CVE-2022-20678: Cisco IOS XE Software AppNav-XE Denial of Service Vulnerability
First published: Fri Apr 15 2022(Updated: )
A vulnerability in the AppNav-XE feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. 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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XE | =16.9.6 | |
| Cisco IOS XE | =16.12.4 | |
| Cisco IOS XE | =16.12.5 | |
| Cisco IOS XE | =17.3.3 | |
| Cisco Catalyst 8000v Edge | ||
| Cisco Cloud Services Router 1000v | ||
| Cisco 1100-4g Integrated Services Router | ||
| Cisco 1100-6g Integrated Services Router | ||
| Cisco 1101 Integrated Services Router | ||
| Cisco 1109 Integrated Services Router | ||
| Cisco 1111x Integrated Services Router | ||
| Cisco 111x Integrated Services Router | ||
| Cisco 1120 Integrated Services Router | ||
| Cisco 1131 Integrated Services Router | ||
| Cisco 1160 Integrated Services Router | ||
| Cisco 4221 Integrated Services Router | ||
| Cisco 4331 Integrated Services Router | ||
| Cisco 4431 Integrated Services Router | ||
| Cisco 4461 Integrated Services Router | ||
| Cisco Asr 1001-x | ||
| Cisco Asr 1002-x | ||
| Cisco Catalyst 8300-1n1s-4t2x | ||
| Cisco Catalyst 8300-1n1s-6t | ||
| Cisco Catalyst 8300-2n2s-4t2x | ||
| Cisco Catalyst 8300-2n2s-6t | ||
| Cisco Catalyst 8500 | ||
| Cisco Catalyst 8500-4qc | ||
| Cisco Catalyst 8500l |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this Cisco IOS XE software vulnerability?
The vulnerability ID for this Cisco IOS XE software vulnerability is CVE-2022-20678.
What is the severity of CVE-2022-20678?
The severity of CVE-2022-20678 is high.
How does CVE-2022-20678 impact Cisco IOS XE Software?
CVE-2022-20678 could allow an unauthenticated remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition.
Which versions of Cisco IOS XE Software are affected by CVE-2022-20678?
Cisco IOS XE Software versions 16.9.6, 16.12.4, 16.12.5, and 17.3.3 are affected by CVE-2022-20678.
How can I mitigate the CVE-2022-20678 vulnerability?
There is currently no known mitigation for CVE-2022-20678. It is recommended to apply the necessary updates or patches provided by Cisco.
- collector/nvd-index
- agent/type
- agent/weakness
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/last-modified-date
- agent/severity
- agent/title
- agent/author
- agent/tags
- agent/first-publish-date
- agent/description
- agent/event
- vendor/cisco
- canonical/cisco ios xe
- version/cisco ios xe/16.9.6
- version/cisco ios xe/16.12.4
- version/cisco ios xe/16.12.5
- version/cisco ios xe/17.3.3
- canonical/cisco catalyst 8000v edge
- canonical/cisco cloud services router 1000v
- canonical/cisco 1100-4g integrated services router
- canonical/cisco 1100-6g integrated services router
- canonical/cisco 1101 integrated services router
- canonical/cisco 1109 integrated services router
- canonical/cisco 1111x integrated services router
- canonical/cisco 111x integrated services router
- canonical/cisco 1120 integrated services router
- canonical/cisco 1131 integrated services router
- canonical/cisco 1160 integrated services router
- canonical/cisco 4221 integrated services router
- canonical/cisco 4331 integrated services router
- canonical/cisco 4431 integrated services router
- canonical/cisco 4461 integrated services router
- canonical/cisco asr 1001-x
- canonical/cisco asr 1002-x
- canonical/cisco catalyst 8300-1n1s-4t2x
- canonical/cisco catalyst 8300-1n1s-6t
- canonical/cisco catalyst 8300-2n2s-4t2x
- canonical/cisco catalyst 8300-2n2s-6t
- canonical/cisco catalyst 8500
- canonical/cisco catalyst 8500-4qc
- canonical/cisco catalyst 8500l