CVE-2020-3516

Cisco IOS XE Software Web UI Improper Input Validation Vulnerability

Severity Score

4.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the web server authentication of Cisco IOS XE Software could allow an authenticated, remote attacker to crash the web server on the device. The vulnerability is due to insufficient input validation during authentication. An attacker could exploit this vulnerability by entering unexpected characters during a valid authentication. A successful exploit could allow the attacker to crash the web server on the device, which must be manually recovered by disabling and re-enabling the web server.

Una vulnerabilidad en la autenticación del servidor web de Cisco IOS XE Software, podría permitir a un atacante remoto autenticado bloquear el servidor web en el dispositivo. La vulnerabilidad es debido a una comprobación insuficiente de la entrada durante la autenticación. Un atacante podría explotar esta vulnerabilidad mediante el ingreso de caracteres inesperados durante una autenticación válida. Una explotación con éxito podría permitir al atacante bloquear el servidor web en el dispositivo, que debe ser recuperado manualmente al deshabilitarlo y volviendo a habilitar el servidor web.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-12-12 CVE Reserved
2020-09-24 CVE Published
2023-12-27 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

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-WEB-UI-exNFmcPO	2020-10-08

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"				< 16.9.6 Search vendor "Cisco" for product "Ios Xe" and version " < 16.9.6"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				>= 16.12.0 < 16.12.2 Search vendor "Cisco" for product "Ios Xe" and version " >= 16.12.0 < 16.12.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				>= 17.1.0 < 17.1.1 Search vendor "Cisco" for product "Ios Xe" and version " >= 17.1.0 < 17.1.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.1 Search vendor "Cisco" for product "Ios Xe" and version "17.2.1"		-		Affected