CVE-2021-1591

published 2021-08-25

CVE-2021-1591: A vulnerability in the EtherChannel port subscription logic of Cisco Nexus 9500 Series Switches could allow an unauthenticated, remote attacker to bypass…

Priority P4 31 medium 5.3 CVSS 3.1

AV N AC L PR N UI N S U C N I L A N

A vulnerability in the EtherChannel port subscription logic of Cisco Nexus 9500 Series Switches could allow an unauthenticated, remote attacker to bypass access control list (ACL) rules that are configured on an affected device. This vulnerability is due to oversubscription of resources that occurs when applying ACLs to port channel interfaces. An attacker could exploit this vulnerability by attempting to access network resources that are protected by the ACL. A successful exploit could allow the attacker to access network resources that would be protected by the ACL that was applied on the port channel interface.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
cisco	cisco_nx-os_software	—	—
cisco	nexus_9500_series_switches	—	—
cisco	nx-os	—	—

CVSS provenance

nvd v3.1 5.3 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

nvd v2.0 5.0 MEDIUM AV:N/AC:L/Au:N/C:N/I:P/A:N

vendor_cisco 5.8 MEDIUM

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