Vulnerability · Published Aug 27, 2020 · Assigned by cisco

CVE-2020-3338Cisco NX-OS Software IPv6 Protocol Independent Multicast Denial of Service Vulnerability

High 7.5

In plain English

A high-severity security flaw in Cisco NX-OS Software 5.2(1) from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.8% (higher than 78% of all known vulnerabilities).

Severity (CVSS 3.0)7.5High

Exploit odds (30 days)1.8%top 21.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco NX-OS Software 5.2(1)	n/a

Weakness: CWE-404 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

20200826 Cisco NX-OS Software IPv6 Protocol Independent Multicast Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO