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
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
50.1%
According to its self-reported version, Cisco FTD Software is affected by multiple policy bypass vulnerabilities in its payload inspection component for Ethernet Industrial Protocol (ENIP) traffic due to incomplete deep packet inspection for ENIP traffic. An unauthenticated, remote attacker can exploit these, by sending specially crafted ENIP packets, to bypass configured access control and intrusion policies.
Please see the included Cisco BIDs and Cisco Security Advisory for more information.
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#TRUSTED 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
#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(155315);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/11/15");
script_cve_id("CVE-2021-34753", "CVE-2021-34754");
script_xref(name:"CISCO-BUG-ID", value:"CSCvy02240");
script_xref(name:"CISCO-SA", value:"cisco-sa-ftd-enip-bypass-eFsxd8KP");
script_xref(name:"IAVA", value:"2021-A-0508-S");
script_name(english:"Cisco Firepower Threat Defense Software Ethernet Industrial Protocol Policy Bypass (cisco-sa-ftd-enip-bypass-eFsxd8KP)");
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 FTD Software is affected by multiple policy bypass vulnerabilities in
its payload inspection component for Ethernet Industrial Protocol (ENIP) traffic due to incomplete deep packet
inspection for ENIP traffic. An unauthenticated, remote attacker can exploit these, by sending specially crafted ENIP
packets, to bypass configured access control and intrusion policies.
Please see the included Cisco BIDs and Cisco Security Advisory for more information.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
# https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-enip-bypass-eFsxd8KP
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7b6bd38b");
script_set_attribute(attribute:"see_also", value:"https://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74773");
script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvy02240");
script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvy02240");
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:U/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-2021-34754");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/10/27");
script_set_attribute(attribute:"patch_publication_date", value:"2021/10/27");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/11/12");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a: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) 2021 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");
exit(0);
}
include('ccf.inc');
var product_info = cisco::get_product_info(name:'Cisco Firepower Threat Defense');
var vuln_ranges = [
{'min_ver': '0.0', 'fix_ver': '6.4.0.13'},
{'min_ver': '6.5.0', 'fix_ver': '6.6.5.1'},
{'min_ver': '6.7.0', 'fix_ver': '6.7.0.3'},
{'min_ver': '7.0.0', 'fix_ver': '7.0.1'}
];
var reporting = make_array(
'port' , 0,
'severity' , SECURITY_WARNING,
'version' , product_info['version'],
'bug_id' , 'CSCvy02240',
'disable_caveat', TRUE
);
cisco::check_and_report(
product_info:product_info,
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
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
50.1%