CVE-2019-12647

Cisco IOS and IOS XE Software IP Ident Denial of Service Vulnerability

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

A vulnerability in the Ident protocol handler of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability exists because the affected software incorrectly handles memory structures, leading to a NULL pointer dereference. An attacker could exploit this vulnerability by opening a TCP connection to specific ports and sending traffic over that connection. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition.

Una vulnerabilidad en el manejador del protocolo Ident de los Software Cisco IOS y IOS XE, podría permitir a un atacante remoto no autenticado causar la recarga de un dispositivo afectado. La vulnerabilidad se presenta porque el software afectado maneja incorrectamente las estructuras de la memoria, lo que conlleva a una desreferencia del puntero NULL. Un atacante podría explotar esta vulnerabilidad abriendo una conexión TCP en puertos específicos y mediante el envío de tráfico por medio de ésta conexión. Una explotación con éxito podría permitir al atacante causar que el dispositivo afectado se recargue, resultando en una condición de denegación de servicio (DoS).

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2019-06-04 CVE Reserved
2019-09-25 CVE Published
2023-03-07 EPSS Updated
2024-11-19 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-identd-dos	2019-10-09

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	1100 Search vendor "Cisco" for product "1100"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	4221 Search vendor "Cisco" for product "4221"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	4321 Search vendor "Cisco" for product "4321"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	4351 Search vendor "Cisco" for product "4351"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	4431 Search vendor "Cisco" for product "4431"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	4451-x Search vendor "Cisco" for product "4451-x"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1000 Search vendor "Cisco" for product "Asr 1000"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1001-hx Search vendor "Cisco" for product "Asr 1001-hx"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1001-x Search vendor "Cisco" for product "Asr 1001-x"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1002-hx Search vendor "Cisco" for product "Asr 1002-hx"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1002-x Search vendor "Cisco" for product "Asr 1002-x"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 900 Search vendor "Cisco" for product "Asr 900"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-10sz-pd Search vendor "Cisco" for product "Asr 920-10sz-pd"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-12cz-a Search vendor "Cisco" for product "Asr 920-12cz-a"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-12cz-d Search vendor "Cisco" for product "Asr 920-12cz-d"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-12sz-im Search vendor "Cisco" for product "Asr 920-12sz-im"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-24sz-im Search vendor "Cisco" for product "Asr 920-24sz-im"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-24sz-m Search vendor "Cisco" for product "Asr 920-24sz-m"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-24tz-m Search vendor "Cisco" for product "Asr 920-24tz-m"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-4sz-a Search vendor "Cisco" for product "Asr 920-4sz-a"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-4sz-d Search vendor "Cisco" for product "Asr 920-4sz-d"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Cloud Services Router 1000v Search vendor "Cisco" for product "Cloud Services Router 1000v"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Ncs 4201 Search vendor "Cisco" for product "Ncs 4201"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Ncs 4202 Search vendor "Cisco" for product "Ncs 4202"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Ncs 4206 Search vendor "Cisco" for product "Ncs 4206"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Ncs 4216 Search vendor "Cisco" for product "Ncs 4216"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.7.1"	-	Affected	in	Cisco Search vendor "Cisco"	Network Convergence System 520 Search vendor "Cisco" for product "Network Convergence System 520"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	1100 Search vendor "Cisco" for product "1100"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	4221 Search vendor "Cisco" for product "4221"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	4321 Search vendor "Cisco" for product "4321"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	4351 Search vendor "Cisco" for product "4351"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	4431 Search vendor "Cisco" for product "4431"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	4451-x Search vendor "Cisco" for product "4451-x"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1000 Search vendor "Cisco" for product "Asr 1000"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1001-hx Search vendor "Cisco" for product "Asr 1001-hx"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1001-x Search vendor "Cisco" for product "Asr 1001-x"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1002-hx Search vendor "Cisco" for product "Asr 1002-hx"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1002-x Search vendor "Cisco" for product "Asr 1002-x"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 900 Search vendor "Cisco" for product "Asr 900"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-10sz-pd Search vendor "Cisco" for product "Asr 920-10sz-pd"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-12cz-a Search vendor "Cisco" for product "Asr 920-12cz-a"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-12cz-d Search vendor "Cisco" for product "Asr 920-12cz-d"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-12sz-im Search vendor "Cisco" for product "Asr 920-12sz-im"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-24sz-im Search vendor "Cisco" for product "Asr 920-24sz-im"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-24sz-m Search vendor "Cisco" for product "Asr 920-24sz-m"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-24tz-m Search vendor "Cisco" for product "Asr 920-24tz-m"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-4sz-a Search vendor "Cisco" for product "Asr 920-4sz-a"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 920-4sz-d Search vendor "Cisco" for product "Asr 920-4sz-d"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Cloud Services Router 1000v Search vendor "Cisco" for product "Cloud Services Router 1000v"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Ncs 4201 Search vendor "Cisco" for product "Ncs 4201"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Ncs 4202 Search vendor "Cisco" for product "Ncs 4202"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Ncs 4206 Search vendor "Cisco" for product "Ncs 4206"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Ncs 4216 Search vendor "Cisco" for product "Ncs 4216"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	fuji-16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "fuji-16.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Network Convergence System 520 Search vendor "Cisco" for product "Network Convergence System 520"	-	-	Safe