QID 317053

Date Published: 2021-09-24

QID 317053: Cisco Internetwork Operating System (IOS) XE Software for Cisco cBR-8 Converged Broadband Routers Common Open Policy Service Denial of Service (DoS) Vulnerability (cisco-sa-cbr8-cops-Vc2ZsJSx)

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.

Affected Products:
This vulnerability affects Cisco cBR-8 Converged Broadband Routers if they are running a release of Cisco IOS XE Software earlier than Release 16.12.1z1 or Release 17.3.1x and have the COPS feature enabled.

QID Detection Logic (Authenticated):
The check matches Cisco IOS XE version retrieved via Unix Auth using "show version" command.
QID Detection Logic (Unauthenticated):
The check matches Cisco IOS XE version retrieved via SNMP or TCP/IP Fingerprint or NTP or Telnet.

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.

  • CVSS V3 rated as Critical - 8.6 severity.
  • CVSS V2 rated as Medium - 4.3 severity.
    • Solution

    Customers are advised to refer to cisco-sa-cbr8-cops-Vc2ZsJSx for more information.

    Vendor References

    CVEs related to QID 317053

    CVE-2021-1622 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-cbr8-cops-Vc2ZsJSx URL Logo tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbr8-cops-Vc2ZsJSx
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