Improper access control in Cisco Nexus 9500 Series and Cisco NX-OS - CVE-2021-1591

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Main Vulnerability Database Vulnerabilities #VU56104

Improper access control in Cisco Nexus 9500 Series and Cisco NX-OS - CVE-2021-1591

Published: August 26, 2021


Vulnerability identifier: #VU56104
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-1591
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Cisco Nexus 9500 Series
Cisco NX-OS
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to oversubscription of resources that occurs when applying ACLs to port channel interfaces. A remote attacker can access network resources that would be protected by the ACL that was applied on the port channel interface.


Remediation

Install updates from vendor's website.

External links