A vulnerability in the Cisco Discovery Protocol implementation for the Cisco IP Phone could allow an unauthenticated, adjacent attacker to remotely execute code with root privileges or cause a reload of an affected IP phone. The vulnerability is due to missing checks when processing Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a crafted Cisco Discovery Protocol packet to the targeted IP phone. A successful exploit could allow the attacker to remotely execute code with root privileges or cause a reload of an affected IP phone, resulting in a denial of service (DoS) condition. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##
include('compat.inc');
if (description)
{
script_id(502099);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/18");
script_cve_id("CVE-2020-3111");
script_xref(name:"CEA-ID", value:"CEA-2020-0016");
script_name(english:"Cisco IP Phones Remote Code Execution and Denial of Service (CVE-2020-3111)");
script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
script_set_attribute(attribute:"description", value:
"A vulnerability in the Cisco Discovery Protocol implementation for the
Cisco IP Phone could allow an unauthenticated, adjacent attacker to
remotely execute code with root privileges or cause a reload of an
affected IP phone. The vulnerability is due to missing checks when
processing Cisco Discovery Protocol messages. An attacker could
exploit this vulnerability by sending a crafted Cisco Discovery
Protocol packet to the targeted IP phone. A successful exploit could
allow the attacker to remotely execute code with root privileges or
cause a reload of an affected IP phone, resulting in a denial of
service (DoS) condition. Cisco Discovery Protocol is a Layer 2
protocol. To exploit this vulnerability, an attacker must be in the
same broadcast domain as the affected device (Layer 2 adjacent).
This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
# http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.html
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?57837047");
# https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-voip-phones-rce-dos
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9be06804");
script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:C/I:C/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:U/C:H/I:H/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-2020-3111");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_cwe_id(20);
script_set_attribute(attribute:"vuln_publication_date", value:"2020/02/05");
script_set_attribute(attribute:"patch_publication_date", value:"2020/02/05");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/03/18");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_6821_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_6841_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_6851_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_6861_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_6871_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_7811_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_7821_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_7841_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_7861_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_8811_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_8841_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_8845_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_8851_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_8861_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_8865_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:wireless_ip_phone_8821-ex_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:wireless_ip_phone_8821_firmware");
script_set_attribute(attribute:"generated_plugin", value:"former");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Tenable.ot");
script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("tenable_ot_api_integration.nasl");
script_require_keys("Tenable.ot/Cisco");
exit(0);
}
include('tenable_ot_cve_funcs.inc');
get_kb_item_or_exit('Tenable.ot/Cisco');
var asset = tenable_ot::assets::get(vendor:'Cisco');
var vuln_cpes = {
"cpe:/o:cisco:ip_phone_6821_firmware" :
{"versionEndExcluding" : "11.3(1)sr1", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:ip_phone_6841_firmware" :
{"versionEndExcluding" : "11.3(1)sr1", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:ip_phone_6851_firmware" :
{"versionEndExcluding" : "11.3(1)sr1", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:ip_phone_6861_firmware" :
{"versionEndExcluding" : "11.3(1)sr1", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:ip_phone_6871_firmware" :
{"versionEndExcluding" : "11.3(1)sr1", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:ip_phone_7811_firmware" :
{"versionEndExcluding" : "12.7(1)", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:ip_phone_7821_firmware" :
{"versionEndExcluding" : "12.7(1)", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:ip_phone_7841_firmware" :
{"versionEndExcluding" : "12.7(1)", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:ip_phone_7861_firmware" :
{"versionEndExcluding" : "12.7(1)", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:ip_phone_8811_firmware" :
{"versionEndExcluding" : "12.7(1)", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:ip_phone_8841_firmware" :
{"versionEndExcluding" : "12.7(1)", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:ip_phone_8851_firmware" :
{"versionEndExcluding" : "12.7(1)", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:ip_phone_8861_firmware" :
{"versionEndExcluding" : "12.7(1)", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:ip_phone_8845_firmware" :
{"versionEndExcluding" : "12.7(1)", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:ip_phone_8865_firmware" :
{"versionEndExcluding" : "12.7(1)", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:wireless_ip_phone_8821_firmware" :
{"versionEndExcluding" : "11.0(5)sr2", "family" : "CiscoIPPhones"},
"cpe:/o:cisco:wireless_ip_phone_8821-ex_firmware" :
{"versionEndExcluding" : "11.0(5)sr2", "family" : "CiscoIPPhones"}
};
tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_HOLE);
Vendor | Product | Version | CPE |
---|---|---|---|
cisco | ip_phone_6821_firmware | cpe:/o:cisco:ip_phone_6821_firmware | |
cisco | ip_phone_6841_firmware | cpe:/o:cisco:ip_phone_6841_firmware | |
cisco | ip_phone_6851_firmware | cpe:/o:cisco:ip_phone_6851_firmware | |
cisco | ip_phone_6861_firmware | cpe:/o:cisco:ip_phone_6861_firmware | |
cisco | ip_phone_6871_firmware | cpe:/o:cisco:ip_phone_6871_firmware | |
cisco | ip_phone_7811_firmware | cpe:/o:cisco:ip_phone_7811_firmware | |
cisco | ip_phone_7821_firmware | cpe:/o:cisco:ip_phone_7821_firmware | |
cisco | ip_phone_7841_firmware | cpe:/o:cisco:ip_phone_7841_firmware | |
cisco | ip_phone_7861_firmware | cpe:/o:cisco:ip_phone_7861_firmware | |
cisco | ip_phone_8811_firmware | cpe:/o:cisco:ip_phone_8811_firmware |