Input validation error in Cisco Catalyst 9200 Series Switches and Cisco IOS XE - CVE-2020-3527

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Main Vulnerability Database Vulnerabilities #VU47209

Input validation error in Cisco Catalyst 9200 Series Switches and Cisco IOS XE - CVE-2020-3527

Published: September 24, 2020 / Updated: September 30, 2020


Vulnerability identifier: #VU47209
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-3527
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the Polaris kernel. A remote attacker can send jumbo frames or frames larger than the configured MTU size to the management interface of this device and perform a denial of service (DoS) attack.


Affected software

Cisco Catalyst 9200 Series Switches
Cisco IOS XE

How to mitigate CVE-2020-3527

Install updates from vendor's website.

Cisco IOS XE - addressed in versions 16.9.5, 16.12.3

External References

Related Security Bulletins