Vulnerability identifier: #VU81257

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-2023-20033

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Catalyst 3650 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 3850 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco IOS XE
Operating systems & Components / Operating system

Vendor: Cisco Systems, Inc

Description

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

The vulnerability exists due to improper management of internal resources when processing traffic that is received on the management interface. A remote attacker can send specially crafted data to the device and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Catalyst 3650 Series Switches: All versions

Catalyst 3850 Series Switches: All versions

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External links
http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat3k-dos-ZZA4Gb3r
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCwe60256

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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.