Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : PackageKit vulnerabilities (USN-4538-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4538-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(183597);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");

  script_cve_id("CVE-2020-16121", "CVE-2020-16122");
  script_xref(name:"USN", value:"4538-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : PackageKit vulnerabilities (USN-4538-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-4538-1 advisory.

  - PackageKit provided detailed error messages to unprivileged callers that exposed information about file
    presence and mimetype of files that the user would be unable to determine on its own. (CVE-2020-16121)

  - PackageKit's apt backend mistakenly treated all local debs as trusted. The apt security model is based on
    repository trust and not on the contents of individual files. On sites with configured PolicyKit rules
    this may allow users to install malicious packages. (CVE-2020-16122)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-4538-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:P/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:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-16122");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/11/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/09/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/10/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gir1.2-packagekitglib-1.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gstreamer1.0-packagekit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpackagekit-glib2-16");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpackagekit-glib2-18");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpackagekit-glib2-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:packagekit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:packagekit-backend-aptcc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:packagekit-backend-smart");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:packagekit-command-not-found");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:packagekit-gtk3-module");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:packagekit-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-packagekit");
  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) 2023 Canonical, Inc. / NASL script (C) 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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04', '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': '16.04', 'pkgname': 'gir1.2-packagekitglib-1.0', 'pkgver': '0.8.17-4ubuntu6~gcc5.4ubuntu1.5'},
    {'osver': '16.04', 'pkgname': 'gstreamer1.0-packagekit', 'pkgver': '0.8.17-4ubuntu6~gcc5.4ubuntu1.5'},
    {'osver': '16.04', 'pkgname': 'libpackagekit-glib2-16', 'pkgver': '0.8.17-4ubuntu6~gcc5.4ubuntu1.5'},
    {'osver': '16.04', 'pkgname': 'libpackagekit-glib2-dev', 'pkgver': '0.8.17-4ubuntu6~gcc5.4ubuntu1.5'},
    {'osver': '16.04', 'pkgname': 'packagekit', 'pkgver': '0.8.17-4ubuntu6~gcc5.4ubuntu1.5'},
    {'osver': '16.04', 'pkgname': 'packagekit-backend-aptcc', 'pkgver': '0.8.17-4ubuntu6~gcc5.4ubuntu1.5'},
    {'osver': '16.04', 'pkgname': 'packagekit-backend-smart', 'pkgver': '0.8.17-4ubuntu6~gcc5.4ubuntu1.5'},
    {'osver': '16.04', 'pkgname': 'packagekit-gtk3-module', 'pkgver': '0.8.17-4ubuntu6~gcc5.4ubuntu1.5'},
    {'osver': '16.04', 'pkgname': 'packagekit-tools', 'pkgver': '0.8.17-4ubuntu6~gcc5.4ubuntu1.5'},
    {'osver': '16.04', 'pkgname': 'python3-packagekit', 'pkgver': '0.8.17-4ubuntu6~gcc5.4ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'gir1.2-packagekitglib-1.0', 'pkgver': '1.1.9-1ubuntu2.18.04.6'},
    {'osver': '18.04', 'pkgname': 'gstreamer1.0-packagekit', 'pkgver': '1.1.9-1ubuntu2.18.04.6'},
    {'osver': '18.04', 'pkgname': 'libpackagekit-glib2-18', 'pkgver': '1.1.9-1ubuntu2.18.04.6'},
    {'osver': '18.04', 'pkgname': 'libpackagekit-glib2-dev', 'pkgver': '1.1.9-1ubuntu2.18.04.6'},
    {'osver': '18.04', 'pkgname': 'packagekit', 'pkgver': '1.1.9-1ubuntu2.18.04.6'},
    {'osver': '18.04', 'pkgname': 'packagekit-command-not-found', 'pkgver': '1.1.9-1ubuntu2.18.04.6'},
    {'osver': '18.04', 'pkgname': 'packagekit-gtk3-module', 'pkgver': '1.1.9-1ubuntu2.18.04.6'},
    {'osver': '18.04', 'pkgname': 'packagekit-tools', 'pkgver': '1.1.9-1ubuntu2.18.04.6'},
    {'osver': '20.04', 'pkgname': 'gir1.2-packagekitglib-1.0', 'pkgver': '1.1.13-2ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'gstreamer1.0-packagekit', 'pkgver': '1.1.13-2ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libpackagekit-glib2-18', 'pkgver': '1.1.13-2ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libpackagekit-glib2-dev', 'pkgver': '1.1.13-2ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'packagekit', 'pkgver': '1.1.13-2ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'packagekit-command-not-found', 'pkgver': '1.1.13-2ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'packagekit-gtk3-module', 'pkgver': '1.1.13-2ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'packagekit-tools', 'pkgver': '1.1.13-2ubuntu1.1'}
];

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_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, 'gir1.2-packagekitglib-1.0 / gstreamer1.0-packagekit / etc');
}