Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : JSON5 vulnerability (USN-6758-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6758-1. 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(194751);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/30");

  script_cve_id("CVE-2022-46175");
  script_xref(name:"USN", value:"6758-1");

  script_name(english:"Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : JSON5 vulnerability (USN-6758-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS host has a package installed that is affected by a vulnerability as
referenced in the USN-6758-1 advisory.

  - JSON5 is an extension to the popular JSON file format that aims to be easier to write and maintain by hand
    (e.g. for config files). The `parse` method of the JSON5 library before and including versions 1.0.1 and
    2.2.1 does not restrict parsing of keys named `__proto__`, allowing specially crafted strings to pollute
    the prototype of the resulting object. This vulnerability pollutes the prototype of the object returned by
    `JSON5.parse` and not the global Object prototype, which is the commonly understood definition of
    Prototype Pollution. However, polluting the prototype of a single object can have significant security
    impact for an application if the object is later used in trusted operations. This vulnerability could
    allow an attacker to set arbitrary and unexpected keys on the object returned from `JSON5.parse`. The
    actual impact will depend on how applications utilize the returned object and how they filter unwanted
    keys, but could include denial of service, cross-site scripting, elevation of privilege, and in extreme
    cases, remote code execution. `JSON5.parse` should restrict parsing of `__proto__` keys when parsing JSON
    strings to objects. As a point of reference, the `JSON.parse` method included in JavaScript ignores
    `__proto__` keys. Simply changing `JSON5.parse` to `JSON.parse` in the examples above mitigates this
    vulnerability. This vulnerability is patched in json5 versions 1.0.2, 2.2.2, and later. (CVE-2022-46175)

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-6758-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected node-json5 package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  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: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-2022-46175");

  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:"2022/12/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/04/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/04/30");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:node-json5");
  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 (! ('18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04 / 20.04 / 22.04', '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': '18.04', 'pkgname': 'node-json5', 'pkgver': '0.5.1-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'node-json5', 'pkgver': '0.5.1-3ubuntu0.1'},
    {'osver': '22.04', 'pkgname': 'node-json5', 'pkgver': '2.2.0+dfsg-1ubuntu0.1~esm1'}
];

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, 'node-json5');
}