Vulnerabilities > CVE-2020-3334 - Resource Exhaustion vulnerability in Cisco products

CVSS 7.4 - HIGH

Attack vector

ADJACENT_NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

NONE

Integrity impact

NONE

Availability impact

HIGH

low complexity

cisco

CWE-400

nessus

NVD

Published: 2020-05-06

Updated: 2023-08-16

Summary

A vulnerability in the ARP packet processing of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series Security Appliances could allow an unauthenticated, adjacent attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect processing of ARP packets received by the management interface of an affected device. An attacker could exploit this vulnerability by sending a series of unicast ARP packets in a short timeframe that would reach the management interface of an affected device. A successful exploit could allow the attacker to consume resources on an affected device, which would prevent the device from sending internal system keepalives and eventually cause the device to reload, resulting in a denial of service (DoS) condition.

Vulnerable Configurations

Part	Description	Count
OS	Cisco Cisco Adaptive Security Appliance Software 9.12 Cisco Adaptive Security Appliance Software 9.12.0 Cisco Adaptive Security Appliance Software 9.12.1 Cisco Adaptive Security Appliance Software 9.12.1.2 Cisco Adaptive Security Appliance Software 9.12.1.3 Cisco Adaptive Security Appliance Software 9.12.2 Cisco Adaptive Security Appliance Software 9.12.2.1 Cisco Adaptive Security Appliance Software 9.12.2.4 Cisco Adaptive Security Appliance Software 9.12.2.5 Cisco Adaptive Security Appliance Software 9.12.2.9 Cisco Adaptive Security Appliance Software 9.13 Cisco Adaptive Security Appliance Software 9.13.1 Cisco Adaptive Security Appliance Software 9.10 Cisco Adaptive Security Appliance Software 9.10.0 Cisco Adaptive Security Appliance Software 9.10.1 Cisco Adaptive Security Appliance Software 9.10.1.2 Cisco Adaptive Security Appliance Software 9.10.1.7 Cisco Adaptive Security Appliance Software 9.10.1.10 Cisco Adaptive Security Appliance Software 9.10.1.11 Cisco Adaptive Security Appliance Software 9.10.1.17 Cisco Adaptive Security Appliance Software 9.10.1.22 Cisco Adaptive Security Appliance Software 9.10.1.27 Cisco Adaptive Security Appliance Software 9.10.1.30 Cisco Adaptive Security Appliance Software 9.10.1.32	24
Application	Cisco Cisco Firepower Threat Defense - Cisco Firepower Threat Defense 5.3.0 Cisco Firepower Threat Defense 5.4.0 Cisco Firepower Threat Defense 6.0 Cisco Firepower Threat Defense 6.0.0 Cisco Firepower Threat Defense 6.0.0.1 Cisco Firepower Threat Defense 6.0.1 Cisco Firepower Threat Defense 6.0.1.1 Cisco Firepower Threat Defense 6.0.1.2 Cisco Firepower Threat Defense 6.0.1.3 Cisco Firepower Threat Defense 6.0.1.4 Cisco Firepower Threat Defense 6.1.0 Cisco Firepower Threat Defense 6.1.0.1 Cisco Firepower Threat Defense 6.1.0.2 Cisco