CVE-2020-3231
Description
A vulnerability in the 802.1X feature of Cisco Catalyst 2960-L Series Switches and Cisco Catalyst CDB-8P Switches could allow an unauthenticated, adjacent attacker to forward broadcast traffic before being authenticated on the port. The vulnerability exists because broadcast traffic that is received on the 802.1X-enabled port is mishandled. An attacker could exploit this vulnerability by sending broadcast traffic on the port before being authenticated. A successful exploit could allow the attacker to send and receive broadcast traffic on the 802.1X-enabled port before authentication.
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco ios | 15.2\(5\)e2, 15.2\(5\)ex, 15.2\(5a\)e, 15.2\(5b\)e, 15.2\(5c\)e, 15.2\(6\)e, 15.2\(6\)e0c, 15.2\(6\)e1, 15.2\(6\)e1a, 15.2\(6\)e1s, 15.2\(6\)e2, 15.2\(6\)e2b, 15.2\(6\)e3, 15.2\(6\)e4, 15.2\(7\)e, 15.2\(7\)e0a, 15.2\(7\)e0b, 15.2\(7\)e0s, 15.2\(7a\)e0b, 15.2\(7b\)e0b, 15.3\(3\)jaa1, 15.3\(3\)jpj | — |
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