CVE-2020-3174 Cisco NX-OS Software Anycast Gateway Invalid ARP Vulnerability

What is CVE-2020-3174?

CVE-2020-3174 is a medium-severity vulnerability in Cisco Nx-Os, published on 26 Feb 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-345

Which versions are affected by CVE-2020-3174?

It affects 1 product.

Products include Cisco Nx-Os.

How do I fix CVE-2020-3174?

No fix has been published for CVE-2020-3174 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-3174 being exploited?

There is no known exploitation of CVE-2020-3174 in the wild and no public exploit code.

Other vulnerabilities in Cisco Nx-Os

• CVE-2024-20399 Cisco NX-OS Command Injection Exploited Medium 6.0
• CVE-2021-1361 Cisco NX-OS Software Unauthenticated Arbitrary File Actions Vulnerability Critical 9.8
• CVE-2018-0301 Memory corruption in Cisco NX-OS unknown Critical 9.8
• CVE-2016-1453 Memory corruption in n/a Critical 9.8
• CVE-2016-1341 Hardcoded credentials in n/a Critical 9.8

All Cisco Nx-Os vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-44pg-r8gr-j75x.