Firepower Threat Defense 6.1.0.3 Cisco Firepower Threat Defense 6.1.0.4 Cisco Firepower Threat Defense 6.1.0.5 Cisco Firepower Threat Defense 6.1.0.6 Cisco Firepower Threat Defense 6.1.0.7 Cisco Firepower Threat Defense 6.2.0 Cisco Firepower Threat Defense 6.2.0.1 Cisco Firepower Threat Defense 6.2.0.2 Cisco Firepower Threat Defense 6.2.0.3 Cisco Firepower Threat Defense 6.2.0.4 Cisco Firepower Threat Defense 6.2.0.5 Cisco Firepower Threat Defense 6.2.0.6 Cisco Firepower Threat Defense 6.2.1 Cisco Firepower Threat Defense 6.2.2 Cisco Firepower Threat Defense 6.2.2.1 Cisco Firepower Threat Defense 6.2.2.2 Cisco Firepower Threat Defense 6.2.2.3 Cisco Firepower Threat Defense 6.2.2.4 Cisco Firepower Threat Defense 6.2.2.5 Cisco Firepower Threat Defense 6.2.3 Cisco Firepower Threat Defense 6.2.3.0 Cisco Firepower Threat Defense 6.2.3.1 Cisco Firepower Threat Defense 6.2.3.2 Cisco Firepower Threat Defense 6.2.3.3 Cisco Firepower Threat Defense 6.2.3.4 Cisco Firepower Threat Defense 6.2.3.5 Cisco Firepower Threat Defense 6.2.3.6 Cisco Firepower Threat Defense 6.2.3.7 Cisco Firepower Threat Defense 6.2.3.8 Cisco Firepower Threat Defense 6.2.3.9 Cisco Firepower Threat Defense 6.2.3.10 Cisco Firepower Threat Defense 6.2.3.11 Cisco Firepower Threat Defense 6.2.3.12 Cisco Firepower Threat Defense 6.2.3.13 Cisco Firepower Threat Defense 6.2.3.14 Cisco Firepower Threat Defense 6.2.3.15 Cisco Firepower Threat Defense 6.2.3.16 Cisco Firepower Threat Defense 6.2.3.17 Cisco Firepower Threat Defense 6.2.3.18 Cisco Firepower Threat Defense 6.3.0 Cisco Firepower Threat Defense 6.3.0.1 Cisco Firepower Threat Defense 6.3.0.2 Cisco Firepower Threat Defense 6.3.0.3 Cisco Firepower Threat Defense 6.3.0.4 Cisco Firepower Threat Defense 6.3.0.5 Cisco Firepower Threat Defense 6.3.0.6 Cisco Firepower Threat Defense 6.4.0 Cisco Firepower Threat Defense 6.4.0.1 Cisco Firepower Threat Defense 6.4.0.2 Cisco Firepower Threat Defense 6.4.0.3 Cisco Firepower Threat Defense 6.4.0.4 Cisco Firepower Threat Defense 6.4.0.5 Cisco Firepower Threat Defense 6.4.0.6 Cisco Firepower Threat Defense 6.4.0.7 Cisco Firepower Threat Defense 6.4.0.8 Cisco Firepower Threat Defense 6.4.0.9 Cisco Firepower Threat Defense 6.4.0.10 Cisco Firepower Threat Defense 6.4.0.11 Cisco Firepower Threat Defense 6.4.0.12 Cisco Firepower Threat Defense 6.4.0.13 Cisco Firepower Threat Defense 6.4.0.14 Cisco Firepower Threat Defense 6.4.1 Cisco Firepower Threat Defense 6.5.0 Cisco Firepower Threat Defense 6.5.0.1 Cisco Firepower Threat Defense 6.5.0.2 Cisco Firepower Threat Defense 6.5.0.3 Cisco Firepower Threat Defense 6.5.0.4 Cisco Firepower Threat Defense 6.5.0.5	82
Hardware	Cisco Cisco Firepower 2110 - Cisco Firepower 2120 - Cisco Firepower 2130 - Cisco Firepower 2140 -	4

Common Weakness Enumeration (CWE)

CWE-400 - Uncontrolled Resource Consumption ('Resource Exhaustion')

Common Attack Pattern Enumeration and Classification (CAPEC)

