Vulnerability identifier: #VU56102

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1586

CWE-ID: CWE-345

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Nexus 9000 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to compromsie the target system.

The vulnerability exists due to insufficient verification of data authenticity in the Multi-Pod or Multi-Site network configurations. A remote attacker can send specially crafted TCP data and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Nexus 9000 Series Switches: 15.0.2e - 15.1.1h

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n9kaci-tcp-dos-YXukt6gM

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.