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Cisco NX-OS Malformed ARP Header Denial of Service Vulnerability
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
A vulnerability in Address Resolution Protocol (ARP) feature of the Cisco Nexus Operating System (NX- OS) could allow an unauthenticated, adjacent attacker to cause a partial denial of service (DoS) condition because the ARP process unexpectedly restarts. The vulnerability is due to improper input validation of the fields in the ARP packet header. An attacker could exploit this vulnerability by sending a crafted ARP packet from an adjacent network to the affected device. An exploit could allow the attacker to cause a partial DoS condition because the ARP process could unexpectedly restart when processing the crafted ARP packet. Cisco has confirmed the vulnerability and software updates are available. To exploit this vulnerability, an attacker must have access to the same broadcast or collision domain as the targeted device. This access requirement may reduce the likelihood of a successful exploit. Although the CVSS indicates that software updates are not available to fix this vulnerability, there are known fixed releases available for Cisco bug IDs CSCut25292.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
See the referenced vendor advisory for a solution.