XML Ping of the Death
An attacker initiates a resource depletion attack where a large number of small XML messages are delivered at a sufficiently rapid rate to cause a denial of service or crash of the target. Transactions such as repetitive SOAP transactions can deplete resources faster than a simple flooding attack because of the additional resources used by the SOAP protocol and the resources necessary to process SOAP messages. The transactions used are immaterial as long as they cause resource utilization on the target. In other words, this is a normal flooding attack augmented by using messages that will require extra processing on the target.
XML Entity Expansion
An attacker submits an XML document to a target application where the XML document uses nested entity expansion to produce an excessively large output XML. XML allows the definition of macro-like structures that can be used to simplify the creation of complex structures. However, this capability can be abused to create excessive demands on a processor's CPU and memory. A small number of nested expansions can result in an exponential growth in demands on memory.
Inducing Account Lockout
An attacker leverages the security functionality of the system aimed at thwarting potential attacks to launch a denial of service attack against a legitimate system user. Many systems, for instance, implement a password throttling mechanism that locks an account after a certain number of incorrect log in attempts. An attacker can leverage this throttling mechanism to lock a legitimate user out of their own account. The weakness that is being leveraged by an attacker is the very security feature that has been put in place to counteract attacks.
Violating Implicit Assumptions Regarding XML Content (aka XML Denial of Service (XDoS))
XML Denial of Service (XDoS) can be applied to any technology that utilizes XML data. This is, of course, most distributed systems technology including Java, .Net, databases, and so on. XDoS is most closely associated with web services, SOAP, and Rest, because remote service requesters can post malicious XML payloads to the service provider designed to exhaust the service provider's memory, CPU, and/or disk space. The main weakness in XDoS is that the service provider generally must inspect, parse, and validate the XML messages to determine routing, workflow, security considerations, and so on. It is exactly these inspection, parsing, and validation routines that XDoS targets. There are three primary attack vectors that XDoS can navigate Target CPU through recursion: attacker creates a recursive payload and sends to service provider Target memory through jumbo payloads: service provider uses DOM to parse XML. DOM creates in memory representation of XML document, but when document is very large (for example, north of 1 Gb) service provider host may exhaust memory trying to build memory objects. XML Ping of death: attack service provider with numerous small files that clog the system. All of the above attacks exploit the loosely coupled nature of web services, where the service provider has little to no control over the service requester and any messages the service requester sends.

