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Medium severity4.7NVD Advisory· Published Jun 3, 2020· Updated Jun 17, 2026

CVE-2020-3231

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.

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Affected products

25
  • Cisco Systems, Inc./Cisco iOS22 versions
    cpe:2.3:o:cisco:ios:15.2\(5\)e2:*:*:*:*:*:*:*+ 21 more
    • cpe:2.3:o:cisco:ios:15.2\(5\)e2:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(5\)ex:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(5a\)e:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(5b\)e:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(5c\)e:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(6\)e:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(6\)e0c:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(6\)e1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(6\)e1a:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(6\)e1s:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(6\)e2:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(6\)e2b:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(6\)e3:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(6\)e4:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(7\)e:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(7\)e0a:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(7\)e0b:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(7\)e0s:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(7a\)e0b:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2\(7b\)e0b:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.3\(3\)jaa1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.3\(3\)jpj:*:*:*:*:*:*:*
  • Cisco Systems, Inc./Catalyst 2960-L Series Switchesllm-fuzzy
  • Cisco Systems, Inc./Catalyst Switchesllm-fuzzy
  • Cisco/Cisco IOS 15.2(5a)Ev5
    Range: n/a

Patches

Vulnerability mechanics

References

1

News mentions

0

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