Cisco AnyConnect Secure Mobility Client < 4.6.01098 Certificate Bypass Vulnerability

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

include("compat.inc");

if (description)
{
  script_id(110563);
  script_version("1.5");
  script_cvs_date("Date: 2019/11/04");

  script_cve_id("CVE-2018-0334");
  script_bugtraq_id(104430);
  script_xref(name:"CISCO-SA", value:"cisco-sa-20180606-AnyConnect-cert-bypass");
  script_xref(name:"CISCO-BUG-ID", value:"CSCvh23141");

  script_name(english:"Cisco AnyConnect Secure Mobility Client < 4.6.01098 Certificate Bypass Vulnerability");
  script_summary(english:"Checks the version of the Cisco AnyConnect client.");

  script_set_attribute(attribute:"synopsis", value:
"A VPN application installed on the remote host is affected by a
certificate bypass vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Cisco AnyConnect Secure Mobility Client installed on
the remote Windows host is prior to 4.6.01098. It is, therefore,
affected by a certificate bypass vulnerability.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-AnyConnect-cert-bypass
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?327a2cae");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Cisco AnyConnect Secure Mobility Client version 4.6.01098 
or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-0334");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/06/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/06/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/06/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:anyconnect_secure_mobility_client");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("cisco_anyconnect_vpn_installed.nasl");
  script_require_keys("installed_sw/Cisco AnyConnect Secure Mobility Client", "SMB/Registry/Enumerated");
  script_require_ports(139, 445);

  exit(0);
}

include("vcf.inc");

get_kb_item_or_exit("SMB/Registry/Enumerated");
app_info = vcf::get_app_info(app:"Cisco AnyConnect Secure Mobility Client", win_local:TRUE);

constraints = [
  { "fixed_version":"4.5.05030" },
  { "min_version":"4.6", "fixed_version":"4.6.01098" }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);