Denial of service in Cisco Nexus 9000 Series Switches

1) Resource management error

EUVDB-ID: #VU60841

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-2022-20623

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to a logic error in the Bidirectional Forwarding Detection (BFD) rate limiter functionality. A remote attacker can send a crafted IPv4 or IPv6 stream of traffic through the device and perform a denial of service attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco NX-OS: before 9.3(8)

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-bfd-dos-wGQXrzxn
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx75912

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.