CVE-2021-1540

Cisco ASR 5000 Series Software Authorization Bypass Vulnerabilities

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

Multiple vulnerabilities in the authorization process of Cisco ASR 5000 Series Software (StarOS) could allow an authenticated, remote attacker to bypass authorization and execute a subset of CLI commands on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

Múltiples vulnerabilidades en el proceso de autorización de Cisco ASR 5000 Series Software (StarOS), podría permitir a un atacante remoto autenticado omitir la autorización y ejecutar un subconjunto de comandos de CLI en un dispositivo afectado. Para obtener más información sobre estas vulnerabilidades, consulte la sección Detalles de este aviso

*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

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2020-11-13 CVE Reserved
2021-06-04 CVE Published
2023-08-27 EPSS Updated
2024-11-07 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-863: Incorrect Authorization

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-asr5k-autho-bypass-mJDF5S7n	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"	Staros Search vendor "Cisco" for product "Staros"	< 21.16.9 Search vendor "Cisco" for product "Staros" and version " < 21.16.9"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5000 Search vendor "Cisco" for product "Asr 5000"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	< 21.16.9 Search vendor "Cisco" for product "Staros" and version " < 21.16.9"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5500 Search vendor "Cisco" for product "Asr 5500"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	< 21.16.9 Search vendor "Cisco" for product "Staros" and version " < 21.16.9"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5700 Search vendor "Cisco" for product "Asr 5700"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.17.0 < 21.17.10 Search vendor "Cisco" for product "Staros" and version " >= 21.17.0 < 21.17.10"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5000 Search vendor "Cisco" for product "Asr 5000"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.17.0 < 21.17.10 Search vendor "Cisco" for product "Staros" and version " >= 21.17.0 < 21.17.10"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5500 Search vendor "Cisco" for product "Asr 5500"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.17.0 < 21.17.10 Search vendor "Cisco" for product "Staros" and version " >= 21.17.0 < 21.17.10"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5700 Search vendor "Cisco" for product "Asr 5700"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.18.0 < 21.18.16 Search vendor "Cisco" for product "Staros" and version " >= 21.18.0 < 21.18.16"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5000 Search vendor "Cisco" for product "Asr 5000"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.18.0 < 21.18.16 Search vendor "Cisco" for product "Staros" and version " >= 21.18.0 < 21.18.16"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5500 Search vendor "Cisco" for product "Asr 5500"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.18.0 < 21.18.16 Search vendor "Cisco" for product "Staros" and version " >= 21.18.0 < 21.18.16"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5700 Search vendor "Cisco" for product "Asr 5700"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.19.0 < 21.19.11 Search vendor "Cisco" for product "Staros" and version " >= 21.19.0 < 21.19.11"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5000 Search vendor "Cisco" for product "Asr 5000"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.19.0 < 21.19.11 Search vendor "Cisco" for product "Staros" and version " >= 21.19.0 < 21.19.11"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5500 Search vendor "Cisco" for product "Asr 5500"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.19.0 < 21.19.11 Search vendor "Cisco" for product "Staros" and version " >= 21.19.0 < 21.19.11"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5700 Search vendor "Cisco" for product "Asr 5700"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.19.n < 21.19.n7 Search vendor "Cisco" for product "Staros" and version " >= 21.19.n < 21.19.n7"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5000 Search vendor "Cisco" for product "Asr 5000"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.19.n < 21.19.n7 Search vendor "Cisco" for product "Staros" and version " >= 21.19.n < 21.19.n7"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5500 Search vendor "Cisco" for product "Asr 5500"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.19.n < 21.19.n7 Search vendor "Cisco" for product "Staros" and version " >= 21.19.n < 21.19.n7"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5700 Search vendor "Cisco" for product "Asr 5700"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.20.0 < 21.20.8 Search vendor "Cisco" for product "Staros" and version " >= 21.20.0 < 21.20.8"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5000 Search vendor "Cisco" for product "Asr 5000"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.20.0 < 21.20.8 Search vendor "Cisco" for product "Staros" and version " >= 21.20.0 < 21.20.8"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5500 Search vendor "Cisco" for product "Asr 5500"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	>= 21.20.0 < 21.20.8 Search vendor "Cisco" for product "Staros" and version " >= 21.20.0 < 21.20.8"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5700 Search vendor "Cisco" for product "Asr 5700"	-	-	Safe
Cisco Search vendor "Cisco"		Virtualized Packet Core Search vendor "Cisco" for product "Virtualized Packet Core"				-		-		Affected