Vulnerability identifier: #VU62337

Vulnerability risk: Medium

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-20692

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco IOS XE
Operating systems & Components / Operating system
Catalyst 3850 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 9200 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 9300 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 9400 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 9500 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 9500H Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 9600 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Cisco Systems, Inc

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources in the NETCONF over SSH feature. A remote user can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco IOS XE: 16.12.1

Catalyst 3850 Series Switches: All versions

Catalyst 9200 Series Switches: All versions

Catalyst 9300 Series Switches: All versions

Catalyst 9400 Series Switches: All versions

Catalyst 9500 Series Switches: All versions

Catalyst 9500H Series Switches: All versions

Catalyst 9600 Series Switches: All versions

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ncossh-dos-ZAkfOdq8

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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