Nessus

NASL family	CISCO
NASL id	CISCO-SA-FP2100-ARP-DOS-KLDCK8KS-ASA.NASL
description	A denial of service vulnerability exists in the ARP packet processing component of Cisco Adaptive Security Appliance (ASA) software due to insufficient validation of ARP data. An unauthenticated, adjacent attacker can exploit this to cause to cause the system to stop responding. 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
last seen	2020-05-21
modified	2020-05-15
plugin id	136614
published	2020-05-15
reporter	This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
source	https://www.tenable.com/plugins/nessus/136614
title	Cisco Adaptive Security Appliance Denial of Service (cisco-sa-fp2100-arp-dos-kLdCK8ks)
code	#TRUSTED 56f464e6bbd1557bd32b0cd3342b630656adae6be71e5e11b4c4de2c25827f14b9d2ceb81db271258a62ce7f0e176073adce21a2f1c844edba3096490e7c67c3c1d8df01cca23be5cb878d7a3d279291f5beb0db878df9cd4bd50198504d6ca867762e53c8c7bcbc7a22bd5ecbbb9c083bb9b9ac3cc313355b40bf49e46484eb058dcb988c3e3dd580c2f9c54a4ad958c130bfb03d62ad1d6ad803792ddd80d011b58060068838ae9ba47842272c9d91e3e159c49f86dd469f26c1b3507922b4956bfc79593e18e7000b7769d5fba6c1f83fdb77097e17b4fc57fa910a6d8956257a7f820faccd471f5c6ee37da48f76b730d093c89231e95cff8364298aa5d64ac6951d4e2d78014ff87db5605ebed8c195e042f76759f6b11a996bdcadfe626d4a49fdc43c41061640f87f6bbc8ec26f1e0e2a9834c4831c5942fc8c62e39f79d3047e5870b6ca5d7411b45ec144168bbff8325d9a274fc2c7b55644893a64bd21c0a158ef188985991e1f31c5559d7fc312517a1b1b5eae9cde9603ffa258ffd2f1105bb1b83cc8d4bc4c7fb47e86b1c75e415a1b654d790ba4588a4a77f128e7b14b2157342ce5b424197e42b271aa8b2c485634f5328b791c1719211f82d201f1901a28d77189577589c532e7804406fae8684e810ef5094c856cae84a0d853a5e4dba0431b5ddc42ce7d8a65d7684cf32bec67f275ff9cd1680a370c84 # # (C) Tenable Network Security, Inc. # include('compat.inc'); if (description) { script_id(136614); script_version("1.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/18"); script_cve_id("CVE-2020-3334"); script_xref(name:"CISCO-BUG-ID", value:"CSCvq20910"); script_xref(name:"CISCO-BUG-ID", value:"CSCvr43476"); script_xref(name:"CISCO-BUG-ID", value:"CSCvr49833"); script_xref(name:"CISCO-SA", value:"cisco-sa-fp2100-arp-dos-kLdCK8ks"); script_xref(name:"IAVA", value:"2020-A-0205"); script_name(english:"Cisco Adaptive Security Appliance Denial of Service (cisco-sa-fp2100-arp-dos-kLdCK8ks)"); script_set_attribute(attribute:"synopsis", value: "The remote device is affected by a denial of service vulnerability"); script_set_attribute(attribute:"description", value: "A denial of service vulnerability exists in the ARP packet processing component of Cisco Adaptive Security Appliance (ASA) software due to insufficient validation of ARP data. An unauthenticated, adjacent attacker can exploit this to cause to cause the system to stop responding. 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-fp2100-arp-dos-kLdCK8ks script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?dfbfdb5b"); script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvq20910"); script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr43476"); script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr49833"); script_set_attribute(attribute:"solution", value: "Update to a fixed version based on your hardware. Please refer to Cisco bug IDs CSCvq20910, CSCvr43476 & CSCvr49833."); script_set_cvss_base_vector("CVSS2#AV:A/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:A/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-2020-3334"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/06"); script_set_attribute(attribute:"patch_publication_date", value:"2020/05/06"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/15"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:adaptive_security_appliance_software"); 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) 2020 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"); exit(0); } include('cisco_workarounds.inc'); include('ccf.inc'); product_info = cisco::get_product_info(name:'Cisco Adaptive Security Appliance (ASA) Software'); if (isnull(product_info['model']) \|\| product_info['model'] !~ "^21[0-9]{2}") audit(AUDIT_HOST_NOT, 'an affected model'); vuln_ranges = [ {'min_ver' : '0.0', 'fix_ver' : '9.10.1.37'}, {'min_ver' : '9.12', 'fix_ver' : '9.12.3'}, {'min_ver' : '9.13', 'fix_ver' : '9.13.1.2'} ]; reporting = make_array( 'port' , 0, 'severity' , SECURITY_WARNING, 'version' , product_info['version'], 'bug_id' , 'CSCvq20910, CSCvr43476, CSCvr49833' ); cisco::check_and_report( product_info:product_info, reporting:reporting, vuln_ranges:vuln_ranges );

NASL family	CISCO
NASL id	CISCO-SA-FP2100-ARP-DOS-KLDCK8KS-FTD.NASL
description	A denial of service vulnerability exists in the ARP packet processing component of Cisco Firepower Threat Defence (FTD) software due to insufficient validation of ARP data. An unauthenticated, adjacent attacker can exploit this to cause to cause the system to stop responding. 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
last seen	2020-05-21
modified	2020-05-15
plugin id	136615
published	2020-05-15
reporter	This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
source	https://www.tenable.com/plugins/nessus/136615
title	Cisco Firepower Threat Defense Denial of Service (DoS) (cisco-sa-fp2100-arp-dos-kLdCK8ks)

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fp2100-arp-dos-kLdCK8ks