CVE-2022-20676

Cisco IOS XE Software Tool Command Language Privilege Escalation Vulnerability

Severity Score

6.7

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the Tool Command Language (Tcl) interpreter of Cisco IOS XE Software could allow an authenticated, local attacker to escalate from privilege level 15 to root-level privileges. This vulnerability is due to insufficient input validation of data that is passed into the Tcl interpreter. An attacker could exploit this vulnerability by loading malicious Tcl code on an affected device. A successful exploit could allow the attacker to execute arbitrary commands as root. By default, Tcl shell access requires privilege level 15.

Una vulnerabilidad en el intérprete de Tool Command Language (Tcl) del software Cisco IOS XE podría permitir a un atacante local autenticado escalar desde el nivel de privilegio 15 a privilegios de nivel root. Esta vulnerabilidad es debido a que no ha sido suficientemente la entrada de datos que son pasados al intérprete Tcl. Un atacante podría explotar esta vulnerabilidad cargando código Tcl malicioso en un dispositivo afectado. Una explotación con éxito podría permitir al atacante ejecutar comandos arbitrarios como root. Por defecto, el acceso al shell Tcl requiere un nivel de privilegio 15

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

None

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-11-02 CVE Reserved
2022-04-15 CVE Published
2023-03-08 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-250: Execution with Unnecessary Privileges

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-priv-esc-grbtubU	2024-03-06

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"				16.12.1z2 Search vendor "Cisco" for product "Ios Xe" and version "16.12.1z2"		-		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
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.1a Search vendor "Cisco" for product "Ios Xe" and version "17.2.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.1r Search vendor "Cisco" for product "Ios Xe" and version "17.2.1r"		-		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
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.2 Search vendor "Cisco" for product "Ios Xe" and version "17.2.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.3 Search vendor "Cisco" for product "Ios Xe" and version "17.2.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.1 Search vendor "Cisco" for product "Ios Xe" and version "17.3.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.1a Search vendor "Cisco" for product "Ios Xe" and version "17.3.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.1w Search vendor "Cisco" for product "Ios Xe" and version "17.3.1w"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.1x Search vendor "Cisco" for product "Ios Xe" and version "17.3.1x"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.1z Search vendor "Cisco" for product "Ios Xe" and version "17.3.1z"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.2 Search vendor "Cisco" for product "Ios Xe" and version "17.3.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.2a Search vendor "Cisco" for product "Ios Xe" and version "17.3.2a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.3 Search vendor "Cisco" for product "Ios Xe" and version "17.3.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.3a Search vendor "Cisco" for product "Ios Xe" and version "17.3.3a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.4 Search vendor "Cisco" for product "Ios Xe" and version "17.3.4"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.4a Search vendor "Cisco" for product "Ios Xe" and version "17.3.4a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.4b Search vendor "Cisco" for product "Ios Xe" and version "17.3.4b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.4c Search vendor "Cisco" for product "Ios Xe" and version "17.3.4c"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.4.1 Search vendor "Cisco" for product "Ios Xe" and version "17.4.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.4.1a Search vendor "Cisco" for product "Ios Xe" and version "17.4.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.4.1b Search vendor "Cisco" for product "Ios Xe" and version "17.4.1b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.4.1c Search vendor "Cisco" for product "Ios Xe" and version "17.4.1c"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.4.2 Search vendor "Cisco" for product "Ios Xe" and version "17.4.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.4.2a Search vendor "Cisco" for product "Ios Xe" and version "17.4.2a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.5.1 Search vendor "Cisco" for product "Ios Xe" and version "17.5.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.5.1a Search vendor "Cisco" for product "Ios Xe" and version "17.5.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.5.1c Search vendor "Cisco" for product "Ios Xe" and version "17.5.1c"		-		Affected