CVE-2021-1622: Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers Common Open Policy Service Denial of Service Vulnerability
First published: Thu Sep 23 2021(Updated: )
A vulnerability in the Common Open Policy Service (COPS) of Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to cause resource exhaustion, resulting in a denial of service (DoS) condition. This vulnerability is due to a deadlock condition in the code when processing COPS packets under certain conditions. An attacker could exploit this vulnerability by sending COPS packets with high burst rates to an affected device. A successful exploit could allow the attacker to cause the CPU to consume excessive resources, which prevents other control plane processes from obtaining resources and results in a DoS.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XE | <16.12.1z1 | |
| Cisco IOS XE | =17.3.1x | |
| Cisco 7600 Router | ||
| Cisco Asr 901-12c-f-d | ||
| Cisco Asr 901-12c-ft-d | ||
| Cisco Asr 901-4c-f-d | ||
| Cisco Asr 901-4c-ft-d | ||
| Cisco Asr 901-6cz-f-a | ||
| Cisco Asr 901-6cz-f-d | ||
| Cisco Asr 901-6cz-fs-a | ||
| Cisco Asr 901-6cz-fs-d | ||
| Cisco Asr 901-6cz-ft-a | ||
| Cisco Asr 901-6cz-ft-d | ||
| Cisco cBR-8 |
Remedy
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbr8-cops-Vc2ZsJSx
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Reference Links
Frequently Asked Questions
What is CVE-2021-1622?
CVE-2021-1622 is a vulnerability in the Common Open Policy Service (COPS) of Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers.
What is the severity of CVE-2021-1622?
The severity of CVE-2021-1622 is high with a CVSS score of 8.6.
How does CVE-2021-1622 impact Cisco IOS XE Software?
CVE-2021-1622 could allow an unauthenticated, remote attacker to cause resource exhaustion, resulting in a denial of service (DoS) condition.
How can I fix CVE-2021-1622?
To mitigate the vulnerability, Cisco recommends upgrading to a fixed release of Cisco IOS XE Software.
Where can I find more information about CVE-2021-1622?
You can find more information about CVE-2021-1622 on the Cisco Security Advisory website.
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- vendor/cisco
- canonical/cisco ios xe
- version/cisco ios xe/17.3.1x
- canonical/cisco 7600 router
- canonical/cisco asr 901-12c-f-d
- canonical/cisco asr 901-12c-ft-d
- canonical/cisco asr 901-4c-f-d
- canonical/cisco asr 901-4c-ft-d
- canonical/cisco asr 901-6cz-f-a
- canonical/cisco asr 901-6cz-f-d
- canonical/cisco asr 901-6cz-fs-a
- canonical/cisco asr 901-6cz-fs-d
- canonical/cisco asr 901-6cz-ft-a
- canonical/cisco asr 901-6cz-ft-d
- canonical/cisco cbr-8