CVE-2017-3876

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the Event Management Service daemon (emsd) of Cisco IOS XR routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the affected device. The vulnerability is due to improper handling of gRPC requests. An attacker could exploit this vulnerability by repeatedly sending unauthenticated gRPC requests to the affected device. A successful exploit could allow the attacker to crash the device in such a manner that manual intervention is required to recover. This vulnerability affects all Cisco IOS XR platforms that are running release 6.1.1 of Cisco IOS XR Software when the gRPC service is enabled on the device. The gRPC service is not enabled by default. Cisco Bug IDs: CSCvb14441.

Una vulnerabilidad en el demonio Event Management Service (emsd) de los routers IOS XR de Cisco, podría permitir a un atacante remoto no autenticado causar una condición de denegación de servicio (DoS) en el dispositivo afectado. La vulnerabilidad es debido a un manejo inapropiado de las peticiones gRPC. Un atacante podría explotar esta vulnerabilidad mediante el envío repetitivo de peticiones gRPC no autenticadas hacia el dispositivo afectado. Una explotación con éxito podría permitir al atacante bloquear el dispositivo de tal manera que se requiera la intervención manual para recuperarse. Esta vulnerabilidad afecta a todas las Plataformas de IOS XR de Cisco que están ejecutando la versión 6.1.1 del software IOS XR de Cisco cuando el servicio gRPC esta habilitado en el dispositivo. El servicio gRPC no está habilitado por defecto. ID de bug de Cisco: CSCvb14441.

*Credits: N/A

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

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-12-21 CVE Reserved
2017-05-16 CVE Published
2023-03-07 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-399: Resource Management Errors

CAPEC

References (3)

URL	Tag	Source
http://www.securityfocus.com/bid/98284	Third Party Advisory
http://www.securitytracker.com/id/1038393	Vdb Entry

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170503-ios-xr	2019-10-03

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 Xr Search vendor "Cisco" for product "Ios Xr"				6.1.0 Search vendor "Cisco" for product "Ios Xr" and version "6.1.0"		-		Affected
Cisco Search vendor "Cisco"		Ios Xr Search vendor "Cisco" for product "Ios Xr"				6.1.1 Search vendor "Cisco" for product "Ios Xr" and version "6.1.1"		-		Affected