Cisco NX-OS Software up to 10.5(1) Ethernet Frame insufficient granularity of access control

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6.8	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in Cisco NX-OS Software. This affects an unknown part of the component Ethernet Frame Handler. Executing a manipulation can lead to insufficient granularity of access control. This vulnerability is registered as CVE-2025-20111. The attack requires access to the local network. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Cisco NX-OS Software. This vulnerability affects an unknown function of the component Ethernet Frame Handler. The manipulation with an unknown input leads to a insufficient granularity of access control vulnerability. The CWE definition for the vulnerability is CWE-1220. The product implements access controls via a policy or other feature with the intention to disable or restrict accesses (reads and/or writes) to assets in a system from untrusted agents. However, implemented access controls lack required granularity, which renders the control policy too broad because it allows accesses from unauthorized agents to the security-sensitive assets. As an impact it is known to affect availability. CVE summarizes:

A vulnerability in the health monitoring diagnostics of Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, adjacent attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of specific Ethernet frames. An attacker could exploit this vulnerability by sending a sustained rate of crafted Ethernet frames to an affected device. A successful exploit could allow the attacker to cause the device to reload.

The advisory is shared for download at sec.cloudapps.cisco.com. This vulnerability was named CVE-2025-20111 since 10/10/2024. The exploitation appears to be easy. The attack needs to approached within the local network. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 216942 (Cisco Nexus 3000 9000 Series Switches Health Monitoring Diagnostics DoS (cisco-sa-n3kn9k-healthdos-eOqSWK4g)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (216942). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• NX-OS Software

Version

• 9.3(1)
• 9.3(1z)
• 9.3(2)
• 9.3(3)
• 9.3(4)
• 9.3(5)
• 9.3(5w)
• 9.3(6)
• 9.3(7)
• 9.3(7a)
• 9.3(7k)
• 9.3(8)
• 9.3(9)
• 9.3(10)
• 9.3(11)
• 9.3(12)
• 9.3(13)
• 9.3(14)
• 10.1(1)
• 10.1(2)
• 10.1(2t)
• 10.2(1)
• 10.2(1q)
• 10.2(2)
• 10.2(2a)
• 10.2(3)
• 10.2(3t)
• 10.2(3v)
• 10.2(4)
• 10.2(5)
• 10.2(6)
• 10.2(7)
• 10.2(8)
• 10.3(1)
• 10.3(2)
• 10.3(3)
• 10.3(3o)
• 10.3(3p)
• 10.3(3q)
• 10.3(3r)
• 10.3(3w)
• 10.3(3x)
• 10.3(4)
• 10.3(4a)
• 10.3(4g)
• 10.3(4h)
• 10.3(5)
• 10.3(99w)
• 10.3(99x)
• 10.4(1)
• 10.4(2)
• 10.4(3)
• 10.5(1)

License

• commercial

Website

• Vendor: https://www.cisco.com/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.4
CNA Vector (cisco): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Insufficient granularity of access control
CWE: CWE-1220 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 216942
Nessus Name: Cisco Nexus 3000 9000 Series Switches Health Monitoring Diagnostics DoS (cisco-sa-n3kn9k-healthdos-eOqSWK4g)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/10/2024 🔍
02/26/2025 +139 days 🔍
02/26/2025 +0 days 🔍
02/28/2025 +2 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-n3kn9k-healthdos-eOqSWK4g
Status: Confirmed

CVE: CVE-2025-20111 (🔍)
GCVE (CVE): GCVE-0-2025-20111
GCVE (VulDB): GCVE-100-297640

Entryinfo

Created: 02/26/2025 18:50
Updated: 02/28/2025 20:34
Changes: 02/26/2025 18:50 (64), 02/28/2025 20:34 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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