CVE-2019-1596

Cisco NX-OS Software Bash Shell Privilege Escalation Vulnerability

Severity Score

7.8

*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 Bash shell implementation for Cisco NX-OS Software could allow an authenticated, local attacker to escalate their privilege level to root. The attacker must authenticate with valid user credentials. The vulnerability is due to incorrect permissions of a system executable. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the Bash prompt. A successful exploit could allow the attacker to escalate their privilege level to root. Nexus 3000 Series Switches are affected in versions prior to 7.0(3)I7(4). Nexus 3500 Platform Switches are affected in versions prior to 7.0(3)I7(4). Nexus 3600 Platform Switches are affected in versions prior to 7.0(3)F3(5). Nexus 9000 Series Switches in Standalone NX-OS Mode are affected in versions prior to 7.0(3)I7(4). Nexus 9500 R-Series Line Cards and Fabric Modules are affected in versions prior to 7.0(3)F3(5).

Una vulnerabilidad en la implementación shell "Bash" del software Cisco NX-OS podría permitir a un atacante local autenticado escalar su nivel de privilegios a root. El atacante deberá autenticarse con credenciales de usuario válidas. Esta vulnerabilidad se debe a permisos incorrectos de un ejecutable de sistema. Un atacante podría explotar esta vulnerabilidad autenticándose en el dispositivo ye introduciendo un comando manipulado en el aviso Bash. Un exploit exitoso podría permitir que el atacante escale sus privilegios a root. Los switches de Nexus 3000 Series se ven afectados en versiones anteriores a la 7.0(3)I7(4). Los switches de Nexus 3500 Platform se ven afectados en versiones anteriores a la 7.0(3)I7(4). Los switches de Nexus 3600 Platform se ven afectados en versiones anteriores a la 7.0(3)F3(5). Las versiones anteriores a la 70(3)I7(4) de Nexus 9000 Series Switches, en modo NX-OS Standalone, se ven afectadas. Los switches de 9500 R-Series Line Cards y Fabric Modules se ven afectados en versiones anteriores a la 7.0(3)F3(5).

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

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
2019-03-07 CVE Published
2023-03-08 EPSS Updated
2024-11-20 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-264: Permissions, Privileges, and Access Controls
CWE-732: Incorrect Permission Assignment for Critical Resource

CAPEC

References (2)

URL	Tag	Source
http://www.securityfocus.com/bid/107340	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxos-pe	2020-10-08

URL	Date	SRC

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\(9\) Search vendor "Cisco" for product "Nx-os" and version " < 7.0\(3\)i4\(9\)"	-	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\(3\)i5 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i5 < 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\(3\)i7 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i7 < 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\(3\)f3\(1\) < 7.0\(3\)f3\(5\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)f3\(1\) < 7.0\(3\)f3\(5\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 3600 Search vendor "Cisco" for product "Nexus 3600"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 7.0\(3\)i4\(9\) Search vendor "Cisco" for product "Nx-os" and version " < 7.0\(3\)i4\(9\)"	-	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\(3\)i5 < 7.0\(3\)i7\(4\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)i5 < 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\(3\)f3\(1\) < 7.0\(3\)f3\(5\) Search vendor "Cisco" for product "Nx-os" and version " >= 7.0\(3\)f3\(1\) < 7.0\(3\)f3\(5\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 9500 Search vendor "Cisco" for product "Nexus 9500"	-	-	Safe