CVE-2023-20040

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the NETCONF service of Cisco Network Services Orchestrator (NSO) could allow an authenticated, remote attacker to cause a denial of service (DoS) on an affected system that is running as the root user. To exploit this vulnerability, the attacker must be a member of the admin group.
This vulnerability exists because user-supplied input is not properly validated when NETCONF is used to upload packages to an affected device. An attacker could exploit this vulnerability by uploading a specially crafted package file. A successful exploit could allow the attacker to write crafted files to arbitrary locations on the filesystem or delete arbitrary files from the filesystem of an affected device, resulting in a DoS condition.
Note: By default, during install, Cisco NSO will be set up to run as the root user unless the --run-as-user option is used.

*Credits: N/A

CVSS Scores

NISTv3.1 5.5

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-10-27 CVE Reserved
2023-01-19 CVE Published
2024-08-02 CVE Updated
2024-08-11 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-23: Relative Path Traversal
CWE-434: Unrestricted Upload of File with Dangerous Type

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nso-path-trvsl-zjBeMkZg	2024-01-25

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Network Services Orchestrator Search vendor "Cisco" for product "Network Services Orchestrator"				>= 3.3 < 5.4.7 Search vendor "Cisco" for product "Network Services Orchestrator" and version " >= 3.3 < 5.4.7"		-		Affected
Cisco Search vendor "Cisco"		Network Services Orchestrator Search vendor "Cisco" for product "Network Services Orchestrator"				>= 5.5 < 5.5.6 Search vendor "Cisco" for product "Network Services Orchestrator" and version " >= 5.5 < 5.5.6"		-		Affected
Cisco Search vendor "Cisco"		Network Services Orchestrator Search vendor "Cisco" for product "Network Services Orchestrator"				>= 5.6 < 5.6.7 Search vendor "Cisco" for product "Network Services Orchestrator" and version " >= 5.6 < 5.6.7"		-		Affected
Cisco Search vendor "Cisco"		Network Services Orchestrator Search vendor "Cisco" for product "Network Services Orchestrator"				>= 5.7 < 5.7.4 Search vendor "Cisco" for product "Network Services Orchestrator" and version " >= 5.7 < 5.7.4"		-		Affected
Cisco Search vendor "Cisco"		Network Services Orchestrator Search vendor "Cisco" for product "Network Services Orchestrator"				5.8 Search vendor "Cisco" for product "Network Services Orchestrator" and version "5.8"		-		Affected