Cisco Firepower Threat Defense Security Bypass Vulnerability

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

include("compat.inc");

if (description)
{
  script_id(124773);
  script_version("1.3");
  script_cvs_date("Date: 2019/10/30 13:24:46");

  script_cve_id("CVE-2019-1669");
  script_bugtraq_id(106721);
  script_xref(name:"CISCO-BUG-ID", value:"CSCvo02577");
  script_xref(name:"CISCO-SA", value:"cisco-sa-20190123-firepowertds-bypass");

  script_name(english:"Cisco Firepower Threat Defense Security Bypass Vulnerability");
  script_summary(english:"Checks the Cisco Firepower Threat Defense Software version.");

  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, the Cisco Firepower Threat Defense Software is affected by a security bypass
vulnerability. A flaw exists in the data acquisition component due to improperly handling system memory when inspecting
traffic. An unauthenticated, remote attacker can exploit this issue, to cause the process to stop responding.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-firepowertds-bypass
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d563820a");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvo02577");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID(s) CSCvo02577.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  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-2019-1669");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/01/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/10");

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

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

  script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_dependencies("ssh_get_info.nasl", "os_fingerprint.nasl");
  script_require_keys("Host/Cisco/ASA", "Host/Cisco/ASA/model", "Settings/ParanoidReport");

  exit(0);
}

include('audit.inc');
include('misc_func.inc');
include('global_settings.inc');

if (report_paranoia < 2) audit(AUDIT_PARANOID);

show_ver = get_kb_item_or_exit('Host/Cisco/show_ver');
model = get_kb_item_or_exit('Host/Cisco/ASA/model');

fdm_ver = pregmatch(string:show_ver, pattern:"\s*Model\s*:\s+Cisco.*Threat\s+Defense.*Version\s+([0-9.]+)");
if (isnull(fdm_ver)) audit(AUDIT_HOST_NOT, 'affected');

if (
  fdm_ver[1] == '6.3.0' ||
  fdm_ver[1] == '6.4.0'
)
{
  report =
  '\n  Bug               : CSCvo02577' +
  '\n  Installed version : ' + fdm_ver[1] +
  '\n  Fix               : See advisory';
  security_report_v4(port:0, extra:report, severity:SECURITY_WARNING);
} else audit(AUDIT_HOST_NOT, 'affected');