CVE-2021-1594

Cisco Identity Services Engine Privilege Escalation Vulnerability

Severity Score

8.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the REST API of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to perform a command injection attack and elevate privileges to root. This vulnerability is due to insufficient input validation for specific API endpoints. An attacker in a man-in-the-middle position could exploit this vulnerability by intercepting and modifying specific internode communications from one ISE persona to another ISE persona. A successful exploit could allow the attacker to run arbitrary commands with root privileges on the underlying operating system. To exploit this vulnerability, the attacker would need to decrypt HTTPS traffic between two ISE personas that are located on separate nodes.

Una vulnerabilidad en la API REST de Cisco Identity Services Engine (ISE) podría permitir a un atacante remoto no autenticado llevar a cabo un ataque de inyección de comandos y elevar los privilegios a root. Esta vulnerabilidad es debido a una insuficiente comprobación de entradas para determinados endpoints de la API. Un atacante en una posición de tipo "man-in-the-middle" podría explotar esta vulnerabilidad al interceptar y modificar comunicaciones específicas de un personaje de ISE a otro personaje de ISE. Una explotación con éxito podría permitir al atacante ejecutar comandos arbitrarios con privilegios de root en el sistema operativo subyacente. Para explotar esta vulnerabilidad, el atacante tendría que descifrar el tráfico HTTPS entre dos personas ISE que se encuentran en nodos separados

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-11-13 CVE Reserved
2021-10-06 CVE Published
2024-06-21 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-266: Incorrect Privilege Assignment

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-ise-priv-esc-UwqPrBM3	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				>= 2.4.0 < 2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version " >= 2.4.0 < 2.6.0"		-		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.4\(0.902\) Search vendor "Cisco" for product "Identity Services Engine" and version "2.4\(0.902\)"		-		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6\(0.156\) Search vendor "Cisco" for product "Identity Services Engine" and version "2.6\(0.156\)"		-		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		-		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		patch1		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		patch2		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		patch3		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		patch5		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		patch6		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		patch7		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		patch8		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		patch9		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.7\(0.903\) Search vendor "Cisco" for product "Identity Services Engine" and version "2.7\(0.903\)"		-		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.7.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.7.0"		-		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.7.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.7.0"		patch1		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.7.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.7.0"		patch2		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.7.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.7.0"		patch3		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.7.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.7.0"		patch4		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				3.0\(0.458\) Search vendor "Cisco" for product "Identity Services Engine" and version "3.0\(0.458\)"		-		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				3.0.0 Search vendor "Cisco" for product "Identity Services Engine" and version "3.0.0"		-		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				3.0.0 Search vendor "Cisco" for product "Identity Services Engine" and version "3.0.0"		patch1		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				3.0.0 Search vendor "Cisco" for product "Identity Services Engine" and version "3.0.0"		patch2		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				3.0.0 Search vendor "Cisco" for product "Identity Services Engine" and version "3.0.0"		patch3		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				3.1\(0.440\) Search vendor "Cisco" for product "Identity Services Engine" and version "3.1\(0.440\)"		-		Affected