Ubuntu 22.04 LTS / 23.10 / 24.04 LTS : cJSON vulnerabilities (USN-6784-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6784-1. 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(197836);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/23");

  script_cve_id("CVE-2023-50471", "CVE-2023-50472", "CVE-2024-31755");
  script_xref(name:"USN", value:"6784-1");

  script_name(english:"Ubuntu 22.04 LTS / 23.10 / 24.04 LTS : cJSON vulnerabilities (USN-6784-1)");

  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 22.04 LTS / 23.10 / 24.04 LTS host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-6784-1 advisory.

    It was discovered that cJSON incorrectly handled certain input. An attacker could possibly use this issue
    to cause cJSON to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS and
    Ubuntu 23.10. (CVE-2023-50471, CVE-2023-50472)

    Luo Jin discovered that cJSON incorrectly handled certain input. An attacker could possibly use this issue
    to cause cJSON to crash, resulting in a denial of service. (CVE-2024-31755)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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-6784-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected libcjson-dev and / or libcjson1 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:N/UI:N/S:U/C:N/I:N/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-2023-50472");

  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:"2023/12/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/05/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/05/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:23.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcjson-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcjson1");
  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 (! ('22.04' >< os_release || '23.10' >< os_release || '24.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 22.04 / 23.10 / 24.04', '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': '22.04', 'pkgname': 'libcjson-dev', 'pkgver': '1.7.15-1ubuntu0.1~esm2'},
    {'osver': '22.04', 'pkgname': 'libcjson1', 'pkgver': '1.7.15-1ubuntu0.1~esm2'},
    {'osver': '23.10', 'pkgname': 'libcjson-dev', 'pkgver': '1.7.16-1ubuntu0.2'},
    {'osver': '23.10', 'pkgname': 'libcjson1', 'pkgver': '1.7.16-1ubuntu0.2'},
    {'osver': '24.04', 'pkgname': 'libcjson-dev', 'pkgver': '1.7.17-1ubuntu0.1~esm2'},
    {'osver': '24.04', 'pkgname': 'libcjson1', 'pkgver': '1.7.17-1ubuntu0.1~esm2'}
];

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, 'libcjson-dev / libcjson1');
}