VulnerabilityModified

CVE-2020-3527

A vulnerability in the Polaris kernel of Cisco Catalyst 9200 Series Switches could allow an unauthenticated, remote attacker to crash the device.

HIGH 8.6EPSS 1.37%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.37%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 3.1: 8.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS: 1.37% probability · 70th percentile
CISA KEV: Not listed
Weakness: CWE-20, CWE-400
Affected: cisco/ios xe
Source: psirt@cisco.com

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.