A vulnerability in the Protocol Independent Multicast (PIM) feature for IPv6 networks (PIM6) of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper error handling when processing inbound PIM6 packets. An attacker could exploit this vulnerability by sending multiple crafted PIM6 packets to an affected device. A successful exploit could allow the attacker to cause the PIM6 application to leak system memory. Over time, this memory leak could cause the PIM6 application to stop processing legitimate PIM6 traffic, leading to a DoS condition on the affected device.

According to its self-reported version, Cisco NX-OS Software is affected by a denial of service (DoS) vulnerability due to improper error handling when processing inbound PIM6 packets. An unauthenticated, remote attacker can exploit this, by sending multiple crafted PIM6 packets to an affected device, in order to cause the PIM6 application to leak system memory and stop processing legitimate PIM6 traffic, leading to a DoS condition on the affected device.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Detections

Analytics

CVE-2020-3338

high

Tenable Plugins

high