CVE-2019-1732

Cisco NX-OS Software Remote Package Manager Command Injection Vulnerability

Severity Score

6.4

*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 Remote Package Manager (RPM) subsystem of Cisco NX-OS Software could allow an authenticated, local attacker with administrator credentials to leverage a time-of-check, time-of-use (TOCTOU) race condition to corrupt local variables, which could lead to arbitrary command injection. The vulnerability is due to the lack of a proper locking mechanism on critical variables that need to stay static until used. An attacker could exploit this vulnerability by authenticating to an affected device and issuing a set of RPM-related CLI commands. A successful exploit could allow the attacker to perform arbitrary command injection. The attacker would need administrator credentials for the targeted device.

Una vulnerabilidad en el subsistema Remote Package Manager (RPM) del software NX-OS de Cisco podría permitir que un atacante local autorizado con credenciales de administrador explote una condición de carrera de tiempo de comprobación (TOCTOU) para corromper las variables locales , lo que podría dar lugar a una inyección de mando arbitraria. La vulnerabilidad se debe a la falta de un mecanismo de bloqueo adecuado en las variables críticas que deben permanecer estáticas hasta su uso. Un atacante podría explotar esta vulnerabilidad identificandose en un dispositivo afectado y emitiendo un conjunto de comandos CLI relacionados con RPM. Un ataque con éxito podría permitir al atacante realizar una inyección de comando arbitraria. El atacante podría necesitar credenciales de administrador para el dispositivo de destino.

*Credits: N/A

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

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

2018-12-06 CVE Reserved
2019-05-15 CVE Published
2023-03-08 EPSS Updated
2024-11-20 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-667: Improper Locking

CAPEC

References (2)

URL	Tag	Source
http://www.securityfocus.com/bid/108361	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-nxos-rpm-injec	2021-11-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 3000 Search vendor "Cisco" for product "Nexus 3000"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 3100 Search vendor "Cisco" for product "Nexus 3100"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 3100-z Search vendor "Cisco" for product "Nexus 3100-z"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 3100v Search vendor "Cisco" for product "Nexus 3100v"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 3200 Search vendor "Cisco" for product "Nexus 3200"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 3400 Search vendor "Cisco" for product "Nexus 3400"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 3500 Search vendor "Cisco" for product "Nexus 3500"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 3524-x Search vendor "Cisco" for product "Nexus 3524-x"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 3524-xl Search vendor "Cisco" for product "Nexus 3524-xl"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 3548-x Search vendor "Cisco" for product "Nexus 3548-x"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 3548-xl Search vendor "Cisco" for product "Nexus 3548-xl"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 9000 Search vendor "Cisco" for product "Nexus 9000"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 9200 Search vendor "Cisco" for product "Nexus 9200"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 9300 Search vendor "Cisco" for product "Nexus 9300"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 9500 Search vendor "Cisco" for product "Nexus 9500"	-	-	Safe
Cisco Search vendor "Cisco"	Nx Os Search vendor "Cisco" for product "Nx Os"	>= 7.0\(3\) < 7.0\(3\)f3\(5\) Search vendor "Cisco" for product "Nx Os" and version " >= 7.0\(3\) < 7.0\(3\)f3\(5\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 3600 Search vendor "Cisco" for product "Nexus 3600"	-	-	Safe