Improper input validation in Cisco Catalyst 9800-40
CVE-2020-3390
A vulnerability in Simple Network Management Protocol (SNMP) trap generation for wireless clients of the Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family could allow an unauthenticated, adjacent attacker to cause the device to unexpectedly reload, causing a denial of service (DoS) condition on an affected device. The vulnerability is due to the lack of input validation of the information used to generate an SNMP trap in relation to a wireless client connection. An attacker could exploit this vulnerability by sending an 802.1x packet with crafted parameters during the wireless authentication setup phase of a connection. A successful exploit could allow the attacker to cause the device to reload, causing a DoS condition.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.006 (46.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-3390?
- CVE-2020-3390 is a high-severity vulnerability in Cisco Catalyst 9800-40, classified under Improper Input Validation. CVSS score: 7.4/10. Published 2020-09-24.
- How severe is CVE-2020-3390?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2020-3390 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.