Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : strongSwan vulnerability (USN-5651-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5651-1. 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(165668);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id("CVE-2022-40617");
  script_xref(name:"USN", value:"5651-1");

  script_name(english:"Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : strongSwan vulnerability (USN-5651-1)");

  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 packages installed that are affected by a vulnerability as
referenced in the USN-5651-1 advisory.

    Lahav Schlesinger discovered that strongSwan incorrectly handled certain OCSP URIs and and CRL
    distribution points (CDP) in certificates. A remote attacker could possibly use this issue to initiate
    IKE_SAs and send crafted certificates that contain URIs pointing to servers under their control, which can
    lead to a denial-of-service attack.

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

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-5651-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected 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:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-40617");

  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:"2022/10/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/10/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/10/05");

  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:charon-cmd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:charon-systemd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcharon-extauth-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcharon-extra-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcharon-standard-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libstrongswan");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libstrongswan-extra-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libstrongswan-standard-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:strongswan");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:strongswan-charon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:strongswan-libcharon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:strongswan-nm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:strongswan-pki");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:strongswan-scepclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:strongswan-starter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:strongswan-swanctl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-ifmap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-pdp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:strongswan-tnc-server");
  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) 2022-2024 Canonical, Inc. / NASL script (C) 2022-2024 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': 'charon-cmd', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'charon-systemd', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'libcharon-extra-plugins', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'libcharon-standard-plugins', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'libstrongswan', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'libstrongswan-extra-plugins', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'libstrongswan-standard-plugins', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'strongswan', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'strongswan-charon', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'strongswan-libcharon', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'strongswan-nm', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'strongswan-pki', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'strongswan-scepclient', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'strongswan-starter', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'strongswan-swanctl', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'strongswan-tnc-base', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'strongswan-tnc-client', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'strongswan-tnc-ifmap', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'strongswan-tnc-pdp', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '18.04', 'pkgname': 'strongswan-tnc-server', 'pkgver': '5.6.2-1ubuntu2.9'},
    {'osver': '20.04', 'pkgname': 'charon-cmd', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'charon-systemd', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'libcharon-extauth-plugins', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'libcharon-extra-plugins', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'libcharon-standard-plugins', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'libstrongswan', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'libstrongswan-extra-plugins', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'libstrongswan-standard-plugins', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'strongswan', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'strongswan-charon', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'strongswan-libcharon', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'strongswan-nm', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'strongswan-pki', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'strongswan-scepclient', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'strongswan-starter', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'strongswan-swanctl', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'strongswan-tnc-base', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'strongswan-tnc-client', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'strongswan-tnc-ifmap', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'strongswan-tnc-pdp', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'strongswan-tnc-server', 'pkgver': '5.8.2-1ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'charon-cmd', 'pkgver': '5.9.5-2ubuntu2.1'},
    {'osver': '22.04', 'pkgname': 'charon-systemd', 'pkgver': '5.9.5-2ubuntu2.1'},
    {'osver': '22.04', 'pkgname': 'libcharon-extauth-plugins', 'pkgver': '5.9.5-2ubuntu2.1'},
    {'osver': '22.04', 'pkgname': 'libcharon-extra-plugins', 'pkgver': '5.9.5-2ubuntu2.1'},
    {'osver': '22.04', 'pkgname': 'libstrongswan', 'pkgver': '5.9.5-2ubuntu2.1'},
    {'osver': '22.04', 'pkgname': 'libstrongswan-extra-plugins', 'pkgver': '5.9.5-2ubuntu2.1'},
    {'osver': '22.04', 'pkgname': 'libstrongswan-standard-plugins', 'pkgver': '5.9.5-2ubuntu2.1'},
    {'osver': '22.04', 'pkgname': 'strongswan', 'pkgver': '5.9.5-2ubuntu2.1'},
    {'osver': '22.04', 'pkgname': 'strongswan-charon', 'pkgver': '5.9.5-2ubuntu2.1'},
    {'osver': '22.04', 'pkgname': 'strongswan-libcharon', 'pkgver': '5.9.5-2ubuntu2.1'},
    {'osver': '22.04', 'pkgname': 'strongswan-nm', 'pkgver': '5.9.5-2ubuntu2.1'},
    {'osver': '22.04', 'pkgname': 'strongswan-pki', 'pkgver': '5.9.5-2ubuntu2.1'},
    {'osver': '22.04', 'pkgname': 'strongswan-scepclient', 'pkgver': '5.9.5-2ubuntu2.1'},
    {'osver': '22.04', 'pkgname': 'strongswan-starter', 'pkgver': '5.9.5-2ubuntu2.1'},
    {'osver': '22.04', 'pkgname': 'strongswan-swanctl', 'pkgver': '5.9.5-2ubuntu2.1'}
];

var flag = 0;
foreach var 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)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'charon-cmd / charon-systemd / libcharon-extauth-plugins / etc');
}