CVE-2021-1435

Cisco IOS XE Software Web UI Command Injection Vulnerability

Severity Score

7.2

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track*

*SSVC

Descriptions

A vulnerability in the web UI of Cisco IOS XE Software could allow an authenticated, remote attacker to inject arbitrary commands that can be executed as the root user. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending a crafted request to the web UI of an affected device with arbitrary commands injected into a portion of the request. A successful exploit could allow the attacker to execute arbitrary commands as the root user.

Una vulnerabilidad en la Interfaz de Usuario Web del Software Cisco IOS XE, podría permitir a un atacante remoto autenticado inyectar comandos arbitrarios que se pueden ejecutar como usuario root. Esta vulnerabilidad es debido a una comprobación insuficiente de la entrada. Un atacante podría explotar esta vulnerabilidad mediante el envío de una petición diseñada a la Interfaz de Usuario Web de un dispositivo afectado con comandos arbitrarios inyectados en una parte de la petición. Una explotación con éxito podría permitir al atacante ejecutar comandos arbitrarios como usuario root

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Track*

Exploitation

None

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2020-11-13 CVE Reserved
2021-03-24 CVE Published
2023-10-24 EPSS Updated
2024-10-23 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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-iosxe-webcmdinjsh-UFJxTgZD	2021-03-29

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"				16.9.1 Search vendor "Cisco" for product "Ios Xe" and version "16.9.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.1a Search vendor "Cisco" for product "Ios Xe" and version "16.9.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.1b Search vendor "Cisco" for product "Ios Xe" and version "16.9.1b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.1c Search vendor "Cisco" for product "Ios Xe" and version "16.9.1c"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.1d Search vendor "Cisco" for product "Ios Xe" and version "16.9.1d"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.1s Search vendor "Cisco" for product "Ios Xe" and version "16.9.1s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.2 Search vendor "Cisco" for product "Ios Xe" and version "16.9.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.2a Search vendor "Cisco" for product "Ios Xe" and version "16.9.2a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.2s Search vendor "Cisco" for product "Ios Xe" and version "16.9.2s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.3 Search vendor "Cisco" for product "Ios Xe" and version "16.9.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.3a Search vendor "Cisco" for product "Ios Xe" and version "16.9.3a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.3h Search vendor "Cisco" for product "Ios Xe" and version "16.9.3h"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.3s Search vendor "Cisco" for product "Ios Xe" and version "16.9.3s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.4 Search vendor "Cisco" for product "Ios Xe" and version "16.9.4"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.4c Search vendor "Cisco" for product "Ios Xe" and version "16.9.4c"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.5 Search vendor "Cisco" for product "Ios Xe" and version "16.9.5"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.5f Search vendor "Cisco" for product "Ios Xe" and version "16.9.5f"		-		Affected
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"				16.10.1 Search vendor "Cisco" for product "Ios Xe" and version "16.10.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1a Search vendor "Cisco" for product "Ios Xe" and version "16.10.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1b Search vendor "Cisco" for product "Ios Xe" and version "16.10.1b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1c Search vendor "Cisco" for product "Ios Xe" and version "16.10.1c"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1d Search vendor "Cisco" for product "Ios Xe" and version "16.10.1d"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1e Search vendor "Cisco" for product "Ios Xe" and version "16.10.1e"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1f Search vendor "Cisco" for product "Ios Xe" and version "16.10.1f"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1g Search vendor "Cisco" for product "Ios Xe" and version "16.10.1g"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1s Search vendor "Cisco" for product "Ios Xe" and version "16.10.1s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.2 Search vendor "Cisco" for product "Ios Xe" and version "16.10.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.3 Search vendor "Cisco" for product "Ios Xe" and version "16.10.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1 Search vendor "Cisco" for product "Ios Xe" and version "16.11.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1a Search vendor "Cisco" for product "Ios Xe" and version "16.11.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1b Search vendor "Cisco" for product "Ios Xe" and version "16.11.1b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1c Search vendor "Cisco" for product "Ios Xe" and version "16.11.1c"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1s Search vendor "Cisco" for product "Ios Xe" and version "16.11.1s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.2 Search vendor "Cisco" for product "Ios Xe" and version "16.11.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.1v Search vendor "Cisco" for product "Ios Xe" and version "17.2.1v"		-		Affected