Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS : libde265 vulnerabilities (USN-6617-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6617-1. 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(189774);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/30");

  script_cve_id(
    "CVE-2020-21594",
    "CVE-2020-21595",
    "CVE-2020-21596",
    "CVE-2020-21597",
    "CVE-2020-21598",
    "CVE-2020-21599",
    "CVE-2020-21600",
    "CVE-2020-21601",
    "CVE-2020-21602",
    "CVE-2020-21603",
    "CVE-2020-21604",
    "CVE-2020-21605",
    "CVE-2020-21606",
    "CVE-2021-36408"
  );
  script_xref(name:"USN", value:"6617-1");

  script_name(english:"Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS : libde265 vulnerabilities (USN-6617-1)");

  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 ESM / 18.04 ESM / 20.04 LTS host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-6617-1 advisory.

  - libde265 v1.0.4 contains a heap buffer overflow in the put_epel_hv_fallback function, which can be
    exploited via a crafted a file. (CVE-2020-21594)

  - libde265 v1.0.4 contains a heap buffer overflow in the mc_luma function, which can be exploited via a
    crafted a file. (CVE-2020-21595)

  - libde265 v1.0.4 contains a global buffer overflow in the decode_CABAC_bit function, which can be exploited
    via a crafted a file. (CVE-2020-21596)

  - libde265 v1.0.4 contains a heap buffer overflow in the mc_chroma function, which can be exploited via a
    crafted a file. (CVE-2020-21597)

  - libde265 v1.0.4 contains a heap buffer overflow in the ff_hevc_put_unweighted_pred_8_sse function, which
    can be exploited via a crafted a file. (CVE-2020-21598)

  - libde265 v1.0.4 contains a heap buffer overflow in the de265_image::available_zscan function, which can be
    exploited via a crafted a file. (CVE-2020-21599)

  - libde265 v1.0.4 contains a heap buffer overflow in the put_weighted_pred_avg_16_fallback function, which
    can be exploited via a crafted a file. (CVE-2020-21600)

  - libde265 v1.0.4 contains a stack buffer overflow in the put_qpel_fallback function, which can be exploited
    via a crafted a file. (CVE-2020-21601)

  - libde265 v1.0.4 contains a heap buffer overflow in the put_weighted_bipred_16_fallback function, which can
    be exploited via a crafted a file. (CVE-2020-21602)

  - libde265 v1.0.4 contains a heap buffer overflow in the put_qpel_0_0_fallback_16 function, which can be
    exploited via a crafted a file. (CVE-2020-21603)

  - libde265 v1.0.4 contains a heap buffer overflow fault in the _mm_loadl_epi64 function, which can be
    exploited via a crafted a file. (CVE-2020-21604)

  - libde265 v1.0.4 contains a segmentation fault in the apply_sao_internal function, which can be exploited
    via a crafted a file. (CVE-2020-21605)

  - libde265 v1.0.4 contains a heap buffer overflow fault in the put_epel_16_fallback function, which can be
    exploited via a crafted a file. (CVE-2020-21606)

  - An issue was discovered in libde265 v1.0.8.There is a Heap-use-after-free in intrapred.h when decoding
    file using dec265. (CVE-2021-36408)

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-6617-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected libde265-0, libde265-dev and / or libde265-examples 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:N/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-2020-21598");

  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:"2021/09/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/01/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/01/30");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:esm");
  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:libde265-0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libde265-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libde265-examples");
  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) 2024 Canonical, Inc. / NASL script (C) 2024 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': 'libde265-0', 'pkgver': '1.0.2-2ubuntu0.16.04.1~esm1'},
    {'osver': '16.04', 'pkgname': 'libde265-dev', 'pkgver': '1.0.2-2ubuntu0.16.04.1~esm1'},
    {'osver': '16.04', 'pkgname': 'libde265-examples', 'pkgver': '1.0.2-2ubuntu0.16.04.1~esm1'},
    {'osver': '18.04', 'pkgname': 'libde265-0', 'pkgver': '1.0.2-2ubuntu0.18.04.1~esm1'},
    {'osver': '18.04', 'pkgname': 'libde265-dev', 'pkgver': '1.0.2-2ubuntu0.18.04.1~esm1'},
    {'osver': '18.04', 'pkgname': 'libde265-examples', 'pkgver': '1.0.2-2ubuntu0.18.04.1~esm1'},
    {'osver': '20.04', 'pkgname': 'libde265-0', 'pkgver': '1.0.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libde265-dev', 'pkgver': '1.0.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libde265-examples', 'pkgver': '1.0.4-1ubuntu0.1'}
];

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, 'libde265-0 / libde265-dev / libde265-examples');
}