QID 317046

Date Published: 2021-09-23

QID 317046: Cisco Internetwork Operating System (IOS) XE Software Rate Limiting Network Address Translation Denial of Service (DoS) Vulnerability (cisco-sa-ratenat-pYVLA7wM)

A vulnerability in the Rate Limiting Network Address Translation (NAT) feature of Cisco IOS XE Software could allow an unauthenticated,
remote attacker to cause high CPU utilization in the Cisco QuantumFlow Processor of an affected device, resulting in a denial of service (DoS) condition.

Affected Products
Cisco IOS XE Software if the Rate Limiting NAT feature is 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 QuantumFlow Processor utilization to reach 100 percent on the
affected device, resulting in a DoS condition.

  • CVSS V3 rated as Critical - 8.6 severity.
  • CVSS V2 rated as Medium - 5 severity.
    • Solution

    Customers are advised to refer to cisco-sa-ratenat-pYVLA7wM for more information.

    Vendor References

    CVEs related to QID 317046

    CVE-2021-1624 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-ratenat-pYVLA7wM URL Logo tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ratenat-pYVLA7wM
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