Cisco IOS Software SSH DoS (cisco-sa-ssh-excpt-dos-FzOBQTnk)

high Nessus Plugin ID 165676


The remote device is missing a vendor-supplied security patch


According to its self-reported version, Cisco IOS Software and Cisco IOS XE Software is affected by denial of service vulnerability. An authenticated, remote attacker can exploit this, by continuously connecting to an affected device and sending specific SSH requests to cause an affected device to reload.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.


Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvx63027

See Also

Plugin Details

Severity: High

ID: 165676

File Name: cisco-sa-ssh-excpt-dos-FzOBQTnk-ios.nasl

Version: 1.6

Type: combined

Family: CISCO

Published: 10/5/2022

Updated: 3/23/2023

Risk Information


Risk Factor: Medium

Score: 4.4


Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2022-20920


Risk Factor: High

Base Score: 7.7

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2022

Vulnerability Publication Date: 9/28/2022

Reference Information

CVE: CVE-2022-20920