Vulnerability · Published Sep 24, 2020 · Assigned by cisco

CVE-2020-3527Cisco Catalyst 9200 Series Switches Jumbo Frame Denial of Service Vulnerability

High 8.6

In plain English

A high-severity improper input validation in Cisco IOS XE 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 1.4% (higher than 72% of all known vulnerabilities).

Severity (CVSS 3.0)8.6High

Exploit odds (30 days)1.4%top 27.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability in the Polaris kernel of Cisco Catalyst 9200 Series Switches could allow an unauthenticated, remote attacker to crash the device. The vulnerability is due to insufficient packet size validation. An attacker could exploit this vulnerability by sending jumbo frames or frames larger than the configured MTU size to the management interface of this device. A successful exploit could allow the attacker to crash the device fully before an automatic recovery.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco IOS XE Software	n/a

Weakness: CWE-20 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

References

20200924 Cisco Catalyst 9200 Series Switches Jumbo Frame Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO