Cisco NX-OS Anycast Gateway GARP Packet data authenticity

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Cisco NX-OS. The impacted element is an unknown function of the component Anycast Gateway. This manipulation as part of GARP Packet causes data authenticity. This vulnerability appears as CVE-2020-3174. The attacker needs to be present on the local network. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Cisco NX-OS (Router Operating System) (the affected version is unknown). Affected by this vulnerability is an unknown code of the component Anycast Gateway. The manipulation as part of a GARP Packet leads to a data authenticity vulnerability. The CWE definition for the vulnerability is CWE-345. The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data. As an impact it is known to affect integrity, and availability. The summary by CVE is:

A vulnerability in the anycast gateway feature of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a device to learn invalid Address Resolution Protocol (ARP) entries. The ARP entries are for nonlocal IP addresses for the subnet. The vulnerability is due to improper validation of a received gratuitous ARP (GARP) request. An attacker could exploit this vulnerability by sending a malicious GARP packet on the local subnet to cause the ARP table on the device to become corrupted. A successful exploit could allow the attacker to populate the ARP table with incorrect entries, which could lead to traffic disruptions.

The weakness was presented 02/26/2020 as cisco-sa-20200226-nxos-arp as confirmed advisory (Website). The advisory is shared at tools.cisco.com. This vulnerability is known as CVE-2020-3174 since 12/12/2019. The attack needs to be initiated within the local network. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

Upgrading eliminates this vulnerability.

See VDB-150554 and VDB-150549 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 6.1
VulDB Temp Score: 5.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔍

CNA Base Score: 4.7
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Data authenticity
CWE: CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/12/2019 🔍
02/26/2020 +76 days 🔍
02/27/2020 +1 days 🔍
04/06/2024 +1500 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20200226-nxos-arp
Status: Confirmed

CVE: CVE-2020-3174 (🔍)
GCVE (CVE): GCVE-0-2020-3174
GCVE (VulDB): GCVE-100-150553
See also: 🔍

Entryinfo

Created: 02/27/2020 07:07
Updated: 04/06/2024 09:28
Changes: 02/27/2020 07:07 (41), 02/27/2020 07:12 (12), 04/06/2024 09:28 (34)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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