Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : libvirt vulnerability and update (USN-3680-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3680-1. 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(110515);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");

  script_cve_id("CVE-2018-1064", "CVE-2018-3639");
  script_xref(name:"USN", value:"3680-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : libvirt vulnerability and update (USN-3680-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"Ken Johnson and Jann Horn independently discovered that
microprocessors utilizing speculative execution of a memory read may
allow unauthorized memory reads via sidechannel attacks. An attacker
in the guest could use this to expose sensitive guest information,
including kernel memory. This update allows libvirt to expose new CPU
features added by microcode updates to guests. (CVE-2018-3639)

Daniel P. Berrange discovered that libvirt incorrectly handled the
QEMU guest agent. An attacker could possibly use this issue to consume
resources, leading to a denial of service. (CVE-2018-1064).

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-3680-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-3639");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"in_the_news", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/06/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/06/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt-daemon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt-daemon-driver-storage-gluster");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt-daemon-driver-storage-rbd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt-daemon-driver-storage-sheepdog");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt-daemon-driver-storage-zfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt-daemon-system");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt-sanlock");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt-wireshark");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvirt0");
  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:libnss-libvirt");
  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': 'libvirt-bin', 'pkgver': '1.2.2-0ubuntu13.1.27'},
    {'osver': '14.04', 'pkgname': 'libvirt-dev', 'pkgver': '1.2.2-0ubuntu13.1.27'},
    {'osver': '14.04', 'pkgname': 'libvirt0', 'pkgver': '1.2.2-0ubuntu13.1.27'},
    {'osver': '16.04', 'pkgname': 'libvirt-bin', 'pkgver': '1.3.1-1ubuntu10.24'},
    {'osver': '16.04', 'pkgname': 'libvirt-dev', 'pkgver': '1.3.1-1ubuntu10.24'},
    {'osver': '16.04', 'pkgname': 'libvirt0', 'pkgver': '1.3.1-1ubuntu10.24'},
    {'osver': '18.04', 'pkgname': 'libnss-libvirt', 'pkgver': '4.0.0-1ubuntu8.2'},
    {'osver': '18.04', 'pkgname': 'libvirt-bin', 'pkgver': '4.0.0-1ubuntu8.2'},
    {'osver': '18.04', 'pkgname': 'libvirt-clients', 'pkgver': '4.0.0-1ubuntu8.2'},
    {'osver': '18.04', 'pkgname': 'libvirt-daemon', 'pkgver': '4.0.0-1ubuntu8.2'},
    {'osver': '18.04', 'pkgname': 'libvirt-daemon-driver-storage-gluster', 'pkgver': '4.0.0-1ubuntu8.2'},
    {'osver': '18.04', 'pkgname': 'libvirt-daemon-driver-storage-rbd', 'pkgver': '4.0.0-1ubuntu8.2'},
    {'osver': '18.04', 'pkgname': 'libvirt-daemon-driver-storage-sheepdog', 'pkgver': '4.0.0-1ubuntu8.2'},
    {'osver': '18.04', 'pkgname': 'libvirt-daemon-driver-storage-zfs', 'pkgver': '4.0.0-1ubuntu8.2'},
    {'osver': '18.04', 'pkgname': 'libvirt-daemon-system', 'pkgver': '4.0.0-1ubuntu8.2'},
    {'osver': '18.04', 'pkgname': 'libvirt-dev', 'pkgver': '4.0.0-1ubuntu8.2'},
    {'osver': '18.04', 'pkgname': 'libvirt-sanlock', 'pkgver': '4.0.0-1ubuntu8.2'},
    {'osver': '18.04', 'pkgname': 'libvirt-wireshark', 'pkgver': '4.0.0-1ubuntu8.2'},
    {'osver': '18.04', 'pkgname': 'libvirt0', 'pkgver': '4.0.0-1ubuntu8.2'}
];

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_NOTE,
    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, 'libnss-libvirt / libvirt-bin / libvirt-clients / libvirt-daemon / etc');
}