial of service, or possibly execute arbitrary code. This issue only
affected Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2017-16845) It was
discovered that QEMU incorrectly handled the Virtio Vring
implementation. An attacker could possibly use this issue to cause
QEMU to crash, resulting in a denial of service. This issue only
affected Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2017-17381) Eric
Blake discovered that QEMU incorrectly handled certain rounding
operations. An attacker could possibly use this issue to cause QEMU to
crash, resulting in a denial of service. This issue only affected
Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-18043) Jiang Xin and
Lin ZheCheng discovered that QEMU incorrectly handled the VGA device.
A privileged attacker inside the guest could use this issue to cause
QEMU to crash, resulting in a denial of service. (CVE-2018-5683).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu 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://usn.ubuntu.com/3575-2/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected qemu package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/08/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/03/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/03/06");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(14\.04|16\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04 / 16.04", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);

flag = 0;

if (ubuntu_check(osver:"14.04", pkgname:"qemu", pkgver:"2.0.0+dfsg-2ubuntu1.40")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"qemu", pkgver:"1:2.5+dfsg-5ubuntu10.24")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "qemu");
}