Cisco Security Advisory - Cisco IOS XE Software AppNav-XE Denial of Service Vulnerability

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Cisco IOS XE Software AppNav-XE Denial of Service Vulnerability

<p>A vulnerability in the AppNav-XE feature of Cisco&nbsp;IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition.&nbsp;</p>
<p>This vulnerability is due to the incorrect handling of certain TCP segments. An attacker could exploit this vulnerability by sending a stream of crafted TCP traffic at a high rate through an interface of an affected device. That interface would need to have AppNav interception enabled. A successful exploit could allow the attacker to cause the device to reload.</p>
<p>Cisco&nbsp;has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.</p>
<p>This advisory is available at the following link:<br><a href="https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-appnav-xe-dos-j5MXTR4">https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-appnav-xe-dos-j5MXTR4</a></p>

<p>This advisory is part of the April 2022 release of the Cisco&nbsp;IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see <a href="https://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74561">Cisco&nbsp;Event Response: April 2022 Semiannual Cisco&nbsp;IOS and IOS XE Software Security Advisory Bundled Publication.</a></p>


     
         
Security Impact Rating:  High
   
   
       
CVE: CVE-2022-20678
Source: Cisco IOS XE Software AppNav-XE Denial of Service Vulnerability