Vulnerability · Published Jun 3, 2020 · Assigned by cisco

CVE-2020-3231Cisco IOS Software for Catalyst 2960-L Series Switches and Catalyst CDB-8P Switches 802.1X Authentication Bypass Vulnerability

Medium 4.7

In plain English

A medium-severity improper access control in Cisco IOS 15.2(5a)E from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 39% of all known vulnerabilities).

Severity (CVSS 3.0)4.7Medium

Exploit odds (30 days)0.5%top 60.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco IOS 15.2(5a)E	n/a

Weakness: CWE-284 · Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

References

20200603 Cisco IOS Software for Catalyst 2960-L Series Switches and Catalyst CDB-8P Switches 802.1X Authentication Bypass Vulnerability vendor-advisory, x_refsource_CISCO