A vulnerability in the Zone-Based Policy Firewall feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to prevent the Zone-Based Policy Firewall from correctly classifying traffic. This vulnerability exists because ICMP and UDP responder-to-initiator flows are not inspected when the Zone-Based Policy Firewall has either Unified Threat Defense (UTD) or Application Quality of Experience (AppQoE) configured. An attacker could exploit this vulnerability by attempting to send UDP or ICMP flows through the network. A successful exploit could allow the attacker to inject traffic through the Zone-Based Policy Firewall, resulting in traffic being dropped because it is incorrectly classified or in incorrect reporting figures being produced by high-speed logging (HSL).
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published: 2021-09-23T02:25:25.516249Z

Updated: 2024-09-17T02:27:51.043Z

Reserved: 2020-11-13T00:00:00

Link: CVE-2021-1625

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-09-23T03:15:13.733

Modified: 2023-11-07T03:28:49.697

Link: CVE-2021-1625

cve-icon Redhat

No data.