Denial of service in Cisco IOS XE Software

1) Resource exhaustion

EUVDB-ID: #VU62337

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 - Resource exhaustion

Exploit availability: No

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

External links

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

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.