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CVE-2021-1591

CVE information

Published

2 years ago

Last Modified

5 months ago

CVSSv2.0 Severity

Medium

CVSSv3.1 Severity

Medium

Impact Analysis

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Description

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..

CVSSv2.0 Score

Severity
Medium
Base Score
5/10
Exploit Score
10/10
Access Vector
Network
Access Complexity
Low
Authentication Required
None
Impact Score
2.9/10
Confidentiality Impact
None
Availability Impact
None
Integrity Impact
Partial

CVSSv3.1 Score

Severity
Medium
Base Score
5.3/10
Exploit Score
3.9/10
Access Vector
Network
Access Complexity
Low
Privileges Required
None
Impact Score
1.4/10
Confidentiality Impact
None
Availability Impact
None
Integrity Impact
Low
Scope
Unchanged
User Interaction
None

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:o:cisco:nx-os:9.3\(4\):*:*:*:*:*:*:*
  Yes
-
cpe:2.3:h:cisco:nexus_9500_16-slot:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:cisco:nexus_9500_4-slot:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:cisco:nexus_9500_8-slot:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:cisco:nexus_9504:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:cisco:nexus_9508:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:cisco:nexus_9516:-:*:*:*:*:*:*:*
  No
-

References