Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers < 1.0.03.18 SSL DoS (cisco-sa-sb-dos-ZN5GvNH7)

#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(140216);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/03/29");

  script_cve_id("CVE-2020-3358");
  script_xref(name:"CISCO-BUG-ID", value:"CSCvu36544");
  script_xref(name:"CISCO-SA", value:"cisco-sa-sb-dos-ZN5GvNH7");

  script_name(english:"Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers < 1.0.03.18 SSL DoS (cisco-sa-sb-dos-ZN5GvNH7)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, Cisco Small Business RV Series Router Firmware is prior to 1.0.03.18. It is,
therefore, affected by a DoS vulnerability in the Secure Sockets Layer (SSL) VPN feature due to a lack of proper
validation of HTTP requests. An unauthenticated, remote attacker could exploit this to cause the device to
unexpectedly reload, resulting in a DoS condition.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb-dos-ZN5GvNH7
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8d77667a");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu36544");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvu36544");
  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:C/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-2020-3358");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(20);

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/07/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/07/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/09/04");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:cisco:small_business_rv_series_router_firmware");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2020-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("cisco_small_business_detect.nasl", "cisco_rv_webui_detect.nbin");
  script_require_keys("Cisco/Small_Business_Router/Version", "Cisco/Small_Business_Router/Model", "Settings/ParanoidReport");

  exit(0);
}

include('ccf.inc');

product_info = cisco::get_product_info(name:'Cisco Small Business Series Router Firmware');

# Plugin is paranoid due to lack of GUI config check
if (report_paranoia < 2) audit(AUDIT_PARANOID);

vuln_ranges = [
  { 'min_ver' : '0.0', 'fix_ver' : '1.0.03.18' }
];

reporting = make_array(
  'port'     , 0,
  'severity' , SECURITY_HOLE,
  'version'  , product_info['version'],
  'bug_id'   , 'CSCvu36544',
  'disable_caveat', TRUE
);

cisco::check_and_report(
  product_info:product_info,
  reporting:reporting,
  vuln_ranges:vuln_ranges,
  models:make_list('RV340', 'RV340W', 'RV345', 'RV345P')
);