Cisco NX-OS CLI os command injection

Summaryinfo

A vulnerability was found in Cisco NX-OS. It has been rated as critical. Impacted is an unknown function of the component CLI. The manipulation leads to os command injection. This vulnerability is uniquely identified as CVE-2019-1776. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability was found in Cisco NX-OS (Router Operating System) (version unknown). It has been rated as critical. This issue affects an unknown function of the component CLI. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in the CLI of Cisco NX-OS Software could allow an authenticated, local attacker to execute arbitrary commands on the underlying Linux operating system with a privilege level of root. The vulnerability is due to insufficient validation of arguments passed to a specific CLI command on the affected device. An attacker could exploit this vulnerability by including malicious input as the argument of an affected command. A successful exploit could allow the attacker to execute arbitrary commands on the underlying Linux operating system with elevated privileges. An attacker would need valid administrator credentials to exploit this vulnerability.

The bug was discovered 05/15/2019. The weakness was disclosed 05/15/2019 as cisco-sa-20190515-nxos-cmdinj- as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. The identification of this vulnerability is CVE-2019-1776 since 12/06/2018. Attacking locally is a requirement. The successful exploitation requires a simple authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/21/2023). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• NX-OS

License

• commercial

Website

• Vendor: https://www.cisco.com/

CPE 2.3info

• 🔍

CPE 2.2info

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