cisco-sa-ssh-excpt-dos-FzOBQTnk: Cisco IOS and IOS XE Software SSH Denial of Service Vulnerability
First published: Wed Sep 28 2022(Updated: )
A vulnerability in the SSH implementation of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. This vulnerability is due to improper handling of resources during an exceptional situation. An attacker could exploit this vulnerability by continuously connecting to an affected device and sending specific SSH requests. A successful exploit could allow the attacker to cause the affected device to reload. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ssh-excpt-dos-FzOBQTnk This advisory is part of the September 2022 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2022 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication.
Credit: This vulnerability was found during the resolution a Cisco TAC support case
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS | ||
| Cisco IOS XE Software |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-ssh-excpt-dos-FzOBQTnk?
The severity of cisco-sa-ssh-excpt-dos-FzOBQTnk is critical as it allows an authenticated remote attacker to reload the affected device.
How do I fix cisco-sa-ssh-excpt-dos-FzOBQTnk?
To fix cisco-sa-ssh-excpt-dos-FzOBQTnk, apply the latest available software updates to Cisco IOS and IOS XE software.
What systems are affected by cisco-sa-ssh-excpt-dos-FzOBQTnk?
cisco-sa-ssh-excpt-dos-FzOBQTnk affects devices running Cisco IOS Software and Cisco IOS XE Software.
Who can exploit cisco-sa-ssh-excpt-dos-FzOBQTnk?
An authenticated remote attacker can exploit cisco-sa-ssh-excpt-dos-FzOBQTnk to initiate a denial-of-service condition.
What is the potential impact of cisco-sa-ssh-excpt-dos-FzOBQTnk?
The potential impact of cisco-sa-ssh-excpt-dos-FzOBQTnk is that it can cause the affected device to reload, disrupting network services.
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