Vulnerability · Published Feb 24, 2021 · Assigned by cisco

CVE-2021-1367Cisco NX-OS Software Protocol Independent Multicast Denial of Service Vulnerability

Medium 4.3

In plain English

A medium-severity improper input validation in Cisco NX-OS Software from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.4%top 65.0% 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 of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending a crafted PIM packet to an affected device. A successful exploit could allow the attacker to cause a traffic loop, resulting in a DoS condition.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco NX-OS Software	n/a

Weakness: CWE-20 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

20210224 Cisco NX-OS Software Protocol Independent Multicast Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO