Input validation error in Cisco Systems, Inc products - CVE-2021-1523

Vulnerability identifier: #VU56103

CSH Severity: Medium

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2021-1523

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Cisco Nexus 9000 Series Switches
N9K-C9372PX-E
N9K-C9372TX-E
N9K-C9332PQ
N9K-C9372PX
N9K-C9372TX
N9K-C9396PX
N9K-C9396TX
N9K-C93128TX
N9K-C93120TX

Software vendor:
Cisco Systems, Inc

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to mishandling of ingress TCP traffic to a specific port. A remote attacker can send a specially crafted TCP packet and perform a denial of service (DoS) attack.

Install updates from vendor's website.

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n9kaci-queue-wedge-cLDDEfKF