A denial of service (DoS) vulnerability and remote code execution (RCE) exists in Cisco IP Phones due to missing checks when processing Cisco Discovery Protocol messages. An unauthenticated attacker can 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.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

According to its self-reported version, the Cisco NX-OS Software is affected by a denial of service vulnerability within the Cisco Discovery Protocol due to missing a check when processing protocol messages. An unauthenticated, adjacent attacker can exploit this to cause the device to reboot.

Please see the included Cisco BIDs and Cisco Security Advisory for more information

According to its self-reported version, Cisco FXOS Software is affected by a denial of service vulnerability within the Cisco Discovery Protocol due to missing a check when processing protocol messages. An unauthenticated, adjacent attacker can exploit this to cause the device to reboot.

Please see the included Cisco BIDs and Cisco Security Advisory for more information

According to its self-reported version, the Cisco IOS XR Software is affected by a remote code execution vulnerability within the Cisco Discovery Protocol due to improper validation of string input. An unauthenticated, adjacent attacker can exploit this to bypass authentication and execute arbitrary commands with root privileges.

Please see the included Cisco BIDs and Cisco Security Advisory for more information

According to its self-reported version, the Cisco IOS XR Software is affected by a denial of service vulnerability within the Cisco Discovery Protocol due to missing a check when processing protocol messages. An unauthenticated, adjacent attacker can exploit this to cause the device to reboot.

Please see the included Cisco BIDs and Cisco Security Advisory for more information

According to its self-reported version, the Cisco NX-OS System Software is affected by a remote code execution vulnerability within the Cisco Discovery Protocol due to improper validation of input. An unauthenticated, adjacent attacker can exploit this to bypass authentication and execute arbitrary commands with root privileges.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

According to its self-reported version, the Cisco IOS XR Software is affected by a remote code execution vulnerability within the Cisco Discovery Protocol due to improper validation of string input. An unauthenticated, adjacent attacker can exploit this to bypass authentication and execute arbitrary commands with root privileges.

According to its self-reported version, the Cisco IOS XR Software is affected by a denial of service vulnerability within the Cisco Discovery Protocol due to missing a check when processing protocol messages. An unauthenticated, adjacent attacker can exploit this to cause the device to reboot.

A vulnerability in the Cisco Discovery Protocol implementation for Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device. The vulnerability exists because the Cisco Discovery Protocol parser does not properly validate input for certain fields in a Cisco Discovery Protocol message. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. An successful exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges on an affected device. 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.

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.

A vulnerability in the Cisco Discovery Protocol implementation for Cisco FXOS Software, Cisco IOS XR Software, and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition.
The vulnerability is due to a missing check when the affected software processes Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to exhaust system memory, causing the device to reload. 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.

ID	Name	Product	Family	Published	Updated	Severity
142018	Cisco IP Phones Web Server RCE and DOS (cisco-sa-20200205-voip-phones-rce-dos)	Nessus	CISCO	10/28/2020	5/25/2023	high
133722	Cisco NX-OS Software Cisco Discovery Protocol Denial of Service Vulnerability (cisco-sa-20200205-fxnxos-iosxr-cdp-dos)	Nessus	CISCO	2/14/2020	12/6/2022	medium
133720	Cisco FXOS Software Cisco Discovery Protocol Denial of Service Vulnerability (cisco-sa-20200205-fxnxos-iosxr-cdp-dos)	Nessus	CISCO	2/14/2020	12/6/2022	medium
133603	Cisco IOS XR Software Cisco Discovery Protocol Remote Code Execution Vulnerability (cisco-sa-20200205-iosxr-cdp-rce)	Nessus	CISCO	2/10/2020	4/25/2023	high
133721	Cisco IOS XR Software Cisco Discovery Protocol Denial of Service Vulnerability (cisco-sa-20200205-fxnxos-iosxr-cdp-dos)	Nessus	CISCO	2/14/2020	12/6/2022	medium
133604	Cisco NX-OS Software Cisco Discovery Protocol Remote Code Execution Vulnerability (cisco-sa-20200205-nxos-cdp-rce)	Nessus	CISCO	2/10/2020	12/6/2022	high
701265	Cisco IOS XR Software Cisco Discovery Protocol RCE (cisco-sa-20200205-iosxr-cdp-rce)	Nessus Network Monitor	SNMP	2/18/2020	8/18/2020	high
701266	Cisco IOS XR Software Cisco Discovery Protocol DoS (cisco-sa-20200205-fxnxos-iosxr-cdp-dos)	Nessus Network Monitor	SNMP	2/18/2020	2/18/2020	medium
501357	Cisco NX-OS Software Cisco Discovery Protocol Remote Code Execution (CVE-2020-3119)	Tenable OT Security	Tenable.ot	7/25/2023	7/26/2023	high
502099	Cisco IP Phones Remote Code Execution and Denial of Service (CVE-2020-3111)	Tenable OT Security	Tenable.ot	3/18/2024	3/18/2024	high
501267	Cisco FXOS, IOS XR, and NX-OS Software Cisco Discovery Protocol Denial of Service (CVE-2020-3120)	Tenable OT Security	Tenable.ot	7/25/2023	7/26/2023	medium

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