Ubuntu 16.04 LTS : Yerase's TNEF vulnerabilities (USN-4615-1)

##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4615-1. 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(142370);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");

  script_cve_id(
    "CVE-2017-6298",
    "CVE-2017-6299",
    "CVE-2017-6300",
    "CVE-2017-6301",
    "CVE-2017-6302",
    "CVE-2017-6303",
    "CVE-2017-6304",
    "CVE-2017-6305",
    "CVE-2017-6306",
    "CVE-2017-6800",
    "CVE-2017-6801",
    "CVE-2017-6802"
  );
  script_bugtraq_id(96423);
  script_xref(name:"USN", value:"4615-1");

  script_name(english:"Ubuntu 16.04 LTS : Yerase's TNEF vulnerabilities (USN-4615-1)");

  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 host has packages installed that are affected by multiple vulnerabilities as referenced in
the USN-4615-1 advisory.

  - An issue was discovered in ytnef before 1.9.1. This is related to a patch described as 1 of 9. Null
    Pointer Deref / calloc return value not checked. (CVE-2017-6298)

  - An issue was discovered in ytnef before 1.9.1. This is related to a patch described as 2 of 9. Infinite
    Loop / DoS in the TNEFFillMapi function in lib/ytnef.c. (CVE-2017-6299)

  - An issue was discovered in ytnef before 1.9.1. This is related to a patch described as 3 of 9. Buffer
    Overflow in version field in lib/tnef-types.h. (CVE-2017-6300)

  - An issue was discovered in ytnef before 1.9.1. This is related to a patch described as 4 of 9. Out of
    Bounds Reads. (CVE-2017-6301)

  - An issue was discovered in ytnef before 1.9.1. This is related to a patch described as 5 of 9. Integer
    Overflow. (CVE-2017-6302)

  - An issue was discovered in ytnef before 1.9.1. This is related to a patch described as 6 of 9. Invalid
    Write and Integer Overflow. (CVE-2017-6303)

  - An issue was discovered in ytnef before 1.9.1. This is related to a patch described as 7 of 9. Out of
    Bounds read. (CVE-2017-6304)

  - An issue was discovered in ytnef before 1.9.1. This is related to a patch described as 8 of 9. Out of
    Bounds read and write. (CVE-2017-6305)

  - An issue was discovered in ytnef before 1.9.1. This is related to a patch described as 9 of 9. Directory
    Traversal using the filename; SanitizeFilename function in settings.c. (CVE-2017-6306)

  - An issue was discovered in ytnef before 1.9.2. An invalid memory access (heap-based buffer over-read) can
    occur during handling of LONG data types, related to MAPIPrint() in libytnef. (CVE-2017-6800)

  - An issue was discovered in ytnef before 1.9.2. There is a potential out-of-bounds access with fields of
    Size 0 in TNEFParse() in libytnef. (CVE-2017-6801)

  - An issue was discovered in ytnef before 1.9.2. There is a potential heap-based buffer over-read on
    incoming Compressed RTF Streams, related to DecompressRTF() in libytnef. (CVE-2017-6802)

Note that Nessus has not tested for this issue 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-4615-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected libytnef0 and / or libytnef0-dev packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  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:N/UI:R/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-2017-6306");

  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:"2017/02/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/11/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/11/04");

  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:"p-cpe:/a:canonical:ubuntu_linux:libytnef0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libytnef0-dev");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2020-2023 Canonical, Inc. / NASL script (C) 2020-2023 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': 'libytnef0', 'pkgver': '1.5-9ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libytnef0-dev', 'pkgver': '1.5-9ubuntu0.1'}
];

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, 'libytnef0 / libytnef0-dev');
}