CVE-2020-3566

high

Description

A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust process memory of an affected device. The vulnerability is due to insufficient queue management for Internet Group Management Protocol (IGMP) packets. An attacker could exploit this vulnerability by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to cause memory exhaustion, resulting in instability of other processes. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address this vulnerability.

From the Tenable Blog

CVE-2020-3566, CVE-2020-3569: Zero-Day Vulnerabilities in Cisco IOS XR Software Targeted in the Wild

Published: 2020-09-01

Cisco warns of two zero-day denial-of-service vulnerabilities in its IOS XR Software actively exploited in the wild. Update September 29, 2020: The Solutions section has been updated with details regarding patches that were released by Cisco.