Ubuntu 16.04 LTS : Apport regressions (USN-3480-2)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3480-2. 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(104712);
  script_version("3.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");

  script_cve_id("CVE-2017-14177", "CVE-2017-14180");
  script_xref(name:"USN", value:"3480-2");

  script_name(english:"Ubuntu 16.04 LTS : Apport regressions (USN-3480-2)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"USN-3480-1 fixed vulnerabilities in Apport. The fix for CVE-2017-14177
introduced a regression in the ability to handle crashes for users
that configured their systems to use the Upstart init system in Ubuntu
16.04 LTS and Ubuntu 17.04. The fix for CVE-2017-14180 temporarily
disabled crash forwarding to containers. This update addresses the
problems.

We apologize for the inconvenience.

Sander Bos discovered that Apport incorrectly handled core dumps for
setuid binaries. A local attacker could use this issue to perform a
denial of service via resource exhaustion or possibly gain root
privileges. (CVE-2017-14177)

Sander Bos discovered that Apport incorrectly handled core
dumps for processes in a different PID namespace. A local
attacker could use this issue to perform a denial of service
via resource exhaustion or possibly gain root privileges.
(CVE-2017-14180).

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-3480-2");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/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:L/AC:L/PR:L/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:"cvss_score_source", value:"CVE-2017-14180");

  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:"2018/02/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/11/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/11/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apport");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apport-gtk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apport-kde");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apport-noui");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apport-retrace");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apport-valgrind");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dh-apport");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-apport");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-problem-report");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-apport");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-problem-report");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  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) 2017-2023 Canonical, Inc. / NASL script (C) 2017-2023 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)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04', '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': 'apport', 'pkgver': '2.20.1-0ubuntu2.13'},
    {'osver': '16.04', 'pkgname': 'apport-gtk', 'pkgver': '2.20.1-0ubuntu2.13'},
    {'osver': '16.04', 'pkgname': 'apport-kde', 'pkgver': '2.20.1-0ubuntu2.13'},
    {'osver': '16.04', 'pkgname': 'apport-noui', 'pkgver': '2.20.1-0ubuntu2.13'},
    {'osver': '16.04', 'pkgname': 'apport-retrace', 'pkgver': '2.20.1-0ubuntu2.13'},
    {'osver': '16.04', 'pkgname': 'apport-valgrind', 'pkgver': '2.20.1-0ubuntu2.13'},
    {'osver': '16.04', 'pkgname': 'dh-apport', 'pkgver': '2.20.1-0ubuntu2.13'},
    {'osver': '16.04', 'pkgname': 'python-apport', 'pkgver': '2.20.1-0ubuntu2.13'},
    {'osver': '16.04', 'pkgname': 'python-problem-report', 'pkgver': '2.20.1-0ubuntu2.13'},
    {'osver': '16.04', 'pkgname': 'python3-apport', 'pkgver': '2.20.1-0ubuntu2.13'},
    {'osver': '16.04', 'pkgname': 'python3-problem-report', 'pkgver': '2.20.1-0ubuntu2.13'}
];

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_HOLE,
    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, 'apport / apport-gtk / apport-kde / apport-noui / apport-retrace / etc');
}