CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
EPSS
Percentile
51.4%
According to its self-reported version, the Cisco Firepower Threat Defense (FTD) Software is affected by an authentication bypass vulnerability in the implementation of Security Assertion Markup Language (SAML) 2.0 Single Sign-On (SSO) for Clientless SSL VPN (WebVPN) and AnyConnect Remote Access VPN. The vulnerability is due to improper credential management when using NT LAN Manager (NTLM) or basic authentication. An attacker could exploit this vulnerability by opening a VPN session to an affected device after another VPN user has successfully authenticated to the affected device via SAML SSO.
A successful exploit could allow the attacker to connect to secured networks behind the affected device. (CVE-2019-1714)
Please see the included Cisco BID and Cisco Security Advisory for more information.
#
# (C) Tenable Network Security, Inc.
#
include('compat.inc');
if (description)
{
script_id(128064);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/03/31");
script_cve_id("CVE-2019-1714");
script_bugtraq_id(108185);
script_xref(name:"CISCO-BUG-ID", value:"CSCvn72570");
script_xref(name:"CISCO-SA", value:"cisco-sa-20190501-asaftd-saml-vpn");
script_xref(name:"IAVA", value:"2019-A-0271-S");
script_name(english:"Cisco Firepower Threat Defense (FTD) VPN SAML Authentication Bypass Vulnerability (cisco-sa-20190501-asaftd-saml-vpn)");
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 (FTD) Software is affected by an authentication bypass
vulnerability in the implementation of Security Assertion Markup
Language (SAML) 2.0 Single Sign-On (SSO) for Clientless SSL VPN
(WebVPN) and AnyConnect Remote Access VPN. The vulnerability is due
to improper credential management when using NT LAN Manager (NTLM)
or basic authentication. An attacker could exploit this vulnerability
by opening a VPN session to an affected device after another VPN user
has successfully authenticated to the affected device via SAML SSO.
A successful exploit could allow the attacker to connect to secured
networks behind the affected device. (CVE-2019-1714)
Please see the included Cisco BID and Cisco Security Advisory for
more information.");
# https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-asaftd-saml-vpn
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4bb85a40");
script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvn72570");
script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID
CSCvn72570");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/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:L/PR:N/UI:N/S:C/C:N/I:H/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-2019-1714");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_cwe_id(255);
script_set_attribute(attribute:"vuln_publication_date", value:"2019/05/01");
script_set_attribute(attribute:"patch_publication_date", value:"2019/05/01");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/22");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:firepower_threat_defense");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CISCO");
script_copyright(english:"This script is Copyright (C) 2019-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("cisco_enumerate_firepower.nbin");
script_require_keys("installed_sw/Cisco Firepower Threat Defense", "Host/Cisco/Firepower");
exit(0);
}
include('ccf.inc');
include('cisco_workarounds.inc');
var product_info = cisco::get_product_info(name:'Cisco Firepower Threat Defense');
var vuln_ranges = [
{'min_ver' : '6.2.1', 'fix_ver' : '6.2.3.12'},
{'min_ver' : '6.3.0', 'fix_ver' : '6.3.0.3'}
];
var is_ftd_cli = get_kb_item_or_exit("Host/Cisco/Firepower/is_ftd_cli");
var workarounds = [];
var cmds = [];
var extra = NULL;
if (!is_ftd_cli)
{
if (report_paranoia < 2)
audit(AUDIT_PARANOID);
else
{
extra = 'Note that Nessus was unable to check for workarounds';
}
}
else
{
workarounds = make_list(CISCO_WORKAROUNDS['generic_workaround']);
workaround_params = [WORKAROUND_CONFIG['show_webvpn_saml_idp'], WORKAROUND_CONFIG['saml_2_sp'], {'require_all_generic_workarounds':TRUE}];
cmds = make_list('show webvpn saml idp', 'show running-config');
}
var reporting = make_array(
'port' , 0,
'severity' , SECURITY_WARNING,
'version' , product_info['version'],
'bug_id' , 'CSCvn72570',
'extra' , extra
);
if (max_index(cmds) > 0)
reporting['cmds'] = cmds;
cisco::check_and_report(
product_info:product_info,
workarounds:workarounds,
workaround_params:workaround_params,
reporting:reporting,
vuln_ranges:vuln_ranges
);
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
EPSS
Percentile
51.4%