CVE-2020-3174: Cisco NX-OS Software Anycast Gateway Invalid ARP Vulnerability
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2020-3174?
The severity of CVE-2020-3174 is rated as high, given its potential impact on network integrity.
How do I fix CVE-2020-3174?
To fix CVE-2020-3174, update the affected Cisco NX-OS Software versions to the latest recommended versions provided by Cisco.
Which Cisco NX-OS versions are affected by CVE-2020-3174?
CVE-2020-3174 affects Cisco NX-OS versions 8.1(1), 8.4(1), and 9.3(1).
Can CVE-2020-3174 be exploited remotely?
No, CVE-2020-3174 requires an unauthenticated adjacent attacker to exploit the vulnerability.
What type of attacks can CVE-2020-3174 enable?
CVE-2020-3174 can enable attackers to cause a device to learn invalid ARP entries, leading to potential traffic interception or denial of service.