Check Point Gaia Operating System (sk185033)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(321197);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/16");

  script_cve_id("CVE-2026-50751");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2026/06/11");

  script_name(english:"Check Point Gaia Operating System (sk185033)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"The version of Gaia Operating System installed on the remote host is prior to tested version. It is, therefore, affected
by a vulnerability as referenced in the sk185033 advisory.

  - A logic flow weakness in Remote Access and Mobile Access certificate validation in deprecated IKEv1 key
    exchange allows an unauthenticated remote attacker to bypass user authentication and establish a remote
    access VPN connection without a valid user password. (CVE-2026-50751)

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://support.checkpoint.com/results/sk/sk185033");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant patch referenced in the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:P/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:A");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-50751");

  script_set_attribute(attribute:"exploited_by_nessus", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/06/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/16");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:check_point:gaia_os");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Firewalls");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("check_point_gaia_os_version.nbin");
  script_require_keys("Host/Check_Point/version", "Host/Check_Point/installed_hotfixes",  "Settings/ParanoidReport");

  exit(0);
}

if (report_paranoia < 2) audit(AUDIT_PARANOID);

var app_name = 'Gaia Operating System';
var version  = get_kb_item_or_exit('Host/Check_Point/version');
var hfs      = get_kb_item_or_exit('Host/Check_Point/installed_hotfixes');
var vuln     = FALSE;

if ((version == 'R80.20') || (version == 'R80.40') || 
    (version == 'R81') || (version == 'R81.10') || (version == 'R81.20') ||
    (version == 'R82') || (version == 'R82.00') || (version == 'R82.10')
  )
{
  if ('sk185033' >!< hfs)
    vuln = TRUE;
}
else
  audit(AUDIT_DEVICE_NOT_VULN, 'The remote device running ' + app_name + ' (version ' + version + ')');

if (vuln)
{
  var report =
    '\n  Installed version      : ' + version +
    '\n  Hotfix required        : Hotfix sk185033' +
    '\n';
  security_report_v4(port:0, severity:SECURITY_HOLE, extra:report);
}
else audit(AUDIT_DEVICE_NOT_VULN, 'The remote device running ' + app_name + ' (version ' + version + ')');