A vulnerability in the Cisco Discovery Protocol feature of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper input validation of specific values that are within a Cisco Discovery Protocol message. 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 execute arbitrary code with root privileges or cause the Cisco Discovery Protocol process to crash and restart multiple times, which would cause the affected device to reload, resulting in a DoS condition. Note: 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).

According to its self-reported version, Cisco FXOS System Software is affected by a vulnerability due to improper input validation of specific values that are within a Cisco Discovery Protocol message. 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 execute arbitrary code with root privileges or cause the Cisco Discovery Protocol process to crash and restart multiple times, which would cause the affected device to reload, resulting in a DoS condition.

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

According to its self-reported version, Cisco NX-OS System Software with Cisco Discovery Protocol enabled is affected by a vulnerability due to improper input validation of specific values that are within a Cisco Discovery Protocol message.
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 execute arbitrary code with root privileges or cause the Cisco Discovery Protocol process to crash and restart multiple times, which would cause the affected device to reload, resulting in a DoS condition.

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

ID	Name	Product	Family	Type	Severity
164840	Cisco FXOS Software Cisco Discovery Protocol DoS Arbitrary Code Execution (cisco-sa-nxos-cdp-dos-ce-wWvPucC9)	Nessus	CISCO	Local	high
164453	Cisco NX-OS Software Cisco Discovery Protocol DoS Arbitrary Code Execution (cisco-sa-nxos-cdp-dos-ce-wWvPucC9)	Nessus	CISCO	Combined	high

Detections

Analytics

CVE-2022-20824

high

Tenable Plugins

high

high