Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : QEMU vulnerabilities (USN-3649-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3649-1. 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(109894);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");

  script_cve_id("CVE-2017-16845", "CVE-2018-7550", "CVE-2018-7858");
  script_xref(name:"USN", value:"3649-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : QEMU vulnerabilities (USN-3649-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"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 18.04 LTS.
(CVE-2017-16845)

Cyrille Chatras 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. (CVE-2018-7550)

Ross Lagerwall 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. This issue only
affected Ubuntu 17.10 and Ubuntu 18.04 LTS. (CVE-2018-7858).

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://ubuntu.com/security/notices/USN-3649-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P");
  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:C/C:H/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-16845");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/11/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/05/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/17");

  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-common");
  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:"p-cpe:/a:canonical:ubuntu_linux:qemu-user");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-user-binfmt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-user-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-utils");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-block-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-guest-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-keymaps");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-kvm");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Ubuntu Local Security Checks");

  script_copyright(english:"Ubuntu Security Notice (C) 2018-2023 Canonical, Inc. / NASL script (C) 2018-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('14.04' >< os_release || '16.04' >< os_release || '18.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04 / 18.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '14.04', 'pkgname': 'qemu', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-common', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-guest-agent', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-keymaps', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-kvm', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-system', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-system-aarch64', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-system-arm', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-system-common', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-system-mips', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-system-misc', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-system-ppc', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-system-sparc', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-system-x86', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-user', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-user-static', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '14.04', 'pkgname': 'qemu-utils', 'pkgver': '2.0.0+dfsg-2ubuntu1.41'},
    {'osver': '16.04', 'pkgname': 'qemu', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-block-extra', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-guest-agent', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-kvm', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-system', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-system-aarch64', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-system-arm', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-system-common', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-system-mips', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-system-misc', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-system-ppc', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-system-s390x', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-system-sparc', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-system-x86', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-user', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-user-binfmt', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-user-static', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '16.04', 'pkgname': 'qemu-utils', 'pkgver': '1:2.5+dfsg-5ubuntu10.28'},
    {'osver': '18.04', 'pkgname': 'qemu', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-block-extra', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-guest-agent', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-kvm', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-system', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-system-arm', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-system-common', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-system-mips', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-system-misc', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-system-ppc', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-system-s390x', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-system-sparc', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-system-x86', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-user', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-user-binfmt', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-user-static', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'},
    {'osver': '18.04', 'pkgname': 'qemu-utils', 'pkgver': '1:2.11+dfsg-1ubuntu7.1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'qemu / qemu-block-extra / qemu-common / qemu-guest-agent / etc');
}