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Cisco NX-OS Internet Group Management Protocol 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 the Internet Group Management Protocol version 3 (IGMPv3) input packet processing of Cisco NX-OS could allow an unauthenticated, adjacent attacker to cause the IGMP process to restart due to a malformed IGMP packet, which could cause a denial of service (DoS) condition on the device. The vulnerability is due to improper input validation when ensuring the memory allocated is large enough for the number of included sources in the IGMPv3 packet. An attacker could exploit this vulnerability by sending a crafted IGMPv3 packet to the targeted device. An exploit could allow the attacker to cause the IGMP process to restart due to a buffer overflow, which may cause a DoS condition. Cisco has confirmed the vulnerability. Software updates are available. An unauthenticated, adjacent attacker could use this vulnerability if the targeted device's IGMPv3 snooping is configured on one or more VLANs and running the affected version of the software. To exploit this vulnerability, an attacker must be on the same broadcast or collision domain as the affected device. This access requirement could decrease the likelihood of a successful exploit.
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.